Q: Answer the following question given this paragraph: Steam actually consists of tiny droplets of liquid water. What you can't see in the picture is the water vapor that is also present in the air above the spring. Water vapor is water in the gaseous state. It constantly rises up from the surface of boiling hot water. Why? At high temperatures, particles of a liquid gain enough energy to completely overcome the force of attraction between them, so they change to a gas. The gas forms bubbles that rise to the surface of the liquid because gas is less dense than liquid. The bubbling up of the liquid is called boiling. When the bubbles reach the surface, the gas escapes into the air. The entire process in which a liquid boils and changes to a gas that escapes into the air is called vaporization . You can watch an animation of the process at this URL: http://www. visionlearning. com/img/app/library/objects/Flash/VLObject-321-030317040343. swf. Q: Steam actually consists of tiny droplets of liquid what? Choices: - lead - methane - mercury - water A:
A: water

Q: Answer the following question given this paragraph: Q: In human females, the mammary glands are associated with, but not part of, what organ system that is used to create new humans? Choices: - immune - digestive - endocrine - reproductive A:
A: reproductive

Q: Answer the following question given this paragraph: Condensation changes water vapor to liquid water. As air rises higher into the atmosphere, it cools. Cool air can hold less water vapor than warm air. So some of the water vapor condenses into water droplets. Water droplets may form clouds. Q: What changes water vapor to liquid water? Choices: - fermentation - global warming - combustion - condensation A:
A: condensation

Q: Answer the following question given this paragraph: In the 1920s, physicists discovered that electrons do not travel in fixed paths. In fact, they found that electrons only have a certain chance of being in any particular place. They could only describe where electrons are with mathematical formulas. That's because electrons have wave-like properties as well as properties of particles of matter. It is the "wave nature" of electrons that lets them exist only at certain distances from the nucleus. The negative electrons are attracted to the positive nucleus. However, because the electrons behave like waves, they bend around the nucleus instead of falling toward it. Electrons exist only where the wave is stable. These are the orbitals. They do not exist where the wave is not stable. These are the places between orbitals. Q: Electrons exist only where the wave is what? Choices: - seen - spinning - solid - stable A:
A: stable