Question: Q: What term is used for the difference in the placement of an object from one time to another? Read this paragraph and choose the correct option from the provided answers: Position is the location of the object (whether it's a person, a ball or a particle) at a given moment in time. Displacement is the difference in the object's position from one time to another. Distance is the total amount the object has traveled in a certain period of time. Displacement is a vector quantity (direction matters), where as distance is a scalor (only the amount matters). Distance and displacement are the same in the case where the object travels in a straight line and always moving in the same direction. Choices: - variation - replacement - diffusion - displacement A:
Answer: displacement

Question: Q: The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil? Read this paragraph and choose the correct option from the provided answers: The stability of an ecosystem depends on the actions of the decomposers. Examples of decomposers include mushrooms on a decaying log. Bacteria in the soil are also decomposers. Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients. The carbon and nitrogen necessary to build organic compounds, and then cells, allowing an organism to grow, would be insufficient. Other nutrients necessary for an organism to function properly would also not be sufficient. Essentially, many organisms could not exist. Choices: - whitefly - fluxes - aphids - decomposers A:
Answer: decomposers

Question: Q: The temperature of the box is related to the average speed of what? Read this paragraph and choose the correct option from the provided answers: The temperature of the box is related to the average speed of the molecules. Use momentum principles to relate temperature to pressure. Explain conceptually, in words rather than with equations. Choices: - air - light - earth - molecules A:
Answer:
molecules