HMH Book C Lesson 2

What starting materials do plants use to make food?

• soil and water

• water and oxygen

• carbon dioxide and water

• carbonic acid and nitrogen

What is the source of energy for plant and animal cells?

• soil

• oxygen

• consumers

• carbon-based molecules

What are the products of photosynthesis?

• glucose and oxygen

• carbon dioxide and water

• chlorophyll, protein, and DNA

• plant stems, leaves, and root systems

Animals breathe in oxygen and breathe out carbon dioxide. Where does the carbon dioxide come from?

• A. it is produced during photosynthesis

• B. it is a product of cellular respiration

• C. it is needed to create energy for cells

• D. it is created when plants are consumed

There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. What products of photosynthesis are starting materials for cellular respiration?

• A. energy and carbon

• B. glucose and oxygen

• C. carbon dioxide and water

• D. chlorophyll and chloroplasts

Why are animals important to the process of photosynthesis?

• A. Animals eat plants, which makes space for more plants to grow.

• B. Animals digest food, which provides the starting materials for photosynthesis.

• C. Animals release carbon dioxide, which provides the starting materials for photosynthesis.

• D. Animals produce energy in the form of heat, which is necessary for photosynthesis to occur.

Two important processes that cells use are photosynthesis and cellular respiration. Describe these two processes. SELECT ALL THAT APPLY

• photosynthesis is the process used to obtain energy from the sun. It makes food for plants. 6CO2 + 6H2O + light energy --> C6H12O6 + 6O2

• Cellular respiration: breaks down food and stores energy. It releases carbon dioxide. C6H12O6+6O2---> 6CO2+6H2O+ATP

• Photosynthesis: breaks down food and stores energy. It releases carbon dioxide. C6H12O6+6O2---> 6CO2+6H2O+ATP

• Cellular respiration is the process used to obtain energy from the sun. It makes food for plants.6CO2 + 6H2O + light energy --> C6H12O6 + 6O2

• All of the above

The picture shows the process of photosynthesis. One of the products of photosynthesis is not shown in the diagram.

What is the missing product? Describe the role of this substance in plant cells. Answer both parts in one complete sentence.

Answer explanation

The missing product is glucose. Sugar is used in life processes for the plant.

Fossil fuels come from decomposed plants and animals that were buried in the ground millions of years ago.

Explain why burning fossil fuels releases carbon dioxide. SELECT ALL THAT APPLY.

• Plants and animals died and decomposed and were eventually buried. over time they became fossil fuels.

• The bodies of living organisms are made up of carbon molecules such as sugars.

• It does not release carbon dioxide into the atmosphere.

• None of the above.

True or False: Animal cells can do Cellular respiration and plant cells can do photosynthesis. Animal cells cannot do photosynthesis. Plant cells can do cellular respiration.

• True

• False

• Uhhhh idk

• Absolutely NO idea