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In which of the following cases, the frictional force between the tyres of a car and the road increases?

AWhen the road is wet.
BWhen the speed of the car increases.
CWhen the surface area of the tyres in contact with the road increases.
DWhen there are more passengers in the car.

Read the given statements regarding the lever and select the correct ones.
(i) In beam balance, fulcrum is in the middle.
(ii) A nutcracker is an example of third-class lever.
(iii) In tongs, the fulcrum and the load are at the two ends.
(iv) See-saw is an example of first class lever.

A (i), (iii) and (iv)
B (ii) only
C (iii) and (iv)
D (i) and (ii)

The diagram below shows four beakers of water, P, Q, R and S, at different temperature and volume.

Which one of the following statements is true?

A Beaker P has the most heat energy.
B Beaker R has more heat energy than beaker Q.
C Beaker S has more heat energy than beaker R.
D Beaker P and beaker S have the same amount of heat energy.

Which of the following adaptations of polar bear are not meant for hunting prey and getting protection from predators?
(i) White colour of the fur
(ii) Huge teeth
(iii) Long hair between the pads on its feet
(iv) Two thick layers of the fur
(v) Sharp claws on each foot

A (i) and (v) only
B (iii) and (iv) only
C (ii) and (iii) only
D (i) and (iv) only

Raju is a labourer and works at the site of flyover construction. He works very hard from morning to night. He needs to have strong muscles and bones as he has to carry heavy bricks, cement and other things from one place to another.
Which of these food items would help him to build strong body?

A

B

C

D

Energy used by green plants to make food is __________.

A Wind energy
B Potential energy
C Chemical energy
D Solar energy

Which of the following animal belongs to the same group as the animal shown here?


A Cow
B Parrot
C Snake
D Salamander