If alight bulb requires energy to produce light, then what requires energy to produce light? Answer choices: - humans - an object - gasoline - tulip bulb - to move people - light bulb - microscope - cactuses
light bulb

If the immune system is a defense against harmful particles from entering the body, then the what is a defense against harmful particles from entering the body? Answer choices: - lungs - It remains dormant - A virus - immune system - exoskeleton - pancreas - chickenpox - liver
immune system

If condensation causes rain to form, then what does condensation cause? Answer choices: - water - emptiness - sandstorms - guilt - heat - rain - gas - H20
rain

If the movement of an air mass over the world's surface causes local weather changes, then what does the movement of air mass over the world's surface cause? Answer choices: - Temperature - global warming - colder weather - local weather changes - Plant growth is reduced - earthquakes - no weather changes - constant clear weather
local weather changes