If heating an egg results in chemical changes, then heating an egg results in chemical _.? Answer choices: - Energy. - voltage - synergy - burns - chains - heat - changes - energy
changes

If fire has a negative impact on an organism, then what has a negative impact on an organism? Answer choices: - cancer - food - Herpes - reproduction - fire - rabies - HIV - water
fire

If aporcupine will extend its spines when threatened, then what does a porcupine do with its spines when it's threatened? Answer choices: - killing insects - Shoot them - kill them - protect them - Extend them - Shed them - Retract them - behave
Extend them

If chemical changes require activation energy to get started, then what require activation energy to get started? Answer choices: - changing colors - chemical additions - reacting colors - Firecrackers - an engine - heating liquids - Organic compounds - chemical changes
chemical changes