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