BARU
Ukuran huruf
S
M
L
XL
Lembar kerjaCarbon dioxide/Oxygen Cycle
Total soal: 20
Worksheet time: 15mins
Nama
Kelas
Tanggal
1.
Oxygen is a living element that humans and animals require to live.
a)
True
b)
False
2.
What does an "exchange of gases" mean?
a)
It means that gases are apart of everything.
b)
It means that orange juice is an upside down milkshake with a missing tail.
c)
It means that humans and plants trade gases back and forth.
d)
It means that carbon in apart of all living things.
3.
Why is the CO2 and O2 cycle considered to be a cycle?
a)
there is a exchange of gases
b)
the trees use it and trees are apart of all cycles
c)
there is a continuous exchange of gases
4.
Which type of organism gets its energy directly from the Sun?
a)
producer
b)
consumer
c)
composer
d)
decomposer
5.
Which statement is true about the carbon dioxide-oxygen cycle?
a)
animals breathe in nitrogen and release oxygen which is used by plants
b)
animals breathe in oxygen and release carbon dioxide which is used by plants
c)
animals breathe in nitrogen and release carbon dioxide which is used by plants
d)
animals breathe in carbon dioxide and release oxygen which is used by plants
6.
If all the trees on Earth were destroyed, what would be the effect on humans?
a)
there would be a lack of food
b)
there would be a lack of oxygen
c)
there would be a lack of fresh water
d)
there would be a lack of carbon dioxide
7.
The class decided to have a terrarium. The teacher says it is important to include both plants and animals. Why is it necessary to include both plants and animals?
a)
plants provide food for the animals and animals provide water for the plants
b)
plants provide water for the animals and animals provide food for the plants
c)
plants provide carbon dioxide for the animals and animals provide oxygen for the plants
d)
plants provide oxygen for animals and the animals provide carbon dioxide for the plants
8.
Animals and plants use substances that cycle through the environment. Which substance is needed by plants to survive and is released into the environment by animals?
a)
oxygen
b)
sugar
c)
salt
d)
carbon dioxide
9.
If the removal of many plants and trees increase in a forest, what effect could this have on the carbon dioxide and oxygen cycle?
a)
CO2 levels decrease
b)
CO2 levels increase
c)
Nitrogen levels decrease
d)
Oxygen levels increase
10.
The CO2/O cycle is important to animals because it provides
a)
a gas they take in when breathing
b)
chemicals that build bones
c)
energy they need to move
d)
fresh water for their survival
11.
________________ could increase the amount of oxygen in the air.
a)
Building more houses
b)
Burning more oil
c)
Paving more streets
d)
Planting more trees
12.
Plants use _____________ to make their own food during photosynthesis.
a)
water
b)
energy from the Sun
c)
CO2
d)
water, energy from Sun, CO2
13.
What causes an increase in the oxygen level in the atmosphere?
a)
Oxygen inhaled by animals.
b)
Oxygen released by animals.
c)
Oxygen released by plants.
d)
Oxygen taken in by animals.
14.
How plants and animals interact in the CO2/O cycle?
a)
Plants release O into the atmosphere which animals inhale. Animals exhale CO2 into the atmosphere which is breath in by plants.
b)
Animals release O into the atmosphere which plants inhale. Plants exhale CO2 into the atmosphere which is breath in by animals.
c)
Plants and animals don't need each other.
d)
Plants and animals take in O and release CO2.
15.
If the Sun stop shinning, plants and animals would not survive because ___________________.
a)
Plants use the Sun's energy and oxygen to make glucose, which animals eat.
b)
Plants use the Sun's energy and CO2 to make glucose, and release O that animals breathe.
c)
Plants use the Sun's energy to make CO2 and release glucose.
d)
Plant use the Sun's energy to make water and release O that animals breathe in.
16.
In the CO2/O cycle arrows in a diagram represents __________.
a)
The cycling of water through the environment.
b)
The cycling of nitrogen through the environment.
c)
The cycling of CO2 and O through the environment.
d)
The cycling of energy through nonliving parts of the environment.
17.
Which answer best defines photosynthesis?
a)
the movement of carbon dioxide and oxygen between organisms and the air
b)
Tiny holes in the leaves of a plant that allow gases to enter or leave the plant
c)
the process in which plants use energy from the sun to make their own food
d)
a gas in the atmosphere that plants use to make food
18.
Which answer best defines organisms?
a)
a gas in the atmosphere that plants use during the process of photosynthesis
b)
living things
c)
tiny holes in the leaves of a plant that allow gases to enter or leave a plant
d)
plant parts that hold a plant in place and take in water and nutrients
19.
Animals use oxygen for _____________.
a)
breathing
b)
creating food
c)
making glucose
d)
transpiration
20.
Which statement is an example of how plants and animals depend on each other?
a)
animals provide food for plants
b)
animals provide water for plants
c)
animals provide oxygen for plants
d)
animals provide carbon dioxide for plants
Setel ulang
