Question : When a freely falling object eventually stops on reaching the ground __________.

Option 1: Its potential energy decreases.

Option 2: Its kinetic energy increases.

Option 3: Its potential energy decreases, and its kinetic energy increases.

Option 4: None of the options is correct.

Question : As one moves from the polar region towards the equator the diversity of plant, and animal species __________.

Option 1: increases

Option 2: decreases

Option 3: no changes

Option 4: no option is correct

Question : Directions: Among five objects E, F, G, H, and K, the weight of H is 3 times the weight of K. The weight of G is 7.5 kg. The weight of E is twice the weight of F. The weight of K is 4 times the weight of G. If the weights of F and G are equal, then which is the second heaviest object?

Option 1: K

Option 2: H

Option 3: E

Option 4: F

Question : Directions: The weight of P is twice that of Q. The weight of Q is half that of R. The weight of R is 3 times that of T. The weight of T is half that of S. The weight of Q is greater than the weight of how many people among P, R, S, and T?

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 4

Question : Due to the greenhouse effect:

Option 1: the temperature of the Earth is decreasing

Option 2: the temperature of the Earth is increasing

Option 3: the temperature of the Earth is constant

Option 4: No option is correct