Which best describes the purpose of food?

How would the absence of sunlight affect a plant's ability to grow?

What are the products of cellular respiration?

Which contains nitrogen and is obtained from the food they ingest?

When an organism oxides food, some of the energy is lost. Which best explains the loss of energy?

Jerome mixes two clear liquids together and observes the clear liquids turn cloudy white. Based on his observations, which most likely occurred?

Which is indicated if a gas forms when two or more substances are mixed?

Which best represents a physical change?

A piece of paper burns, producing heat and light. Which best describes the process of burning?

The following chemical reaction occurs. (2H2O2 → 2H2O + O2) How many atoms of hydrogen are involved in the reaction?

A piece of paper has a mass of 17 grams. When the paper is burned, a chemical change occurs, and both smoke and ashes are produced. Based on the law of conservation of mass, which statement is true?

Two substances react and the mass is recorded. The mass of the products does not equal the mass of the reactants. Which is the best explanation for the difference in the masses?

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