A) A coal burning generator B) A gasoline burning automobile C) An automobile that operates on fuel cells D) A wood burning stove
A) Running water B) The sun C) Heat from within the Earth's crust D) The moon
A) The number of clouds in the sky B) The state of the atmosphere at any particular time C) The speed of the wind D) The amount of moisture in the air
A) Rotation B) Magnetic Field C) Temperature D) Atmosphere
A) The sun protects life on Earth B) The sun causes plants to wither and die C) The sun damages life on Earth D) The sun powers life on Earth
A) The Earth's changing distance from the sun B) Changes in the sun's intensity C) The tilt of the Earth on it's axis D) The Earth's rotation
A) Because it reflects sunlight B) It reflects light from Earth C) It makes it's own light D) It reflects light from stars
A) High plateaus B) Deep craters C) Mountains D) Sunken plains, or seas
A) Light B) Motion C) Electricity D) Heat
A) Temperature and pressure B) Motion and time C) Wind and rain D) Lift and thrust |