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