Q: Q: At the earth's surface, the air pressure exerted on you is a result of the weight of what above you? Choices: - magnetic force - humidity - water - air A:
A: air

Q: Q: Gases on earth originated from comets and what events? Choices: - supernovas - black holes - tides - volcanic eruptions A:
A: volcanic eruptions

Q: Q: The rate of a reaction can be expressed either in terms of the decrease in the amount of what or the increase in the amount of a product per unit time? Choices: - plasma - sulfate - isotope - reactant A:
A: reactant

Q: Q: What is the movement of fluid out of the capillaries called? Choices: - diffusion - absorption - osmosis - filtration A:
A: filtration