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