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