CIE iGCSE Co-Ordinated Science B18.1 Energy flow Exam Style Questions Paper 2
Question
A student observes that a substance X does not flow.
Which statement about substance X is correct?
(A) It can be either a gas or a liquid.
(B) It can only be a gas.
(C) It can only be a liquid.
(D) It can only be a solid.
▶️Answer/Explanation
Ans: D
Question
How does an organism in the first trophic level gain energy?
(A) by absorbing energy from sunlight
(B) by breaking down dead or waste organic matter
(C) by eating organisms in the second trophic level
(D) by eating plants
▶️Answer/Explanation
Ans : A
Question
What is an ecosystem?
(A) a chart showing the flow of energy from one organism to another
(B) a diagram giving the energy level of an organism in its environment
(C) a network of interconnected food chains
(D) a unit containing all of the organisms and their environment
▶️Answer/Explanation
Ans: D
Question
Four processes that occur in mammals are listed.
1 muscle contraction
2 cell division
3 excretion
4 maintenance of a constant body temperature
Which processes reduce the amount of energy available to the next trophic level?
(A) 1, 2, 3 and 4
(B) 1 and 2 only
(C) 1, 3 and 4 only
(D) 4 only
▶️Answer/Explanation
Ans: A