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Which among these animals can live both in water and on land?
A
B
C
D All of these

Study the given figure carefully.


Which of the following reactions explains the above change most appropriately?

A ZnSO₄ + Cu → CuSO₄ + Zn
B CuSO₄ + Fe → FeSO₄ + Cu
C FeSO₄ + Cu → CuSO₄ + Fe
D CuSO₄ + Zn → ZnSO₄ + Cu

Marking on a bulb is 60 W, 220 V. What does it signify?

AThe bulb is connected across the 220 volts, 60 joules of energy is consumed for every second.
BThe bulb is connected across 60 joules, 220 volts of energy is consumed.
C60 unit of current will flow in the bulb.
D220 unit of current will flow in the bulb.

The tail of a comet points away from the Sun due to

A Centrifugal force
B Electrical repulsion
C Attraction of comet due to other planets
D Radiation pressure.

Which of the following in an incorrect food chain?

AGrass → Zebra → Tiger
BGrass → Grasshopper → Mouse → Snake → Hawk
CSea grass → Snail → Fish → Seal → Polar bear
DOrchids → Mice → Moths → Owl

Study the given flow chart and identify P, Q and R.

Refer to the food items given in the box.

P : Which among these will give you the most energy?
Q : Which among these is body building food?

A P-4, Q-1
B P-1, Q-3
C P-2, Q-3
D P-3, Q-2

Trees take many years to reach maturity. Paper is made from wood pulp. As more people are using recycled paper, fewer trees would be cut down. Which of these graphs shows the result that would be obtained after a few years of carrying out this act of conservation?

A
B
C
D

Which statement is INCORRECT for water?

AWater can be stored in dams, rivers and ponds.
BAll living things require water.
CSugar does not dissolve in water.
DGroundwater is obtained from wells and by handpumps.

Find which is not correctly matched.