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