Heating an egg causes a chemical reaction in the egg, and chemical changes are a result of chemical reactions. Given these facts, heating an egg results in chemical _. among the following options: - Energy. - voltage - synergy - burns - chains - heat - changes - energy
changes

Intense heat has a negative impact on an organism, and fire has intense heat. Given these facts, what has a negative impact on an organism among the following options: - cancer - food - Herpes - reproduction - fire - rabies - HIV - water
fire

Threatening behavior by predators causes a porcupine to extend its quills, and puffers are smooth skinned while Porcupines have the characteristic spines or quills. Given these facts, what does a porcupine do with its spines when it's threatened among the following options: - killing insects - Shoot them - kill them - protect them - Extend them - Shed them - Retract them - behave
Extend them

All chemical reactions require activation energy to get started, and chemical changes are referred to as a chemical reaction. Given these facts, what require activation energy to get started among the following options: - changing colors - chemical additions - reacting colors - Firecrackers - an engine - heating liquids - Organic compounds - chemical changes
chemical changes