Answer the following question given this paragraph: The direction of the force of gravity is in a straight line between two objects. It is always attractive. Q: The direction of the force of gravity is in what direction? Choices: - staggered line - curved line - fragmented line - straight line A:
straight line
Answer the following question given this paragraph: Q: What are changes in membrane potential that vary continuously with the strength of a stimulus are known as? Choices: - reverse potentials - variable potentials - kinetic energy - graded potentials A:
graded potentials
Q: Answer the following question given this paragraph: A: Some animals can see light in the infrared or ultraviolet range of wavelengths. For example, mosquitoes can see infrared light, which is emitted by warm objects. By seeing infrared light, mosquitoes can tell where the warmest, blood-rich areas of the body are located. Q: What type of light can mosquitoes see? Choices: - trichina - neon - spicule - infared A:
A: infared
Question: Answer the following question given this paragraph: Selective precipitation can also be used in qualitative analysis. In this method, reagents are added to an unknown chemical mixture in order to induce precipitation. Certain reagents cause specific ions to precipitate out; therefore, the addition of the reagent can be used to determine whether the ion is present in the solution. Q: In qualitative analysis, reagents are added to an unknown chemical mixture in order to induce what? Choices: - motion - sunlight - erosion - precipitation A:
Answer: precipitation
*Question*
Answer the following question given this paragraph: During a massive eruption all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations like the picture in Figure below . Q: After a massive eruption what will a mountain collapsing above an empty chamber create? Choices: - crater - cavern - valley - caldera A:
**Answer**
caldera
*Question*
Answer the following question given this paragraph: These people may be having fun in the icy water, but their bodies are struggling to react to the cold. For example, they may begin to shiver. Shivering helps the body return to a stable temperature. The body is always working to achieve stability, or homeostasis. Q: Shivering helps the body return to a stable what? Choices: - pH level - weight - mood - temperature A:
**Answer**
temperature