(Question)
Q: Near-earth asteroids cross paths with earth, meaning they could collide; what are the paths called? Choices: - trajectory - curves - galaxies - orbits A:
(Answer)
orbits

(Question)
Q: What are hydrocarbons with double bonds called? Choices: - aldehydes - alcohols - amines - alkenes A:
(Answer)
alkenes

(Question)
Q: What is the term for the measure of a fluid's thickness? Choices: - friction - elasticity - salinity - viscosity A:
(Answer)
viscosity