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