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Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?

AKinetic energy decreases and potential energy increases.
BKinetic energy increases and potential energy decreases.
CBoth potential energy and kinetic energy decrease.
DBoth potential energy and kinetic energy increase.

Find the mode and median of the given data:

12, 14, 12, 16, 15, 13, 14, 18, 19, 12, 14, 15, 16, 15, 16, 16, 15, 17, 13, 16, 16, 15, 15, 13, 15, 17, 15, 14, 15, 13, 15, 14

(A) 15, 15

(B) 17, 12

(C) 15, 18

Coal, petroleum and natural gas are fuels. Which of the following statements is false regarding these fuels?

A They are burnt to produce energy.
B They are found as solids and gases only.
C They release harmlful gases into the air when burnt.
D They are being used faster than they can be replaced.

The processes in the life cycle of a flowering plant are given here in random order.
a → Seeds develop
b → Flowers bloom
c → Seeds germinate
d → Flowers get pollinated
e → New plant grows
f → Seeds disperse
Select the option that arranges these processes in correct order.

A e → c → b → d → a → f
B c → e → b → d → a → f
C e → c → d → b → a → f
D c → e → d → b → f → a

Rahul took a solution of magnesium hydroxide and added excess of lemon juice to it. Which of the following statements are correct about the resulting solution?
It turns pink with phenolphthalein indicator.
2. It turns blue litmus red.
3. It is basic in nature.
4. The reaction takes place is neutralisation reaction.

A1 and 2
B3 and 4
C2 and 4
D1 , 2 and 3

What comes next in the given pattern ?

A, I, P, V, A, E,     ?    

(A) E

(B) F

(C) G

Select a figure from amongst the four alternatives, which when placed in the blank space of Fig.(X) would complete the pattern.

(A)

(B)

(C)

Which of the following is/are INCORRECT about elephant herd?

(i) The elephant herd have only females and baby elephants.

(ii) The oldest male is the leader of the herd.

(iii) A herd may have 10-12 female elephants and young ones.

(iv) Baby elephants live in the herd till they are 1415 years old.

(A) (ii) & (iv)

(B) (i), (ii) & (iv)

(C) (iii) & (iv)

Rohan puts his hand into a bowl of goldfish. He notices that all the goldfish quickly swim away. Why do you think this happens?


A The goldfish detect more food on the other side of the tank.
B There is more space on the other side of the tank for the goldfish to move about.
CThere is more water on the other side of the tank.
D The goldfish respond to the change in their environment.