You are presented with the question "What does nitrogen do when it's heated" and the following answer choices: - Expands - boiling - moves - Solidifies - Melts - heat - burning - Condenses Now knowing that if gas is heated then that gas will expand and nitrogen gas is the most abundant gas in the atmosphere, choose the best answer.
Expands
(Question)
You are presented with the question "What is used to heat a building by a heating system?" and the following answer choices: - engines - wind - insulation - photons - radiator - body heat - calcite - ice Now knowing that energy is used for heating a building by a heating system and radiators are used to heat the building, The energy source is oil, choose the best answer.
(Answer)
radiator
Ques: You are presented with the question "What determines the amount of daylight earth gets? " and the following answer choices: - Heat energy - The darkness it gets - The bending of a ray of light - The tilt of the axis - The tilt of the sun's axis - electromagnetic energy - The brightness of the earth - rain or sun shine Now knowing that when the seasons change from the summer to the fall , the amount of daylight will decrease and seasons are caused by the tilt of the earth's axis, choose the best answer.
Ans: The tilt of the axis
(Q).
You are presented with the question "What is the result of imperfect passing of heat through a metal, on that metal?" and the following answer choices: - contamination - expansion - sweating - Energy. - forces - burning - Evaporation - electricity Now knowing that when metal conducts heat , that metal expands and conduction is the passing of heat through a medium, choose the best answer.
(A).
expansion
Ques:You are presented with the question "what can tidal energy be used to produce?" and the following answer choices: - energy - engines - offspring - waves - currents - adding heat - moon units - precipitation Now knowing that tidal energy can be used to produce electricity and electricity travels in currents, choose the best answer.

Ans:currents
Ques:You are presented with the question "What has a negative impact on an ecosystem?" and the following answer choices: - massive damage - Pesticides - good weather - Destroy bridges - planting trees - normal water levels - deforestation - cutting down oaks Now knowing that cutting down trees has a negative impact on an ecosystem and oak trees are so strong, choose the best answer.

Ans:
cutting down oaks