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