Ques:If hearing is used for sensing vibrations by animals, then hearing is used for sensing _ by animals? Answer choices: - A Greek letter - waves - vibrations - motion - messengers - humans - four limbs - some mammals

Ans:vibrations
-----
Ques:If bacteria are able to increase the amount of nutrients in the soil, then what are able to increase the amount of nutrients in the soil? Answer choices: - Frogs - farms - mussels - bacteria - clams - plants - acid rains - tractors

Ans:bacteria
-----
Ques:If aswitch is used to complete an electrical circuit, then what is a purpose of a switch in an electrical circuit? Answer choices: - to reduce magnetic effects - heat production - to annihilate electrons - preventing heat transfer - direct energy - to complete the circuit - heat is produced - to circumvent resistors

Ans:to complete the circuit
-----
Ques:If adding something from the ocean to a liquid decreases the melting point of that liquid, then what can be added to a liquid to decrease the melting point of the liquid? Answer choices: - kinetic energy - energy of moving objects - Sulfur dioxide - fossil fuels - Chemical energy - activation energy - aqueous solution - Something from an ocean

Ans:
Something from an ocean
-----