Fact 1: Aswitch is used to start the flow of current in an electrical circuit.  Fact 2: Electricity flows when a circuit is complete.  Given the two facts above, answer the question "What is a purpose of a switch in an electrical circuit?" with the following options:  - to reduce magnetic effects  - heat production  - to annihilate electrons  - preventing heat transfer  - direct energy  - to complete the circuit  - heat is produced  - to circumvent resistors
to complete the circuit

Fact 1: Breathing is when a gill converts from oxygen in water into oxygen in blood.  Fact 2: Hemoglobin transports oxygen in blood.  Given the two facts above, answer the question "Breathing is when a gill converts from oxygen in water into" with the following options:  - tiny polyps  - Hemoglobin  - salmon  - motility  - unidirectional  - exoskeleton  - heat energy  - epidermal
Hemoglobin

Fact 1: An aquatic animal requires great amounts of water to survive.  Fact 2: Too much algae can deplete the water of oxygen, making it impossible for aquatic animals to survive.  Given the two facts above, answer the question "an aquatic animal requires not having too much what in water?" with the following options:  - warmth  - Energy.  - energy  - fats  - algae  - matter  - harm  - sodium
algae

Fact 1: Adoorbell converts electrical energy into sound.  Fact 2: Hearing is the act of perceiving sound.  Given the two facts above, answer the question "What converts electrical energy into what we hear?" with the following options:  - a doorbell  - sensory neurons  - a solar panel  - a battery  - Firecrackers  - waves  - a water pump  - engines
