4.4.1 Photosynthesis MEGA test revision quiz

What are the reactants of photosynthesis?

• glucose and oxygen

• carbon dioxide and water

• light and chlorophyll

• cabon dioxide and glucose

What are the products of photosynthesis?

• glucose and oxygen

• carbon dioxide and water

• light and chlorophyll

• cabon dioxide and glucose

What gas is produced during the rate of photosynthesis pondweed practical?

• Carbon dioxide

• Oxygen

• Hydrogen

• Carbon monoxide

What apparatus could be used to measure the volume of gas more accurately in the photosynthesis practical?

• Beaker

• Measuring cylinder

• Gas syringe

• Conical flask

Why is counting the bubbles inaccurate? Click two answers.

• You may miss a bubble.

• The bubbles are all the same size.

• The bubbles could be different sizes (volumes)

• The stream of bubbles is too fast to count.

How could you reduce the light intensity in the photosynthesis experiment?

• Move the lamp closer

• Move the lamp further away

• Increase the temperature

• Put a coloured filter in front of the lamp

What is the independent variable for the photosynthesis practical? (the one thing we change)

• Light intensity

• Rate of photosynthesis

• Temperature

• Type of pondweed

What is the dependent variable for the photosynthesis practical?

• Light intensity

• Rate of photosynthesis

• Temperature

• Type of pondweed

Which of these are control variables? Tick three boxes.

• Light intensity

• Rate of photosynthesis

• Temperature

• Type of pondweed

• Availability of carbon dioxide

On a hot sunny day, what factor limits photosynthesis?

• Carbon dioxide availability

• Temperature

• Light

• Chlorophyll