Science 4C

Question 0

True or False: Only producers perform photosynthesis

Answer 0

True (primarily plants and algae)

Question 1

What is the process that most producer organisms use to make their food?

Answer 1

Photosynthesis

Question 2

Photosynthesis takes these three things and converts these into oxygen and the chemical energy of sugar.

Answer 2

light energy from the sun
carbon dioxide
water

Question 3

Photosynthesis takes light energy from the sun, carbon dioxide, and water and converts these into

1. ?
2. ?

Answer 3

oxygen and

chemical energy of sugar

Question 4

This general equation shows the reactants and products of photosynthesis:

______ + _____ + _____ → ______ + ______
(reactants) (products)

Answer 4

carbon dioxide + water + light energy → sugar + oxygen

Question 5

What organisms perform photosynthesis?

Answer 5

Plants and algae (producers)

Question 6

In photosynthesis, _______ energy (light) is changed to _______ energy (sugar).

Answer 6

kinetic energy (light) 
potential energy (sugar)

Question 7

Photosynthesis does NOT occur every time water, carbon dioxide, and light energy combine.

For photosynthesis to occur, what else must be present?

Answer 7

Organelles
Enzymes
Special pigments (chlorophyl)

Question 8

Even though the same materials are present, the photosynthesis “assembly line” for sugar molecules is different from the cellular respiration “disassembly line.” What are these differences?

Answer 8

Cellular respiration and photosynthesis use different enzymes.

The energy used by photosynthesis is LIGHT, energy produced by cellular respiration is ATP.

Question 9

photosynthesis:

photo = ?
synthesis = ?

Answer 9

photo = light
synthesis = to put together

Question 10

Energy is the ability to do work. Energy can be divided into two types—

Answer 10

kinetic and potential

Question 11

What type of energy is the energy of motion? It is energy that is being used.

What type of energy is stored energy? It has the potential to do work, but it isn’t doing any work while it is being stored

Answer 11

Kinetic energy

Potential energy

Question 12

Sunlight is this type of energy? Producers capture that energy and store it in a sugar molecule.

The sugar molecule is a form of ______ energy. It will store and keep this energy for later.

Answer 12

Kinetic

potential

Question 13

_______ are colored substances that absorb light energy. They are necessary to perform photosynthesis.

Answer 13

Pigments

BTW: Various pigments make some algae and plant leaves appear red, pink, yellow, brown, etc

Question 14

What is the primary pigment of photosynthesis.

HINT: it is green

Answer 14

Chlorophyll

BTW: As chlorophyll absorbs light, the energy is changed to a new form. It becomes chemical energy. This chemical energy, (oxygen) is used in the rest of photosynthesis.

Question 15

Where is Chlorophyll located in a cell?

HINT: it’s an organelle

Answer 15

Chloroplasts

Question 16

What’s the difference between chlorophyll and chloroplasts?

Answer 16

Chlorophyl is a green pigment (dye)

Chloroplasts are an organelle with green pigment inside

Question 17

How many membranes do Chloroplasts? Describe them:

Answer 17

Outer layer is normal membrane

Inner layer has stacks of flattened sacs that look like coins. They overlap and interconnect with itself in many places

Question 18

Which membrane of the Chloroplast is Chlorophyll located?

Answer 18

inner membrane (stacks of coins) (show page 84)

Question 19

What are the two phases of photosynthesis?

Answer 19

light-dependent phase and the light-independent phase

Question 20

Process of photosynthesis:

Answer 20

Step 1: capture sunlight in chloroplasts

Step 2: change carbon dioxide and water into sugar (this occurs in spaces between Chloroplasts two membranes). The energy captured by chlorophyll is stored in the chemical bonds of sugar molecules (potential energy)

Question 21

TWO reasons why photosynthesis is important to humans

HINT: we are consumers

Answer 21

1. Some Consumers get energy from eating plants (they take the plants sugar energy)
2. Many organisms use aerobic cellular respiration (Oxygen) to transform sugar energy into the usable form of ATP. (We breathe)

Question 22

Describe the process of photosynthesis in simple terms:

Answer 22

photosynthesis uses carbon dioxide, water, and sunlight to produce stored chemical energy (sugar) and oxygen

Question 23

4C Section Review

List the three substances that photosynthesis uses to form sugar and oxygen.

carbon dioxide + water + light energy → sugar + oxygen

Answer 23

carbon dioxide + water + light energy →

Question 24

Oxygen is released during which phase of photosynthesis?

a. light-independent
b. electron transport chain
c. light-dependent phase
d. fermentation process.

Answer 24

Light-dependent phase

Question 25

What process does this equation represent?

carbon dioxide + water + light energy → sugar + oxygen

Answer 25

Photosynthesis

Question 26

2. (True or False) Photosynthesis is performed only by organisms that do not use cellular respiration.

Answer 26

False.

ALL organisms have cellular respiration

Question 27

Substances that absorb light energy are called __________.

Answer 27

Pigments

Question 28

Photosynthesis takes kinetic energy from the sun and stores it as potential energy in the form of sugar.

Answer 28

True

Question 29

What substance absorbs light energy during photosynthesis?
a. carbon dioxide

c. chlorophyll
b. oxygen
d. lactic acid

Answer 29

Chlorophyl

Question 30

True or False:

Chlorophyl is a pigment. What color?

Answer 30

True. Green

Question 31

What is the primary purpose of photosynthesis?
a. produce ATP for the cell

b. produce carbon dioxide for cellular respiration
c. to produce sugar for the organism
d. to produce water for the water cycle

Answer 31

Produce ATP

Question 32

In which phase of photosynthesis is sugar produced?

Answer 32

Light-independent phase