General Science 6th Class Chapter 12 Solar System Solved Exercise

General Science

6th Class

Chapter 12

Solar System

Questions

12.1 Encircle the correct option.

1. Which is the largest planet?

a. Earth        b. Mars        c. Jupiter        d. Venus

2. Which is the nearest planet to the Sun?

a. Saturn        b. Mercury        c. Venus        d. Earth

3. How long does it take for a geostationary satellite to complete one orbit?

a. one day        b. one week        c. one month        d. one year

4. Which of the following emits its own light?

a. Moon        b. Venus        c. Sun        d. Jupiter

5. Before which planet, does the Venus orbit?

a. Mercury        b. Mars        c. Earth        d. Saturn

6. The system that locates the position of an object on the Earth surface is:

a. GRS        b. GMS        c. GPS        d. PGS

7. The 1st artificial satellite was sent into space in:

a. 1945        b. 1955        c. 1957        d. 1962

8. Tail of comet points:

a. towards the Sun        b. away from the Sun

c. towards the Earth        d. away from the Earth

12.3 Briefly describe:

1. Characteristics of planets.

Ans.

i. Planets revolve around the sun.

ii. They do not shine with their own light.

2. Characteristics of asteroids.

Ans.

i. Asteroids are the pieces of rocks, metals or both the metals and rocks revolve around the Sun.

ii. Asteroids have different shapes and sizes.

3. Characteristics of comets.

Ans.

i. These are the lumps of frozen gases, rocks and dust particles.

ii. The comets revolve with very low speed and complete a revolution around the sun in a long time.

iii. They are only seen when they come close to the sun.

4. Characteristics of meteorites.

Ans.

i. It is a large meteorite.

ii. It hits the Earth's Surface without completely burning up.

iii. It makes a crater on the ground.

General Science 6th Class Chapter 11 Technology in Everyday Life Solved Exercise

General Science

6th Class

Chapter 11

Technology in Everyday Life

Questions

11.1 Encircle the correct option.

1. Summer season vegetables are generally grown in:

a. November-December        b. February-March

c. April-May        d. July-August

2. Winter season vegetables are generally grown in:

a. January-February        b. June-July

c. July-August        d. September-October

3. Which of the following is a summer season vegetable?

a. radish        b. carrot        c. garlic        d. brinjal

4. Which of the following is a winter season vegetable?

a. turnip        b. cucumber        c. okra        d. tomato

5. Fertilizers provide the plants:

a. water        b. air        c. light        d. nutrients

6. Which of the following is not used in the preparation of yogurt?

a. raw milk        b. pre-made yogurt        c. thermometer        d. red chilly

7. Which of the following is not used in making cheese at home?

a. milk        b. sugar        c. salt        d. lemon juice

11.2 Write short answers.

1. Write names of some summer plants.

Ans.

Brinjal, Tomato, Pepper and Cucumber are summer plants.

2. State names of some winter plants.

Ans.

Carrot, Radish, Spinach, Turnip and Garlic are winter plants.

3. Write names of elements present in chemical fertilizers.

Ans.

Sodium, Potassium, Phosphorus etc. are present in chemical fertilizers.

4. Give names of tools required for preparation of soil bed for vegetables.

Ans.

Earthen Portland, Manure, shovel, seeds of desired plant and water are required tools for preparation of soil bed.

5. Name the ingredients required for preparation of yogurt.

Ans.

Milk, thermometer, one liter of raw milk and 2 table spoon of pre-made yogurt.

6. State the ingredients required for preparation of cheese.

Ans.

Raw milk (1L), lemon juice 1 table spoon, white vinegar, (distilled) salt or herb (optional).

General Science 6th Class Chapter 10 Magnetism Solved Exercise

General Science

6th Class

Chapter 10

Magnetism

Questions

10.1 Encircle the correct option.

1. A magnet can attract objects made of

a. copper        b. iron        c. aluminum        d. silver

2. The ends of a magnet are called its

a. sides        b. heads        c. terminals        d. poles

3. A freely suspended bar magnet always stays along

a. east-west direction        b. north-south direction

c. any direction        d. keeps oscillating

4. Magnet is used in

a. a dynamo        b. an electric bell        c. a speaker        d. a heater

5. Which one is the true statement

a. North pole attracts north pole        b. North pole repels north pole

c. South pole repels north pole        d. South pole attracts south pole

6. To increase the strength of an electromagnet, we can:

a. change the direction of the current        b. insert a wooden core inside a coil

c. increase the amount of current flowing        d. decrease the amount of current flowing

7. The space around a magnet where it can attract magnetic materials:

a. electric field        b. magnetic field        c. magnetic pole        d. magnetic core

8. Which will not cause a magnet lose its magnetism?

a. heating it        b. dropping it repeatedly

c. coating it with oil        d. hitting it

9. Which will not increase the strength of an electromagnet?

a. adding an iron core        b. adding a plastic core

c. coiling the wire        d. increasing the current

10.2 Write short answers.

1. What is a magnet?

Ans.

A material or object that can attract the objects made of iron, nickel and cobalt is called magnet.

2. What is the difference between a permanent magnet and temporary magnet?

Ans.

Permanent magnet:

The magnets which don't lose their magnetic property easily are called permanent magnets. Naturally occurring magnets, e.g. load stone are permanent magnets.

Temporary magnet:

The objects such as iron or steel pieces are magnetized and converted into magnet in the presence of magnetic field or by rubbing permanent magnet on them. Such magnets are called temporary magnets.

3. Write strokes method of making a magnet.

Ans.

• Take a bar magnet and an iron nail.
• Rub or stroke the bar magnet on the iron nail many times in the same direction.
• The iron nail will become temporary magnet.
• Check it by bringing near paper clips or common pins.

4. Define magnetic field.

Ans.

A magnet exerts a force on an object (magnetic material) which is brought close to it. The region around a magnet where it can attract magnetic material is called magnetic field.

5. Write names of five things which are made of magnetic material.

Ans.

• Electric bell
• Speaker
• Dynamo
• Electromagnetic crane
• Credit and debit cards

General Science 6th Class Chapter 9 Electricity Solved Exercise

General Science

6th Class

Chapter 9

Electricity

Questions

9.1 Encircle the correct option.

1. A positively charged particle:

a. electron        b. proton        c. neutron        d. atom

2. A device that stores chemical energy and converts it into electric energy when connected in a circuit:

a. electric switch        b. bulb        c. cell        d. metallic wire

3. A circuit that provides multiple paths to the current to flow:

a. series        b. parallel        c. open        d. short

4. The type of circuit used in domestic wiring:

a. series        b. parallel        c. open        d. short

5. A device used to open or close an electric circuit:

a. battery        b. bulb        c. switch        d. wire

6. Increasing the number of batteries in a series circuit:

a. increases the brightness of the bulbs

b. decreases the brightness of the bulbs

c. converts the series circuit to parallel circuit

d. stops the flow of current through the circuit

7. The current has only one path to flow through:

a. series circuit        b. parallel circuit        b. open circuit        d. close circuit

9.2 Write short answers.

1. What is static electricity?

Ans.

When the charge at rest is gathered on an object, it is known as static electricity.

2. Is series circuit preferably used in home wiring?

Ans.

No, series circuit is not used in home wiring. Because if a fault happens at any part of the circuit, it stops the flow of current in the whole circuit.

3. What is current electricity?

Ans.

When the positive terminal of battery is connected to its negative terminal through a metallic (copper) wire, charge being to flow through the wire. The electricity produced by the flow of charge is called current electricity.

4. What types of charges repel each other?

Ans.

Like charges repel each other.

5. Name a few components of electric circuit.

Ans.

Electric cell or battery, key (switch), conductors (wires) and bulb.

General Science 6th Class Chapter 8 Energy Solved Exercise

General Science

6th Class

Chapter 8

Energy

Questions

8.1 Encircle the correct option.

1. Temperature of an object is the measure of _________ of its particles:

a. gravitational potential energy        b. strain energy

c. kinetic energy        d. sound energy

2. When we drill a hole in an object, which of the following forms of kinetic energy is useful to us?

a. sound        b. heat        c. light        d. mechanical energy

3. Our food is a source of:

a. mechanical energy        b. chemical energy        c. sound energy        d. electrical energy

4. An example of renewable energy sources:

a. coal        b. natural gas        c. wind        d. petrol

5. During work done, energy is:

a. produced        b. destroyed        c. wasted        d. converted into other form

6. Which of the following is not an energy converter?

a. table        b. radio        c. fan        d. room heater

7. A fruit after its detachment from a tree-stalk begins to convert energy due to its position into:

a. strain energy        b. kinetic energy        c. chemical energy        d. electrical energy

8. The mixture of gases formed by the decay of animals wastes:

a. greenhouse gas        b. biogas        c. natural gas        d. water gas

9. Engine of a vehicle starts working using:

a. electrical energy        b. light energy        c. heat energy        d. sound energy

10. During an energy conversion, the total amount of energy:

a. destroys        b. decreases        c. increases        d. remains the same

8.2 Write short answer.

1. Name three forms of stored energy.

Ans.

i. Elastic potential energy.

ii. Energy stored in food, batteries, biomass and fossil fuels, etc. is chemical energy.

iii. Gravitational potential energy.

2. Dissipated energy is also called wasted energy. Why?

Ans.

When energy is converted to a form of energy useful to us, many other forms of energy that are not useful to us may be produced and spread out. This spreading out energy into different forms is called dissipation of energy. The dissipated forms of energy are wasted. Hence, the dissipated energy is also called wasted energy.

Example: When we switch on the electric bulb, light is useful to us, but the heat produced by glowing bulb is wasted and thus called dissipated energy.

3. Define the law of conservation of energy.

Ans.

"Energy can neither be created nor be destroyed, but, it can be changed from one form to another" This fact is known as law of law of conservation of energy.

4. Where does the energy produced by a dynamo come from?

Ans.

A dynamo is a device typically located in the hub of a bicycle's wheel that converts the energy generated by the wheel spinning to electrical energy. That energy is then used to run front and rear dynamo lights on the bicycle.

General Science 6th Class Chapter 7 Mixtures Solved Exercise

General Science

6th Class

Chapter 7

Mixtures

Questions

7.1 Encircle the correct option.

1. Select the one that is different from others.

a. ice        b. water        c. sodium        d. steam

2. Which is true for a compound?

a. a substance consisting of two or more elements loosely mixed together in a fixed ratio by mass

b. a substance consisting of two or more elements chemically combined in a fixed ratio by mass

c. a substance consisting of two or more elements physically mixed in any ratio by mass

d. a substance consisting of two or more metals mixed in their molten form

3. Which one of the following is not an element?

a. chlorine        b. sulphur        c. sugar        d. zinc

4. Which one of the following is non-metal?

a. phosphorus        b. aluminum        c. copper        d. magnesium

5. Which one of the following statement is false?

a. carbon, oxygen, hydrogen and silver are elements

b. water is made up of hydrogen and oxygen

c. an element is a substance, which can be decomposed by heating

d. gold is a metal

6. Which one of the following is matter?

a. heat        b. rain        c. sound        d. light

7. Which one of the following is mixture?

a. air        b. water        c. carbon dioxide        d. oxygen

8. Which one of the following is a homogeneous mixture?

a. soil        b. steel        c. graphite        d. iron

9. Which one of the following is a solution?

a. rock        b. copper        c. diamond        d. brass

10. Technique used for separation of coloured components of their mixture:

a. distillation        b. chromatography        c. sublimation        d. crystallization

7.2 Write short answers.

1. Define a solute.

Ans.

The solute is substance that dissolves in solution and present in smaller quality is called solute.

2. Define a solution

Ans.

A homogeneous mixture of two or more substance is called solution.

3. Give five examples of heterogeneous mixture.

Ans.

Salad, Pizza, Rock, sugar mixed in sand and sandwich are examples of heterogeneous mixture.

4. Give five examples of homogeneous mixture.

Ans.

Air, sugar, coffee, vinegar and steel are examples of homogeneous mixture.

5. Give three examples of alloys.

Ans.

Steel, Brass and white gold are examples of alloys.

General Science 6th Class Chapter 6 Elements and Compounds Solved Exercise

General Science

6th Class

Chapter 6

Elements and Compounds

Questions

6.1 Encircle the correct option.

1. Which one of the following is a metallic element?

a. hydrogen        b. helium        c. lithium        d. carbon

2. Which one of the following is a non-metallic element?

a. iron        b. aluminium        c. beryllium        d. oxygen

3. Which one of the following is a metalloid element?

a. gold        b. boron        c. silver        d. nitrogen

4. Choose an atom which can exist independently at room temperature?

a. Cu        b. Na        c. O        d. Ne

5. How many hydrogen atoms are present in 1 molecule of ammonia?

a. 1        b. 2        c. 3        d. 4

6. How many atoms are present in one molecule of helium?

a. 1        b. 2        c. 3        d. 4

7. C₆H₁₂O₆ is the formula of glucose. How many oxygen atoms are there in one molecule of glucose?

a. 3        b. 6        c. 9        d. 12

8. Which one of the following is an element?

a. O₃        b. CO₂        c. CH₄        d. H₂O

9. Number of neutrons in helium atom:

a. 1        b. 2        c. 3        d. 4

10. This picture indicates the structure of:

a. an atom        b. an element        c. a compound        d. none of these

11. Water, carbon dioxide, ammonia and methane are examples of:

a. atoms        b. elements        c. compounds        d. mixtures

12. Hydrogen, helium, carbon, nitrogen and oxygen are examples of:

a. atoms        b. elements        c. compounds        d. mixtures

6.2 Write short answer.

1. Define element.

Ans.

An element is a substance which consist of only one kind of atoms. It is simplest form of matter.

2. Write the names and symbols of any two metals.

Ans.

Magnesium Mg and Iron Fe.

3. Write the names and symbols of any four non-metals.

Ans.

Hydrogen H, Nitrogen N, Neon Ne, Oxygen O.

4. Write names and symbols of any three noble gases.

Ans.

Neon Ne, Argon Ar, Krypton Kr.

5. Write the names and formulae of any five compounds.

Ans.

Ammonia NH3, Sodium chloride NaCl, Glucose C6H12O6, Methane CH4, Carbon dioxide CO2.

General Science 6th Class Chapter 5 Matter as Particles Solved Exercise

General Science

6th Class

Chapter 5

Matter as Particles

Questions

5.1 Encircle the correct option.

1. There are strong forces of attraction between the particles of:

a. solids        b. liquids        c. gases        d. all of these

2. Solid and liquid objects cannot be compressed easily as their particles are:

a. closely packed        b. loosely packed

c. lacking spaces among them        d. scattered irregularly

3. The process of changing gas into liquid:

a. melting        b. evaporation        c. freezing        d. condensation

4. Changing of substance directly from solid state to gaseous state on heating is termed as:

a. boiling        b. sublimation        c. melting        d. diffusion

5. Materials that don't take the shape of the container:

a. solids        b. liquids        c. gases        d. all of these

6. When a gas condenses, it becomes a:

a. solid        b. liquid        c. crystal        d. another gas

7. When a solid object is heated, its particles begin to:

a. vibrate fast        b. vibrate slowly        c. stop vibrating        d. move freely

8. Boiling point of water is:

a. 0˚ C       b. 0˚ F        c. 100˚ C        d. 100˚ F

9. Movement of particles from an area where they are more to an area where they are less:

a. boiling        b. evaporation        c. diffusion        d. sublimation

10. Which of the following is opposite to boiling?

a. evaporation        b. freezing        c. melting        d. condensation

5.2 Give short answers.

1. How can we change the physical state of matter?

Ans.

Physical state of matter can be changed by the processes of melting, boiling, condensation and freezing.

2. How do liquids differ from gases?

Ans.

Liquids differ from gases as in liquids, the particles are present very close to one another and have attractive forces among them. In gases, particles are away from each other and have almost no attractive forces present among them.

3. How do solids differ from liquids with regard to particles arrangement?

Ans.

In solids, particles have an orderly arrangement where they are present tightly packed with each other, while in liquids, the particles are present very close to one another but they are not regularly arranged.

4. A liquid on cooling is converted into its solid state. What will happen to a solid when it is cooled?

Ans.

Cooling a solid decreases the motion of its particles. A decrease in motion of particles allow the attraction between the particles to bring them a more close together.

5. Write down the names of five liquids and five gases which you know.

Ans.

Liquids: Water, Milk, Blood, Gasoline, Mercury.

Gases: Natural gas, oxygen, nitrogen, Helium, carbon dioxide.

General Science 6th Class Chapter 4 Human Digestive System Solved Exercise

General Science

6th Class

Chapter 4

Human Digestive System

Questions

4.1 Encircle the correct option.

1. A part of the digestive system which is not in correct with food is:

a. small intestine        b. stomach        c. liver        d. large intestine

2. In humans, most of digestion takes place in:

a. mouth        b. oesophagus        c. stomach        d. small intestine

3. Saliva is produced in:

a. oral cavity        b. oesophagus        c. stomach        d. small intestine

4. The food digested by the enzyme "sucrase" belongs to nutrients group:

a. carbohydrates        b. fats        c. oils        d. proteins

5. The muscular tube leading from oral cavity to stomach:

a. small intestine        b. large intestine        c. oesophagus        d. bile duct

6. Germs present in food are killed in stomach by:

a. hydrochloric acid        b. citric acid        c. carbonic acid        d. none of these

7. Digestive enzymes convert starch into:

a. fatty acids        b. vitamins        c. minerals        d. simple sugar

8. Proteins are digested into:

a. fatty acids        b. amino acids        c. glycerol        d. glucose

9. Digested food is absorbed into blood through the walls of:

a. villi        b. large intestine        c. stomach        d. bile duct

10. Water and salts from indigested food are absorbed into blood through walls of:

a. small intestine        b. large intestine        c. villi        d. gallbladder

4.3 Give short answer.

1. Define digestion.

Ans.

The process during which large and complex molecules are broken down into such smaller pieces which pass across walls of small intestine and absorb into the blood is called digestion.

2. How is chewing important in human digestive system?

Ans.

Chewing activity mixes saliva in the food to make it soft.

3. Name the liquid which is secreted by salivary glands.

Ans.

Salivary glands secrete saliva.

4. Describe the role of oesophagus in human digestive system.

Ans.

Oesophagus is a narrow muscular tube through which food passes from oral cavity to the stomach.

5. Why do carbohydrates, fats and proteins need to be broken down into smaller molecules?

Ans.

The food we eat consist of large and complex molecules of carbohydrates, fats and proteins, these complex food molecules cannot pass across wall of small intestine for absorption in blood.

6. What are the products of digestion of carbohydrates, proteins and fats?

Ans.

Carbohydrates from glucose, protein gives amino acids and fats release fatty acid and glycerol.

7. What structures secrete enzymes necessary for digestion in man?

Ans.

Salivary glands, gastric glands, liver and pancreas are structures secrete enzymes necessary for digestion in man.

8. How are villi important for absorption?

Ans.

The digested food is absorbed through the wall of villi and passes into the blood streams.

9. How is large intestine important in digestive system of man?

Ans.

Some water and mineral salts are also absorbed into the blood through the walls of the large intestine.

10. Write the functions of gall bladder.

Ans.

Gall bladder stores bile.

General Science 6th Class Chapter 3 Balanced Diet Solved Exercise

General Science

6th Class

Chapter 3

Balanced Diet

Questions

3.1 Encircle the correct option.

1. An immediate source of energy for our body is:

a. mango        b. chicken        c. mushroom        d. meat

2. Food rich in proteins is:

a. potato        b. grapes        c. fish        d. rice

3. Which food is best for providing fats?

a. fruits        b. butter        c. vegetables        d. bread

4. Food rich in carbohydrates is:

a. corn oil        b. beef        c. egg        d. starch

5. Source of vitamin A is:

a. table salt        b. carrot        c. mustard oil        d. sugar

6. Source of starch is:

a. egg        b. meat        c. fish        d. potato

7. Vegetable oils are included in the food group:

a. carbohydrates        b. proteins        c. fats        d. vitamins

8. Balanced diet for an infant is:

a. fruit        b. milk        c. vegetable        d. egg

9. Which vitamin makes the bones strong?

a. Vitamin A        b. Vitamin B        c. Vitamin C        d. Vitamin D

10. Iron is a:

a. vitamin        b. mineral        c. carbohydrate        d. protein

3.2 Give short answers.

1. Why do we need food?

Ans.

Food provide us energy and nutrients needed for vital processes like growth, repair, reproduction and protection.

2. Name major food groups.

Ans.

Food is classified into following major groups.

• Carbohydrates
• Proteins
• Fats
• Vitamins
• Minerals

3. Name sources of vitamin A.

Ans.

Carrot, cod liver etc. are sources of vitamin A.

4. Enlist the sources of vitamin C and D.

Ans.

Vitamin C: Citrus fruits, orange, guava, broccoli, strawberry etc. are sources of vitamin C.

Vitamin D: Milk, cod liver oil and soybean are sources of vitamin D.

5. List sources of minerals.

Ans.

Minerals are found in milk, meat, grains, vegetables, fruits, eggs, fish, etc.

6. What is unbalanced diet?

Ans.

A diet lacking one or more essential components of food needed by a person is called unbalanced diet.

7. Is table salt a mineral?

Ans.

Table salt is mineral due to presence of sodium in it.

General Science 6th Class Chapter 2 Reproduction in Plants Solved Exercise

General Science

6th Class

Chapter 2

Reproduction in Plants

Questions

2.1 Encircle the correct option.

1. Pollination is the transfer of:

a. sepal        b. stamen        c. pollen grain        d. ovum

2. Zygote is formed as a result of:

a. self-pollination        b. cross pollination        c. fertilization        d. double fertilization

3. Zygote develops into:

a. embryo        b. embryo sac        c. endosperm        d. ovule

4. Asexual reproduction in which stem of a plant is buried in soil near the present plant:

a. layering        b. budding        c. cutting        d. grafting

5. The organ of a plant which takes part in sexual reproduction:

a. root        b. stem        c. leaf        d. flower

6. The structure which is helpful to carry sperms to the ovary:

a. pollen tube        b. stigma        c. style        d. ovary

7. Which is the example of natural vegetative propagation?

a. runners' growth into new plant        b. budding        c. cutting        d. grafting

8. Production of new plant from underground stem is an example of:

a. sexual reproduction        b. asexual reproduction

c. self-pollination        d. cross pollination

9. Fusion of a sperm with two polar nuclei forms:

a. zygote        b. embryo        c. ovum        d. endosperm

10. Male reproductive cell:

a. egg        b. sperm        c. neuron        d. zygote

2.2 Differentiate between:

1. Sexual reproduction and asexual reproduction

Ans.

The microorg

2. Self-pollination and cross pollination

Ans.

3. Pollen grain and ovule

Ans.

4. Fertilization and double fertilization

Ans.

5. Budding and grafting

Ans.

6. Scion and stock

Ans.

2.3 Give short answers.

1. Name three self -pollinated plants.

Ans.

Pea, cotton and tomato are self-pollinated plants.

2. Name three cross pollinated plants.

Ans.

Maize, Papaya and rose are cross pollinated plants.

3. Name the underground stems that undergo natural vegetative propagation.

Ans.

Underground stems like bulb and tuber are the example of natural vegetative propagation in plants.

4. What are runners?

Ans.

In some plants such as strawberry and grasses, stems are spread horizontally above the ground. These stems are called runners. Runners have nodes where buds are present. New plants grow from these buds.

5. Name different parts of the carpel (female reproductive structure).

Ans.

Stigma, style and ovary are parts of carpel (female reproduction structure).