Adrought can change the color of an environment from green to brown, and too little rain causes a drought. Given these facts, too little of what can change the color of an environment from green to brown among the following options: - pool water - energy - bath water - Acids - algae - heat - water hose - rain
rain

An automobile engine transforms chemical energy into mechanical energy, and rocket engines are reaction engines. Given these facts, what powers rockets among the following options: - supersonic - a hydraulic system - sun's heat - Mechanical energy - direct energy - fossil fuels - hydrogen and oxygen - electromagnetic energy
Mechanical energy

Harming an animal species causes that animal 's population to decrease, and killing snakes is more than unnecessary and harmful to the ecosystem. Given these facts, what can killing snakes cause among the following options: - Snake population decrease. - DNA damage and mutations - Snake population variation. - death and devastation - dead organisms - Snake population increase. - Destroy crops - Snake population stabilization
Snake population decrease.

Cold fronts cause thunderstorms as they pass by, and if cold air is advancing on warm air, the front is called a cold front. Given these facts, where do thunderstorms come from among the following options: - Too much rain in the clouds - When the environment is too cold - Earth's axis of rotation is tilted - fissures of hot, acidic water - More than one trophic level. - it flows to a lower level - Dryness in the environment - When cold air advances on warm air
When cold air advances on warm air