09 - Photosynthesis

Examine the image. What was the experimental question being asked?

• Do plants produce carbon dioxide?

• Do animals produce oxygen?
• Do plants produce a substance that animals need to live?
• Do plants and animals need oxygen?

Van Helmont's experiment showed that plants:

• did not get their mass from the air
• did not get their mass from the soil
• did not grow without sunlight
• got their mass from the soil

The raw materials needed for plants to carry out photosynthesis are:

• carbon dioxide and oxygen
• oxygen and water
• carbon dioxide and water
• water and sunligh

Organisms that convert sunlight into usable energy sources are called:

• autotrophs

• heterotrophs

• consumers

• detrivores

An aquatic plant is placed under a light and a student counts the number of bubbles being released from its stem. What are the bubbles?

• oxygen
• carbon dioxide
• chlorophyll
• glucose

What factors can increase the rate of photosynthesis in plants?

• light intensity
• distance of light
• color of light
• all of these

What product is made from photosynthesis that is used by the plant for growth?

• glucose
• oxygen
• water
• carbon dioxide

Which of the following is likely to have the LEAST effect on the rate of photosynthesis?

• intensity of light
• amount of oxygen
• amount of carbon dioxide
• amount of water

Where does the light dependent reaction take place?

• thylakoids
• stroma
• mitochondria
• cytoplasm

What part of the plant would be considered the photosynthetic organ?

• root
• flower
• stem
• leaf