Answer the following question given this paragraph: Most of the time, you breathe without thinking about it. Breathing is mostly an involuntary action that is controlled by a part of your brain that also controls your heart beat. If you swim, do yoga, or sing, you know you can control your breathing, however. Taking air into the body through the nose and mouth is called inhalation . Pushing air out of the body through the nose or mouth is called exhalation . The woman pictured below is exhaling before she surfaces from the pool water ( Figure below ). Q: What is the term for expelling air out of the body through the nose or mouth? Choices: - induction - inhalation - perspiration - exhalation A:
exhalation

Answer the following question given this paragraph: The halogens are among the most reactive of all elements, although reactivity declines from the top to the bottom of the halogen group. Because all halogens have seven valence electrons, they are "eager" to gain one more electron. Doing so gives them a full outer energy level, which is the most stable arrangement of electrons. Halogens often combine with alkali metals in group 1 of the periodic table. Alkali metals have just one valence electron, which they are equally "eager" to donate. Reactions involving halogens, especially halogens near the top of the group, may be explosive. You can see some examples in the video at the URL below. ( Warning: Don't try any of these reactions at home!). Q: In which order does the reactivity of halogen group decline? Choices: - bottom to top - right to left - left to right - top to bottom A:
top to bottom

Answer the following question given this paragraph: Every surface has microscopic bumps, lumps, and imperfections, emphasized as in the image above. If we try to slide the top block over the lower block, there will be numerous collisions as the bumps impact each other. The forward motion causes the collisions with bumps which then exert a force in opposite way the block is moving. The force of friction always opposes whatever motion is causing the friction. Q: What force is caused by microscopic bumps, lumps, and imperfections colliding? Choices: - gravitational - motion - tension - friction A:
friction

Answer the following question given this paragraph: Q: What releases fatty acids and other components from fats and phospholipids? Choices: - metabolism - enzyme respiration - peristaltic hydrolysis - enzymatic hydrolysis A:
enzymatic hydrolysis