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