Plants make their own carbohydrates, proteins, and fats. Where do they get the energy needed to make these substances?

a carbon dioxide

b the Sun

c plant food

d soil and water

A county commissioner wants to reduce the amount of waste sent to the local landfill. Which of the following would result in the greatest reduction of waste.

Why do we need the periodic table? First to answer get brainless!

Suppose you find yourself teetering on the edge of a cliff or the roof of a tall building with a heavy physics book in your hand. As you are about to fall, you suddenly remember how physics can save you! What law did you remember?

Which of the following statements are true regarding electric generators? Check all that apply. Check all that apply. An electric generator converts mechanical energy into electrical energy.

When warm air collides with cold air and droplets are formed it is called?

In what state do hydrogen and helium exist in a star

13) The frequency of a vibrating string varies inversely as its length. A string 3 feet long vibrates 175 cycles per second. Find the frequency of a 5 foot string.

Match the following. 1. energy a push or a pull 2. mechanical energy energy of a moving object 3. kinetic energy a force directed away from an object 4. heat the ability to do work 5. work a force moving an object through a distance 6.

Scientists hypothesize that oxygen began to accumulate in earth's atmosphere of living things with the ability to?

The 3 stages of the water cycle are