Unit 8 Lesson 2: Photosynthesis and Cellular Respiration

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?

• it is produced during photosynthesis

• it is a product of cellular respiration

• it is needed to create energy for cells

• it is created when plants are consumed

What happens to glucose inside a cell during cellular respiration?

• The cell uses carbonic acid to break down glucose.

• The cell uses water to break down glucose.

• The cell uses oxygen to break down glucose.

• The cell uses nitrogen to break down glucose.

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?

• energy and carbon

• glucose and oxygen

• carbon dioxide and water

• chlorophyll and chloroplasts

Why are animals important to the process of photosynthesis?

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

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

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

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

What is the missing product of photosynthesis not shown in the diagram?

• Glucose

• Nitrogen

• Sulfur

• Calcium

Why does burning fossil fuels release carbon dioxide?

• Fossil fuels contain carbon that combines with oxygen when burned.

• Fossil fuels are made of pure oxygen.

• Burning fossil fuels releases nitrogen.

• Fossil fuels are composed of water.