You are presented with the question "What means a change from a liquid into a gas by adding heat energy?" and the following answer choices: - Evaporation of water - heat is produced - violent evolution of bubbles - igniting fuel and oxidiser - Water expanding - a hemisphere is tilted away from the sun - evaporative cooling - degrees Celsius Now knowing that boiling means change from a liquid into a gas by adding heat energy and boiling is the very rapid conversion of a liquid into vapor by the violent evolution of bubbles, choose the best answer.
violent evolution of bubbles

You are presented with the question "Friction causes a car to what?" and the following answer choices: - renew energy - to move people - increase velocity - imbalanced - squeeze - lose energy - speed up - contracting Now knowing that friction causes an object to lose energy and for example, the word Car refers to a type of object, so Car is a class, choose the best answer.
lose energy

You are presented with the question "What does sugar turn into to create ethanol?" and the following answer choices: - Joules - Alcohol - Pie - Cotton Candy - emissions - Energy - heat - Chocolate Now knowing that ethanol is produced by alcoholic fermentation of the glucose in corn or other plants and fermentation is the chemical change of sugar to alcohol, choose the best answer.
Alcohol

You are presented with the question "What can warm the earth?" and the following answer choices: - evaporation - burning fossil fuels - our nearest star - rain - electromagnetic energy - nuclear fusion - heat energy - magma Now knowing that burning fossil fuels increases the carbon in the atmosphere and increased atmospheric carbon dioxide increases greenhouse effect and warms the earth, choose the best answer.
burning fossil fuels