instruction:
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
question:
A meteoroid becomes a meteorite when it
(A) impacts the surface of a planet. (B) encounters the atmosphere of a planet. (C) makes a complete orbit around a planet. (D) starts to burn up in the atmosphere of a planet.
answer:
A

question:
Sharpening a pencil and tearing paper are examples of physical changes. Which statement describes why these are physical changes?
(A) There is a change in how the objects are used. (B) There is a change in the appearance of the objects. (C) There is a change in the materials from which the objects are made. (D) There is a change in both the appearance of the objects and the materials from which they are made.
answer:
B

question:
Air pollution can influence a person's quality of life. Which best identifies the influence of air pollution?
(A) It is a behavioral influence. (B) It is a genetic influence. (C) It is an environmental influence. (D) It is a dietary influence.
answer:
C