Ques:Answer the following question given this paragraph: A given liquid will evaporate more quickly when it is heated. This is because the heating process results in a greater fraction of the liquid's molecules having the necessary kinetic energy to escape the surface of the liquid. The Figure below shows the kinetic energy distribution of liquid molecules at two temperatures. The numbers of molecules that have the required kinetic energy to evaporate are shown in the shaded area under the curve at the right. The higher temperature liquid (T 2 ) has more molecules that are capable of escaping into the vapor phase than the lower temperature liquid (T 1 ). Q: Because heating results in a greater fraction of molecules having the necessary kinetic energy to escape the surface of the liquid, what occurs more quickly when liquid is heated? Choices: - oxidation - expansion - absorption - evaporation A:

Ans:evaporation
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Ques:Answer the following question given this paragraph: Q: Arteries carry oxygenated blood away from the heart, what carries un-oxygenated blood back to the heart? Choices: - glands - intestines - lungs - veins A:

Ans:veins
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Ques:Answer the following question given this paragraph: Protozoa generally feed by engulfing and digesting other organisms. As consumers, they have various roles in food chains and webs. Some are predators. They prey upon other single-celled organisms, such as bacteria. In fact, protozoa predators keep many bacterial populations in check. Other protozoa are herbivores. They graze on algae. Still others are decomposers. They consume dead organic matter. There are also parasitic protozoa that live in or on living hosts. For example, the protozoan that causes malaria lives inside a human host. For their part, protozoa are important food sources for many larger organisms, including insects and worms. Q: What single-celled organism can be either a predator, decomposer, herbivore, or parasite in the food chain? Choices: - vertebrates - mites - Diatoms - protozoa A:

Ans:protozoa
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Ques:Answer the following question given this paragraph: Contact metamorphism occurs when a rock is altered by heat from a nearby magma. Q: When a rock is altered by heat from a nearby magma, what occurs? Choices: - sublimation - evaporation - form metamorphism - contact metamorphism A:

Ans:
contact metamorphism
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