Q: What are the three types of rocks? Read this paragraph and choose the correct option from the provided answers: You learned about the three rock types: igneous, sedimentary, and metamorphic. You also learned that all of these rocks can change. In fact, any rock can change to become any other type of rock. These changes usually happen very slowly. Some changes happen below Earth's surface. Some changes happen above ground. These changes are all part of the rock cycle. The rock cycle describes each of the main types of rocks, how they form, and how they change. Choices: - igneous, sedimentary, mixed - igneous, orbital, metamorphic - opaque , sedimentary , metamorphic - igneous, sedimentary, metamorphic A:
igneous, sedimentary, metamorphic

Q: What forms when water vapor condenses around particles in the air? Read this paragraph and choose the correct option from the provided answers: Clouds form when water vapor condenses around particles in the air. The particles are specks of matter, such as dust or smoke. Billions of these tiny water droplets come together to make up a cloud. If the air is very cold, ice crystals form instead of liquid water. Choices: - wind - storms - humididty - clouds A:
clouds

Q: What are electrons in the outer energy level of an atom called? Read this paragraph and choose the correct option from the provided answers: The electrons in the outer energy level of an atom are called valence electrons . It is valence electrons that are potentially involved in chemical reactions. The number of valence electrons determines an element's reactivity, or how likely the element is to react with other elements. The number of valence electrons also determines whether the element can conduct electric current. That's because electric current is the flow of electrons. Table below shows how these properties vary in elements from each class. Choices: - shell electrons - outer electrons - positive electrons - valence electrons A:
valence electrons

Q: What is heard when sound waves bounce back from a surface that they can't pass through? Read this paragraph and choose the correct option from the provided answers: Did you ever hear an echo of your own voice? An echo occurs when sound waves bounce back from a surface that they can't pass through. The woman pictured here is trying to create an echo by shouting toward a large building. When the sound waves strike the wall of the building, most of them bounce back toward the woman, and she hears an echo of her voice. An echo is just one example of how waves interact with matter. Choices: - radio - ultrasound - loop - echo A:
echo