bio ch.8 lab

studied byStudied by 4 people
5.0(1)
get a hint
hint

Plants use carbon dioxide and the energy from the sun during ____________ to produce glucose.

1 / 36

encourage image

There's no tags or description

Looks like no one added any tags here yet for you.

37 Terms

1

Plants use carbon dioxide and the energy from the sun during ____________ to produce glucose.

photosynthesis

New cards
2

Photosynthesis is a combination of

multiple chemical reactions

New cards
3

A reactant of photosynthesis whose general levels can be measured is

carbon dioxide

New cards
4

_________ is a measure of the amount of hydrogen ions in a solution.

pH

New cards
5

The greater the amount of hydrogen ions, the ___________ the solution.

more acidic

New cards
6

As hydrogen ions are removed from a solution it becomes

more basic

New cards
7

Carbon dioxide combines with water to form

carbonic acid

New cards
8

Therefore, the more carbon dioxide in a solution, the __________ it will be.

more acidic

New cards
9

is a pH indicator that turns yellow in an acidic environment & pinkish-red in basic solutions

phenol red

New cards
10

What is happening to the level of carbon dioxide in the experimental test tube with the Elodea leaf as indicated by the red color in the tube?

The level of carbon dioxide is decreasing.

New cards
11

What is happening to the level of carbon dioxide in the negative control test tube without the Elodea leaf as indicated by the yellow color in the tube?

The level of carbon dioxide is unchanged.

New cards
12

Why are carbon dioxide levels changing in the tube with Elodea?

Carbon dioxide levels are dropping because carbon dioxide is a reactant in photosynthesis.

New cards
13

A product of photosynthesis that can be measured is

oxygen

New cards
14

________ is crucial to providing the energy needed for photosynthesis.

light

New cards
15

One method to observe the progress of photosynthesis is to monitor the

production of one of its products, oxygen.

New cards
16

_________________ solution provides carbon dioxide and water

Sodium bicarbonate (NaHCO)

New cards
17

A __________ allows the measurement of volume change due to displacement of a liquid. The liquid may be displaced by addition or removal of a substance, such as oxygen.

volumeter

New cards
18

Carbon dioxide molecules react with water molecules using light energy to produce

oxygen, water, and a glucose molecule

New cards
19

Why do you need to add carbon dioxide with the 3% sodium bicarbonate (NaHCO,) solution?

Carbon dioxide can be used by plants to make glucose during photosynthesis.

New cards
20

Why cover one test tube in aluminum foil?

The foil blocks light.

New cards
21

What are the reactants for photosynthesis?

carbon dioxide & water

New cards
22

Plants exposed to _________ will show a greater rate of photosynthesis compared to those exposed to green light.

blue light

New cards
23

Why does blue light lead to a greater rate of photosynthesis compared to green light?

Plants absorb certain wavelengths of light better than others for use in photosynthesis. Green light is reflected back and its energy is not fully available for use in photosynthesis.

New cards
24

Why is a 3% sodium bicarbonate (NaHCO,) solution added to each test tube?

- it is a source of water

- It is a source of carbon dioxide

New cards
25

Why is the volume level for the Elodea exposed to white light increasing?

The plant is undergoing photosynthesis and producing oxygen.

New cards
26

Why is the volume level for the Elodea covered with foil decreasing?

The plant is undergoing cellular respiration and is consuming oxygen.

New cards
27

What do the "White light" (solid red) and "Darkness" (striped orange) bars represent?

The solid red bar shows how oxygen volume increases due to photosynthesis, and the striped orange bar shows how oxygen volume decreases due to aerobic cellular respiration and a lack of photosynthesis.

New cards
28

Based on your results, what can you conclude from the "determining white light" experiment?

Plants exposed to white light will undergo photosynthesis and produce oxygen.

New cards
29

The pigments that are more soluble will migrate ______ than those that are less soluble.

farther

New cards
30

Chlorophyll a is

blue-green

New cards
31

Chlorophyll b is

yellow-green

New cards
32

Carotenes are

orange

New cards
33

Xanthophylls are

yellow

New cards
34

What is the purpose of the chromatography solvent?

The pigments dissolve in the chromatography solvent, which allows them to be separated.

New cards
35

What is the purpose of using extract from chloroplasts?

Chloroplasts contain the photosynthetic pigments.

New cards
36

Why does chlorophyll b appear yellow-green?

It reflects light in those wavelengths and absorbs violet and red.

New cards
37

Why did the different photosynthetic pigments migrate to different points on the chromatography paper?

The pigments differ in their solubility in the solvent and affinity for the paper

New cards

Explore top notes

note Note
studied byStudied by 144 people
Updated ... ago
5.0 Stars(2)
note Note
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 93 people
Updated ... ago
5.0 Stars(2)
note Note
studied byStudied by 12 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 8 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 12 people
Updated ... ago
5.0 Stars(1)

Explore top flashcards

flashcards Flashcard57 terms
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard22 terms
studied byStudied by 14 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard22 terms
studied byStudied by 43 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard51 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard54 terms
studied byStudied by 34 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard47 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard147 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard312 terms
studied byStudied by 9671 people
Updated ... ago
3.8 Stars(164)