What is the function of the rib cage?

• The ribcage supplies blood to lungs. 

• The ribcage purifies the blood. 

• The ribcage protects the lungs. 

Name the organ which is protected by the skull?

• heart

• brain

• liver

Which type of teeth are shown in the image?

• incisors

• canines

• molars

What causes things to fall on the ground?

• gravity

• friction

• evaporation

Which of the following diagram shows a reversible change-

• 
• 
• 
• 

How can we raise a bucket from the well?

• using lever

• using gear

• using pulley

What happens to the heart rate and the body temperature when people exercise? Select all the correct options- 

• When people exercise, their temperature decreases.

• When people exercise, their heart rate decreases.

• When people exercise, their muscles get weaker. 

• When people exercise, their bodies get stronger.

Which of the following equipment is used to measure the mass? 

• 
• 
• 

Sound can be heard because of _________

• gravity

• friction

• air vibration

What happens when we close the switch of lamp? (Select the correct option?

• lights up

• becomes dim

• turns off.