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