Understanding Photosynthesis Basics

Which of the following is a factor that affects the rate of photosynthesis?

• Wind speed

• Light intensity

• Soil type

• Altitude

What role does chlorophyll play in photosynthesis?

• It absorbs sunlight.

• It stores glucose.

• It releases oxygen.

• It transports water.

How does temperature affect the rate of photosynthesis?

• Higher temperatures always increase the rate.

• Lower temperatures always increase the rate.

• Extremely high or low temperatures can decrease the rate.

• Temperature has no effect on the rate.

What is the primary source of energy for photosynthesis?

• Water

• Sunlight

• Oxygen

• Glucose

Which gas is taken in by plants during photosynthesis?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

What is the main product of photosynthesis that is used by plants for energy?

• Oxygen

• Carbon dioxide

• Glucose

• Water

How does light intensity affect the rate of photosynthesis?

• The rate decreases as light intensity increases.

• The rate increases as light intensity increases, up to a point.

• Light intensity has no effect on the rate.

• The rate is highest in complete darkness.

Which of the following is a by-product of photosynthesis that is essential for animal life?

• Nitrogen

• Oxygen

• Carbon dioxide

• Methane

Why is photosynthesis important to ecosystems?

• It provides oxygen for animals to respire.

• It increases soil erosion.

• It decreases biodiversity.

• It reduces the amount of sunlight reaching the Earth.

Which of the following is NOT a factor affecting photosynthesis?

• Carbon dioxide concentration

• Temperature

• Soil pH

• Leaf size