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