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