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Unit 2 Review (photosynthesis & eco-cycles)

Total questions: 63

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

Which of the following are reactants of photosynthesis?

a)

CO2 and H2O

b)

O2

c)

H2O and Glucose

d)

None of the above

2.

Photosynthesis produces Glucose for plants. This is a form of __________________________ for plants.

a)

Chemical energy

b)

Thermal energy

c)

Light energy

d)

Radiant energy

3.

In which organelle does photosynthesis occur?

a)

Cell Wall

b)

Chlorophyll

c)

Chloroplast

d)

Cytoplasm

4.

What are the end products of photosynthesis?

a)

Carbon Dioxide and Water

b)

Glucose and Carbon Dioxide

c)

Oxygen and Glucose

d)

Water and Glucose

5.

What is the byproduct of photosynthesis? What does the plant release?

a)

Oxygen

b)

Carbon Dioxide

c)

Water

d)

Glucose

6.

What energy does the plant need from the Sun to make food (or carry out photosynthesis)?

a)

light energy

b)

heat energy

c)

electrical energy

7.

Why is leaf Z not able to make food?

a)

The leaf could not receive light.

b)

The leaf could not receive water.

c)

The leaf could not receive carbon dioxide.

8.

Both plants were watered daily. Which plant will be able to photosynthesize?

a)

Plant A only

b)

Plant B only

c)

Plant A and Plant B

9.

The process in which plant cells make energy

a)

Exothermic

b)

Endothermic

c)

Cellular Respiration

d)

Photosynthesis

10.

What are the reactants in Photosynthesis?

a)

Sun, CO2, glucose

b)

glucose and oxygen

c)

sun, carbon dioxide, water

d)

water, glucose

11.

In cellular respiration, carbon starts out in the glucose molecule, but ends up in a(n)

a)

oxygen molecule

b)

water molecule

c)

CO2 molecule

d)

C6H12O2 molecule

12.

In what process does ATP get created?

a)

photosynthesis

b)

cellular respiration

c)

radiation

d)

chemical

13.

How do humans get glucose so they can live?

a)

breathe it in

b)

photosynthesis

c)

eat food

d)

drink liquids

14.

Mitochondria and Chloroplasts are:

a)

organelles

b)

cells

c)

only in humans

d)

only in plants

15.

Cellular respiration happens

a)

only in plants

b)

only in animals

c)

only in humans and animals

d)

in plants and animals

16.

The products of cellular respiration are

a)

air and water

b)

carbon dioxide, water, and ATP

c)

glucose and carbon dioxide

d)

ATP, glucose, and oxygen

17.

For photosynthesis, a plant needs water, sun, and...

a)

oxygen

b)

carbon dioxide

c)

glucose

d)

mitochondria

18.

For humans to live, we need energy. What is the name of the energy that the body makes in cellular respiration?

a)

sugar

b)

glucose

c)

ATP

d)

fructose

19.

What is a product of photosynthesis AND a reactant for cellular respiration?

a)

oxygen

b)

water

c)

carbon dioxide

d)

Doctor Pepper

20.

Cellular respiration happens in the

a)

plants only

b)

animals only

c)

chloroplasts

d)

mitochondria

21.

Carbon dioxide is returned to the atmosphere primarily by the

a)

eruption of volcanoes.

b)

respiration of consumers.

c)

fallout from solar flares.

d)

process of photosynthesis.

22.

Organisms that use energy from the sun to make their own food are called

a)

carnivores.

b)

consumers.

c)

omnivores.

d)

producers.

23.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
24.
What is the ultimate ORIGINAL source of energy for living things
a)
Sugar
b)
Sun
c)
Moon
d)
Carbon Dioxide
25.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
26.
Which statement about photosynthesis is correct?
a)
Plants get the energy they need for photosynthesis from water.
b)
Plants get the energy they need for photosynthesis from soil.
c)
Plants get the energy they need for photosynthesis from sunlight.
d)
Plants get the energy they need for photosynthesis from carbon dioxide.
27.
What is the name of the simple sugar that is produced in photosynthesis?
a)
Sucrose
b)
Dextrose
c)
Glucose
d)
Lactose
28.

Which example is a form of precipitation?

a)

Dew

b)

Fog

c)

Frost

d)

Hail

29.

In which area would the rate of evaporation be the lowest?

a)

Over the ocean

b)

Over the mountains

c)

Over the rainforest

d)

Over the desert

30.

As a part of the water cycle, water from Earth's surface enters the clouds and finally falls back to the ground in the form of rain. What is the correct sequence of processes water undergoes?

a)

Evaporation, Condensation, Precipitation

b)

Precipitation, Condensation, Evaporation

c)

Condensation, Evaporation, Precipitation

d)

Evaporation, Precipitation, Condensation

31.

What would happen if the Sun is removed from the water cycle?

a)

The water cycle would not include precipitation but would continue with groundwater flow.

b)

The water cycle would no longer occur because the Sun provides the energy for evaporation and transpiration.

c)

The water cycle would no longer occur because the Sun provides energy for the formation of clouds.

d)

The water cycle would not include evaporation and transpiration but would continue with condensation.

32.

A student draws a model to represent the precesses involved in the water cycle, as shown. To which process is the formation of clouds related?

a)

Condensation

b)

Evaporation

c)

Freezing

d)

Melting

33.

The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?

a)

W

b)

X

c)

Y

d)

Z

34.

On Earth, what process generates most of the water vapor?

a)

Condensation

b)

Evaporation

c)

Precipitation

d)

Transpiration

35.

Rain and snow are two different forms of precipitation that fall on Earth's surface. Which factor is responsible for there being different forms of precipitation?

a)

Evaporation

b)

Run-off

c)

Temperature

d)

Transpiration

36.

What is precipitation?

a)

Sweat from our bodies on hot days

b)

Warm rain but not cold snow or sleet

c)

Gas that we use in furnaces or ovens

d)

Any form of water that falls from the sky

37.

What are formed when water vapor condenses?

a)

Clouds

b)

Mountains

c)

Transpiration

d)

Valleys

38.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
39.

Water in its gas form is called ____________________,

a)

water vapor

b)

precipitation

c)

ice

d)

air

40.
On which kind of day would you expect the most evaporation from the surface of a pond?
a)
cold, rainy
b)
cold, sunny
c)
warm, rainy
d)
warm, sunny
41.
Sublimation is
a)
when solid turns into gas
b)
when gas turns into plasma
c)
when liquid turns into gas
d)
when gas turns into solid
42.

True or False. The nitrogen in the atmosphere is in the right form for living things to use.

a)

True

b)

False

43.

This can transform nitrogen in the atmosphere into a usable form of nitrogen

a)

rain

b)

ice

c)

lightning

d)

sun

44.

Where can nitrogen fixing bacteria be found

a)

Free living in the soil

b)

under the leaves of flowering plants

c)

in the atmosphere

d)

living on the nodules of certain plants

45.
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
a)
nitrogen composition
b)
ammonia 
c)
nitrogen fixation
d)
denitrification
46.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
47.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
48.
Nitrification happens in the ______
a)
Air 
b)
Soil 
c)
Ground Water 
d)
Plants 
49.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
50.
What does not produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
51.
How do living organisms return carbon to the atmosphere in the carbon cycle?
a)
respiration and photosynthesis
b)
 decomposition and respiration
52.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
53.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
54.

Which is a true statement?

a)

Humans depend on oxygen, plants depend on carbon dioxide

b)

Plants produce carbon dioxide

c)

Humans depend on carbon dioxide, plants depend on oxygen

d)

Humans don't depend on plants for the air they need

55.
If the plant population decreased, the amount of carbon would _________.
a)
Stay the same
b)
Increase
c)
Decrease
56.
Respiration is the process by which animals take in _____ and release _____. 
a)
photosynthesis, air
b)
carbon, oxygen
c)
oxygen
d)
oxygen, carbon dioxide
57.
oxygen is a gas produced by _ and used by  _ 
a)
plants and animals 
b)
photosynthesis and carbon dioxide 
c)
animals and plants 
d)
carbon dioxide and photosynthesis
58.
if there is a fire in a forest, there will be less _ in the environment?
a)
nitrogen
b)
oxygen
59.
How is the burning of fossil fuels related to global warming?
a)
Magic
b)
Fuels are hot
c)
Greenhouse effect
d)
Photosynthesis
60.

Carbon atoms cannot be created or destroyed

a)

True

b)

False

c)

Not enough information to answer

61.
1. Oxygen exists in the atmosphere as which state of matter?
a)
solid
b)
liquid 
c)
gas
d)
plasma
62.
In the atmosphere, carbon attaches to oxygen to form _____.
a)
C
b)
O
c)
CO2 
d)
C6H12O6
63.
What is the an important element for living things.
a)
Neon
b)
Hydrogen
c)
Helium
d)
Carbon

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