(Q).
Q: What type of reaction causes two substances to combine to make a single substance? Choices: - component reaction - spontaneous mutation - metabolism - composition reaction A:
(A).
composition reaction

(Q).
Q: What occurs when force is applied to a moving object? Choices: - stimulation - inertia - transmission - acceleration A:
(A).
acceleration

(Q).
Q: In studying energy, what term do scientists use to refer to the matter and its environment involved in energy transfers? Choices: - molecule - ecosystem - world - system A:
(A).
system