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