Answer the following question given this paragraph: Food chains carry energy from producers (autotrophs) to consumers (heterotrophs). 99% of energy for life comes from the sun via photosynthesis. Note that only nutrients recycle. Energy must continue to flow into the system. Though this food chains "ends" with decomposers, do decomposers, in fact, digest matter from each level of the food chain? (See the Energy Transfer: Decomposers (Advanced) concept). Q: Food chains carry energy from what group to what group? Choices: - consumers to producers - decomposers to producers - refiners to consumers - producers to consumers A:
producers to consumers
------
Answer the following question given this paragraph: Q: Excretory organs that conserve what essential substance help terrestrial animals to avoid desiccation? Choices: - metabolytes - air - food - water A:
water
------
Answer the following question given this paragraph: Minerals that are not just a single element are made of chemical compounds. For example, the mineral quartz is made of the compound silicon dioxide, or SiO 2 . This compound has one atom of the element silicon for every two atoms of the element oxygen. Q: Minerals that are not compounds consist of a single what? Choices: - electron - gas - proton - element A:
element
------
Answer the following question given this paragraph: If water gets hot enough, it starts to boil. Bubbles of water vapor form in boiling water. This happens as particles of liquid water gain enough energy to completely overcome the force of attraction between them and change to the gaseous state. The bubbles rise through the water and escape from the pot as steam. Q: When water particles become hot enough to overcome the force of attraction between them, what happens to the water? Choices: - it freezes - it pools - it evaporates - it boils A:
it boils
------