Q: If air helps cells survive, then what helps cells survive? Answer choices: - DNA - all copper - air - space - RNA - coat - heat - gasoline
A: air

Q: If being exposed to wind can cause Desertifcation, then being exposed to wind can cause? Answer choices: - Pollution - deforestation - flooding - hyrdation - contamination - isolate - Desertification - scattered light
A: Desertification

Q: If temperature changes can cause a solid to melt into a liquid, then with a change in temperature, what does a solid become? Answer choices: - an object - liquid - moves - a new compound - support - solid phase - glass - crystallized
A: liquid

Q: If to ensure that water is safe to drink harmful substances are removed before drinking, then to ensure that water is safe to drink, harmful what are removed before drinking? Answer choices: - leeches - seeds - toxins - currents - bacteria - substances - Roundworms - plants
A: substances