Question

color by number
photosynthesis
name:
date:
per:
directions: answer each question by circling the correct choice. after you have completed all of the
questions, color the picture using the assigned colors. you may choose any color you like for any part
of the picture that is not numbered.

1. the process by which cells capture

energy from the sun and convert it
into food is called...
cellular respiration
yellow
photosynthesis
green
diffusion
light green

1. plants use water, carbon dioxide,

and sunlight to produce oxygen,
water, and...
nitrogen
yellow
chlorophyll
dark green
glucose
light green

1. in which cell organelle does

photosynthesis occur?
chloroplast
dark green
nucleus
light green
mitochondria
green

1. the green color of a plant comes

from a pigment called...
chlorophyll
orange
carotene
red
anthocyanin
brown

1. what is the source of energy for

photosynthesis?
soil
purple
sunlight
green
glucose
yellow

1. the tiny openings on the underside

of a leaf that help plants take in co₂
are called...
thylakoid
membranes
pink
chloroplasts
dark green
stomata
light green

1. what structure contains the

chlorophyll that is used to absorb
light?
chloroplast
orange
thylakoid
red
stroma
sky blue

1. which of the following is not

required for photosynthesis to take
place?
sunlight
yellow
water
pink
oxygen
purple

1. what happens to the sugar that

plants make during photosynthesis?
it is stored as
starch for
later use
light purple
it evaporates
through the
stomata
pink
it returns to
the soil
yellow

1. the source of oxygen produced

during photosynthesis is...
glucose
sky blue
water
light green
sunlight
pink

1. which of the following statements

is false?
photosynthesis
takes place in
autotrophs.
orange
oxygen is a
product of
photosynthesis.
pink
photosynthesis
takes place in the
nucleus of
plant cells.
green

1. which of the following statements

is true?
photosynthesis
takes place
primarily in plant
leaves.
sky blue
plants obtain
their \food\
from the soil.
yellow
photosynthesis
only occurs
in plants.
brown

Explanation:

1. Photosynthesis is the process where cells capture solar energy and convert it into food. Cellular respiration is the opposite (breaking down food for energy), and diffusion is the movement of molecules.
2. In photosynthesis, plants use water, carbon dioxide, and sunlight to produce oxygen, water, and glucose (a sugar). Nitrogen is not a product here, and chlorophyll is a pigment involved in the process, not a product.
3. Chloroplasts are the organelles where photosynthesis occurs. The nucleus contains genetic material, and mitochondria are for cellular respiration.
4. Chlorophyll gives plants their green color. Carotene is orange (like in carrots), and anthocyanin is brown/red (e.g., in some autumn leaves).
5. Sunlight is the energy source for photosynthesis. Soil provides nutrients but not the energy, and glucose is a product of photosynthesis.
6. Stomata are the tiny openings on the underside of leaves for gas exchange (including taking in \(CO_2\)). Thylakoid membranes are inside chloroplasts (involved in the light - dependent reactions), and chloroplasts are the organelles.
7. Thylakoid membranes contain chlorophyll for light absorption. Chloroplasts are the organelles, and stroma is the fluid inside chloroplasts (site of the Calvin cycle).
8. Oxygen is a product of photosynthesis, not a requirement. Sunlight and water are needed (sunlight for energy, water for the light - dependent reactions).
9. The sugar (glucose) made during photosynthesis is stored as starch for later use. Evaporation through stomata is transpiration (related to water loss), and it doesn't return to the soil.
10. Water is the source of oxygen in photosynthesis (during the light - dependent reactions, water is split). Glucose is a product, and sunlight is the energy source.
11. Photosynthesis occurs in the chloroplasts (not the nucleus) of plant cells. Autotrophs (like plants) perform photosynthesis, and oxygen is a product.
12. Photosynthesis primarily occurs in plant leaves (where there are a lot of chloroplasts). Plants make their food (glucose) through photosynthesis (not get it from the soil, though they get nutrients from the soil), and photosynthesis also occurs in some algae (not only in plants).

Answer:

1. B. photosynthesis
2. C. glucose
3. A. chloroplast
4. A. chlorophyll
5. B. sunlight
6. C. stomata
7. B. thylakoid
8. C. oxygen
9. A. it is stored as starch for later use
10. B. water
11. C. Photosynthesis takes place in the nucleus of plant cells
12. A. Photosynthesis takes place primarily in plant leaves