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