Physical Science Chapter 9 Lesson 4 Questions

What is the primary source of energy for a runner?

• Sunlight

• Water

• Food

• Air

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Unlike plants, a runner must get energy from ______.

• sunlight

• water

• food

• air

What are the products when fats burn in a lamp?

• Oxygen and water

• Carbon dioxide and water

• Carbon dioxide and oxygen

• Water and light.

In the cells of organisms, a more controlled version of the process releases energy stored in _______.

• atoms

• molecules

• cells

• tissues

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Which of the following statements is true about reactions in cells?

• All reactions go to completion.

• Some reactions reach an equilibrium point.

• No reactions occur in solution.

• Energy is not transferred.

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In cellular reactions, energy is _______ and converted from one form to another.

• destroyed

• transferred

• created

• lost

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What energy conversion takes place during photosynthesis?

• Chemical to light

• Light to chemical

• Mechanical to chemical

• Light to mechanical

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During photosynthesis, energy from sunlight is converted into ________ energy.

• mechanical

• thermal

• chemical

• electrical

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What is the primary source of energy for most plants and animals?

• The moon

• The sun

• The ocean

• The soil

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During photosynthesis, plants chemically combine carbon dioxide and water into _______.

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

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