Q: The high points of a transverse wave are called what? Choices: - ridges - valleys - points - crests A:
crests

Q: What kind of a reaction occurs when a substance reacts quickly with oxygen? Choices: - invention reaction - Fluid Reaction - nitrogen reaction - combustion reaction A:
combustion reaction

Q: Q: Different isotopes of an element have different mass numbers because they have different numbers of what? Choices: - protons - electrons - nuclei - neutrons A:
A: neutrons

Question: Q: When cardiac muscle contracts, the heart does what? Choices: - cardiac arrest - irregular heartbeat - heart murmur - pumps blood A:
Answer: pumps blood

*Question*
Q: What is the goal of science? Choices: - improve knowledge - improve life expectancy - gain scholarships - increase knowledge A:
**Answer**
increase knowledge

(Question)
Q: Line graphs are especially useful for showing changes over what? Choices: - space - energy - velocity - time A:
(Answer)
time