Answer the following question given this paragraph: A geologic map shows the different rocks that are exposed at the surface of a region. Rock units are shown in a color identified in a key. On the geologic map of the Grand Canyon, for example, different rock types are shown in different colors. Some people call the Grand Canyon "layer cake geology" because most of the rock units are in layers. Rock units show up on both sides of a stream valley. Q: What are the three main types of rocks? Choices: - limestone , igneous and metamorphic - plutonic, igneous and metmorphic - crystalline , igneous and metamorphic - sedimentary, igneous and metamorphic A:
sedimentary, igneous and metamorphic
(Question)
Answer the following question given this paragraph: The stomach also releases a very strong acid, called hydrochloric acid. This acid kills most pathogens that enter the stomach in food or water. Urine is also acidic, so few pathogens can grow in it. Q: What is the acid that is released by the stomach that kills most pathogens that enter the stomach? Choices: - Nitric Acid - Hydrofluoric Acid - Sulfuric Acid - hydrochloric acid A:
(Answer)
hydrochloric acid
Ques: Answer the following question given this paragraph: Q: Pyramids of net production and biomass reflect what level of efficiency? Choices: - high - medium - extreme - low A:
Ans: low
(Q).
Answer the following question given this paragraph: The focal length , , of a lens or mirror is the distance from the surface of the lens or mirror to the place where the light is focused. This is called the focal point or focus . For diverging lenses or mirrors, the focal length is negative. Q: What type of lens and mirrors have a negative focal length? Choices: - converging - convexing - subverging - diverging A:
(A).
diverging
Ques:Answer the following question given this paragraph: Catalysts are not reactants, but they help reactants come together so they can react. You can see one way this happens in the animation at the URL below. By helping reactants come together, a catalyst decreases the activation energy needed to start a chemical reaction. This speeds up the reaction. Q: A catalyst decreases the amount of what resource that is required in order to begin a chemical reaction? Choices: - positive energy - motion energy - kinetic energy - activation energy A:

Ans:activation energy
Answer the following question given this paragraph: Heat is the exchange of energy from one part of the universe to another. Heat and energy have the same units. Q: What is the exchange of energy from one part of the universe to another called? Choices: - cold - temperature - humidity - heat A:
heat