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