Technology in Everyday Life

 Constructed Response Questions:

Ans (i):

Ans (ii):

We use different items in our daily life which are of different shape.

  

Circle	Cube
Dry cake	Gift box
Pizza	Geometry box

Cylinder	Cone	Prism
Gas cylinder	Ice cream	Cottage
Test tube	carrot	candy

Ans (iii):

Solar System and our Earth

 Constructed Response Questions:

Ans (i):

Ans (ii):

Ans (iii):

Earth's Weather and Climate

 Constructed Response Questions:

Ans (i):

Ans (ii):

Climate of Different Zones:

Tropical Zone:

Tropical zone has hot climate because the sun rays fall vertically on this zone.

Temperate Zone:

Temperate zone has mild climate because the sun rays fall slantly on this zone.

Polar Zone:

Polar zone has the coldest climate because the sun are more slanted and less on this zone.

Ans (iii):

With the rise of height from sea level the climate becomes cooler while water bodies make climate of adjacent area is mild this is the reason that the temperature of Skardu, a city of Gilgit Baltistan is below zero degree centigrade while the temperature of Karachi is mild.

Earth and its Resources

 Constructed Response Questions:

Ans (i):

We know about the feed of animals by knowing the structure of mouth and sequence of their teeth.

Ans (ii):

No, we can not obtain fossil of jellyfish.

Force and Motion

 Constructed Response Questions:

Ans (i):

The shoes present in figure (c) is suitable for rocky soil because its structure increase friction, while the shoe in figure (a) is useful to walk on ice surface due to its plane structure and the shoes in figure (b) is helpful in playground.

Ans (ii):

Inclined plane will help us to shift the patient on stage due to its slope.

Forms of Energy and Energy Transfer

  Constructed Response Questions:

Ans (i):

When we bring thermometer near a lighted bulb thermometer show change in temperature reading due to expansion of mercury.

Ans (ii):

Ans (iii):

Matter and its Characteristics

 Constructed Response Questions:

Ans:

The electrician wear rubber gloves during repairing of electric switch because they are insulator current cannot through them.

Human Health

 Constructed Response Questions:

Ans: (i)

Filter paper removes impurities.

Ans: (ii)

No filtration cannot stops germs.

Ans: (iii)

Germs can be killed in water by boiling and adding chemicals.

(chlorine)

Ans: (iv)

Water can be made suitable for drinking by

• Boiling
• Filtration
• Adding chlorine

Ecosystem

 Constructed Response Questions:

Ans:

Biodiversity includes all ecosystems. Self-sustaining and durable ecosystem is called balanced ecosystem. All organisms in an ecosystem. All organisms in an ecosystem depend upon each other for their food, protection and shelter. All organisms in an ecosystem depend upon each other for their food, protection and shelter. They make a food web. If one part of a food web is disturbed, all of the other organisms are affected. For example, if the plants in a food web are destroyed the animals that eat the plants will not survive. All other animals that depend on the plant eating animals will also find it difficult to survive.

Competition occurs when more than one organism tries to use the same limited resources. If a lot of organisms compete for the same limited resources, it is difficult for each organism to obtain the resources they need. Only organisms that can get the needed resources will survive. For example, if too many plants compete for sunlight in a ecosystem, only plants that get enough sunlight will survive. This competition among living things in a balanced ecosystem affects the biodiversity because all organisms depend upon each other in biodiversity.

Characteristics And Life Process of Organisms

 Constructed Response Questions:

Ans: (a)

A tiger piercing and tearing food with its canines.

Ans: (b)

A rat bites and cut food with his Incisors.