You are presented with the quiz "powering an electrical device with a battery requires a path for electrons to what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "powering an electrical device with a battery requires a path for electricity to flow through a closed circuit" and "electrons flow continuously in a closed circuit". So, what's the best answer to the question?
OPTIONS:
- hydrogen and oxygen
- spread out
- electromagnetic energy
- cut the line
- flow continuously
- an electron microscope
- flood
- kinetic energy
flow continuously
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You are presented with the quiz "Smoke is a product of what being burned?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "afire requires oxygen to burn" and "smoke from fires contains heat and the products of burning". So, what's the best answer to the question?
OPTIONS:
- an object
- oxygen
- engines
- trees
- Oak
- energy
- Cooking
- Cars
oxygen
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You are presented with the quiz "evaporation causes what to form in the atmosphere" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "clouds are formed by water vapor rising into colder regions of the atmosphere and condensing" and "eVAPORATION Water changing into vapor and rising into the air". So, what's the best answer to the question?
OPTIONS:
- a solute
- sunlight
- carbon dioxide molecules
- clouds
- solar radiation
- high pressure areas
- heat
- energy
clouds
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You are presented with the quiz "How are atolls built?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "many corals secrete an exoskeleton that builds up to become a coral reef" and "an atoll is the third type of reef". So, what's the best answer to the question?
OPTIONS:
- important habitats
- By coral exoskeletons
- by fish
- with machines
- by a type of eel
- It used to be covered by water
- The area was once underwater
- reusing materials
By coral exoskeletons
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