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