Green slides

Open Ended

Why is photosynthesis considered essential for life on Earth?

Multiple Choice

What was the main finding of Jan van Helmont's experiment with growing a tree from a seed in a measured amount of soil?

• The mass of the tree increased due to water

• The tree grew because of sunlight

• The soil provided all the nutrients for growth

• The tree did not grow at all

Multiple Choice

Which scientist discovered that plants produce oxygen, which keeps a candle burning under a jar?

• Joseph Priestley

• Jan Ingenhousz

• Melvin Calvin

• Isaac Newton

Multiple Select

Which of the following statements about photosynthesis and gas exchange in plants are correct?

• Oxygen is given off by leaves during the day.

• Carbon dioxide is given off by leaves at night.

• Oxygen is given off by leaves at night.

• Carbon dioxide is given off by leaves during the day.

Open Ended

How did Melvin Calvin's use of carbon-14 help advance our understanding of photosynthesis?

Multiple Choice

What is the main source of energy required for photosynthesis?

• Sunlight

• Glucose

• Oxygen

• Carbon dioxide

Multiple Choice

Which part of the electromagnetic spectrum is used by plants for photosynthesis?

• Visible light

• Gamma rays

• Infrared

• Radio waves

Multiple Choice

What causes the different colors we see when white light passes through a prism?

• Different wavelengths of visible light are refracted at different angles.

• The prism adds color to the light.

• The light is absorbed by the prism and re-emitted as colors.

• The prism splits the light into particles of different colors.

Multiple Select

Which statements about how we perceive color in plants are correct?

• We see the color of photons that are reflected by the object.

• All colors of light are absorbed by plants.

• Some colors of light are absorbed while others are reflected.

• The color we see is determined by the light that is transmitted through the object.

Multiple Choice

Which pigments in plants absorb blue-violet and red light but reflect green light?

• Chlorophyll a and b

• Carotenoids

• Anthocyanins

• Xanthophylls

Open Ended

Explain why leaves change color in the fall, referring to the role of chlorophyll and other pigments.

Multiple Choice

Which organ in plants is primarily responsible for carrying out photosynthesis?

• Leaf

• Root

• Stem

• Flower

Multiple Choice

Which part of the leaf is responsible for controlling the opening and closing of the stomata?

• Guard cells

• Palisade layer

• Vein

• Cutin

Open Ended

Explain how the structure of the leaf supports its function in photosynthesis.

Multiple Choice

What is the main reason stomata close during the night?

• To prevent too much water loss

• To allow more oxygen in

• To increase sugar production

• To absorb more sunlight

Open Ended

Describe the role of stomata in the process of photosynthesis and gas exchange in plants.

Multiple Select

Which of the following are reactants in the process of photosynthesis?

• CO2

• H2O

• O2

• Carbohydrates

Multiple Select

Which of the following are components of the chloroplast?

• Thylakoid

• Stroma

• Mitochondria

• Granum

Multiple Choice

Which part of the chloroplast is responsible for the light-dependent reactions of photosynthesis?

• Thylakoid membrane

• Stroma

• Granum

• Outer membrane

Open Ended

Explain the relationship between the light-dependent reactions and the Calvin cycle in photosynthesis.

Open Ended

What is one question you still have about the process of photosynthesis or its history after this lesson?

Multiple Choice

How did Jan van Helmont contribute to the study of photosynthesis?

• He discovered oxygen.

• He showed that the mass of a tree increases mainly due to water.

• He invented the microscope.

• He proved that plants need sunlight.