Practice check: Choose the correct environmental science answer: what is an ecosystem?

✅ B. Red blood cells

a: Platelets | b: Red blood cells | c: Plasma proteins | d: White blood cells Read more

✅ B. The Sun

a: The Moon | b: The Sun | c: Earth's core alone | d: Tides alone Read more

✅ A. Sugar

✅ C. Sodium Chloride

✅ B. Evaporation

a: Condensation | b: Evaporation | c: Deposition | d: Freezing Read more

✅ B. The variety of living organisms in an area or on Earth

a: The amount of traffic only | b: The variety of living organisms in an area or on Earth | c: A type of fossil fuel | d: The height of a mountain Read more

✅ C. 7

a: 14 | b: 1 | c: 7 | d: 4 Read more

✅ B. Mercury and Bromine