Which of these is a renewable resource?
What is the process of plants releasing water vapor into the air called?
Which of these is NOT a type of cloud?
What is the unit of measurement for temperature?
Which of these is a nocturnal animal?
What is the process by which water returns to Earth's surface as rain, snow, or sleet?
Which of these is a primary color?
What is the process of liquid changing into a solid called?
Which of these is a source of artificial light?
What is the outer layer of the Earth called?