If chemical changes can be used to kill existing microorganisms in the food, then what can be used to kill existing microorganisms in food? Answer choices: - chemical changes - Dehydration - deoxyribonucleic acid - bacteria - an electron microscope - hydration - electromagnetic energy - single-celled organisms
chemical changes

If electric cars require a path for electricity to flow through a closed circuit, then an electric car requires what to operate? Answer choices: - radiation shielding - hydrogen and oxygen - electromagnetic energy - gasoline - direct energy - heat energy - a closed circuit - oxygen
a closed circuit

If water flow through soil is variable, then what is the rate of water flow of soil? Answer choices: - salinity - variable - heat energy - reduce - streams. - streams - down - evaporation
variable