Ques: Q: When solids change to gasses, they generally pass through what other state? Read this paragraph and choose the correct option from the provided answers: Solids that change to gases generally first pass through the liquid state. However, sometimes solids change directly to gases and skip the liquid state. The reverse can also occur. Sometimes gases change directly to solids. Choices: - chemical - frozen - carbon - liquid A:
Ans: liquid

Ques: Q: Friction causes the molecules on rubbing surfaces to move faster, which produces what? Read this paragraph and choose the correct option from the provided answers: You know that friction produces heat. That's why rubbing your hands together makes them warmer. But do you know why the rubbing produces heat? Friction causes the molecules on rubbing surfaces to move faster, so they have more heat energy. Heat from friction can be useful. It not only warms your hands. It also lets you light a match (see Figure below ). On the other hand, heat from friction can be a problem inside a car engine. It can cause the car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts and makes them slippery so there is less friction. Choices: - life - precipitation - cold - heat A:
Ans: heat

Ques: Q: What two forces tend to keep an animal stationary and thus oppose locomotion? Read this paragraph and choose the correct option from the provided answers: Choices: - workload and gravity - thickness and gravity - stength and gravity - friction and gravity A:
Ans: friction and gravity

Ques: Q: What system of the body is generally responsible for breathing? Read this paragraph and choose the correct option from the provided answers: The respiratory system is responsible for breathing. Choices: - excretory - integumentary - cardiac - respiratory system A:
Ans:
respiratory system