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Science 5 Circulatory System and Ecosystem

Total questions: 122

Worksheet time: 2hrs 22mins

Name
Class
Date
1.

What is the main organ of the circulatory system?

a)

Small intestine

b)

Bone

c)

Blood vessels

d)

Heart

2.

The job of the heart is to . . .

a)

pump blood around the body.

b)

send food to the small intestines.

c)

break down food.

d)

give energy to the body.

3.

The heart is about the size and shape of your . . .

a)

head

b)

fist

c)

hand

d)

foot

4.

How does the heart work?

a)

It pumps blood first to the lungs, back to the heart and then around the rest of the body.

b)

It pumps blood first to the rest of the body, back to the lungs and then to the heart.

c)

It pumps blood around the rest of the body, back to the heart and then to the lungs,

d)

It pumps blood first to the rest of the body, back to the heart and then around the rest of he body.

5.

What part is pointed with arrow?

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

6.

What part is pointed with arrow?

a)

Pulmonary veins

b)

Pulmonary artery

c)

Aorta

d)

Vena cava

7.

What part is pointed with arrow?

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

8.

What part is pointed with arrow?

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

9.
Which is the correct definition of the Circulatory system?
a)
The system fights disease so the body stays healthy.
b)
The system that circulates blood and oxygen through the body, consisting of the heart,blood vessels,and blood.
c)
Breaks down food into smaller pieces and absorbs those nutrients into the body.
d)
Provides shape and structure for the body.
10.

What part is pointed with arrow?

a)

Left atrium

b)

Right atrium

c)

Left ventricle

d)

Right ventricle

11.
What is the main function of the artery?
a)
It controls your brain and your thought process.
b)
They carry oxygen- poor blood BACK to the heart.
c)
Arteries carry oxygen- rich blood AWAY from the heart.
d)
It receives information (senses) and sends messages to the body about how to react to things.
12.
What do Red-Blood cells do?
a)
Carry oxygen from the lungs to the body cells and  transport carbon dioxide from the cells back to the lungs
b)
keeps blood flowing in one direction to the heart and prevent blood from flowing backwards
c)
Collects  blood from the capillaries and drain it into the veins
d)
Bring nutriients to the cells and carries away waste materials.
13.

What is plasma?

a)

The liquid part of the blood that carries all of the other blood cells around the body

b)

The thing which makes blood red

c)

The substance that comes out of a storm troopers blaster

d)

The cells which take oxygen from the lungs

14.
Which of the following help us to stop bleeding when we get a cut?
a)
Platelets
b)
Red Blood Cells
c)
White Blood Cells
d)
Plasma
15.

A woman is running in a race. Which of the following statements are true about the woman as she runs?

A. Her blood circulates at a higher rate.

B. Her body produces less carbon dioxide.

C. Her heart beats faster.

D. Her body needs more oxygen.

a)

A and D only

b)

B and C only

c)

A, C and D only

d)

B, C and D only

16.

Which of the following about X are likely to be true?

A. It connects Y and Z.

B. It transports waste materials to all parts of the body.

C. It is a smaller blood vessel than Y and Z.

a)

A and B only

b)

A and C only

c)

B and C only

d)

A, B and C only

17.

Ana measured her heart rate when she was resting.

It was 80 beats per minute. Immediately after carrying out an activity,

she measured her heart rate again. It was 125 beats per minute.

Which of the following activities did Ana carry out?

a)

Switching on the stove

b)

Folding a paper boat

c)

Playing badminton with her brother

d)

Sketching a picture

18.

Conrad swam a few laps. Which of the following organ systems worked together so that she had the energy

to carry out the activity?

A. Respiratory system

B. Muscular system

C. Digestive system

D. Circulatory system

a)

A and B only

b)

C and D only

c)

A, B and C only

d)

A, C and D only

19.

Devlin cycled a distance of 10 km. Which of the following graphs correctly shows his heart rate over time

as he cycled?

a)

b)

c)

d)

20.
Question Image

Based on the information in the table, match P, Q, R and S with their corresponding activities

below.

a)

Activity P

1.

Sleeping

b)

Activity Q

2.

Brisk walking

c)

Activity R

3.

Jogging

d)

Activity S

4.

Sprinting in a 100 m race

21.

What does it mean to transport?

a)

Move something from one place to another

b)

Stay in the same place

22.

What do veins do?

a)

Carry blood towards the heart

b)

Store food

c)

Nothing

23.
Which describes a task performed by the circulatory system?
a)
creating red blood cells
b)
sending messages to the brain
c)
transporting waste materials
d)
producing energy from food
24.
Which is responsible for providing oxygen to cells?
a)
respiratory system
b)
circulatory system
c)
muscular system
d)
nervous system
25.
Which best describes the relationship between the muscular system and the circulatory system? 
a)
The circulatory system captures carbon dioxide from the air for muscle energy.
b)
The circulatory system produces red blood cells to bring oxygen to the muscles
c)
The circulatory system provides a framework for muscle movement
d)
The circulatory system delivers oxygen for muscle energy
26.
Your blood is made up of which of the following...
a)
plasma, red blood cells, blue blood cells
b)
white and red blood cells
c)
plasma and platelets
d)
plasma, red blood cells, white blood cells, and platelets
27.
These cells, in the blood, carry oxygen and give the blood its color.
a)
white blood cells
b)
plasma
c)
platelets
d)
red blood cells
28.
This type of vessel carries blood TO the heart:
a)
vein
b)
nerve
c)
muscle
d)
artery
29.
When oxygen-rich blood is carried AWAY from the heart, it travels through an...
a)
artery
b)
neuron
c)
vein
d)
straw
30.
The cells in the blood that help fight germs and illnesses are the...
a)
red blood cells
b)
platelets
c)
white blood cells
d)
axons
31.
The circulatory system works with the ___________ system to provide our body with oxygen.
a)
respiratory
b)
digestive
c)
muscular
d)
skeletal
32.

What does overeating unhealthy fats lead to?

a)

these keep blood vessels clean and smooth

b)

they will cause fat build up in blood vessels

c)

it will cause you to lose sleep

d)

overeating these fats has no effect

33.

How does exercise help your circulatory system?

a)

makes bones strong

b)

lifting weights makes skeletal muscles strong

c)

it wont help because it will keep you up at night

d)

heart muscle will be strong and better pump blood

34.

Deoxygenated blood means that the blood is low in...

a)

Oxygen

b)

Carbon dioxide

35.

As the blood reaches the lungs, what is removed from the blood?

a)

Oxygen

b)

Carbon dioxide

c)

Red blood cells

d)

White blood cells

36.

The part of the blood that carries oxygen is called

a)

Red blood cells

b)

White blood cells

37.

The heart is about the size and shape of your ___.

a)

Hand

b)

Arm

c)

Fist

d)

Foot

38.

(a)   are the smallest blood vessels.

39.
On and off switches to let blood in and out of the heart are known as
a)
ventricles
b)
valves
c)
buttons
d)
pulses
40.
Capillaries join together
a)
veins and arteries
b)
veins and the heart
c)
arteries and veins
d)
heart and valves
41.
Abiotic means non-living, which abiotic factor was affecting the ecosystem in the video?
a)
Rain
b)
Temperature
c)
Sun
d)
Minerals
42.
How do bacteria, or decomposers, help the ecosystem?
a)
Give of Carbon Dioxide
b)
Breaks down dead animals 
c)
Give off Oxygen
d)
It doesn't help them, it kills them
43.
How do animals help keep plants alive in an ecosystem?
a)
Eats them
b)
Gives off Oxygen
c)
Nothing
d)
Gives off Carbon Dioxide
44.
Plants are producers, what do they produce that animals need to survive?
a)
Food 
b)
Oxygen
c)
Both Food and Oxygen
d)
Neither
45.
When one type of organism eats another; ________ is passed from one level to another.
a)
Food
b)
Water
c)
Energy
46.
A __________ is an ordered arrangement of animals and plants in which each feeds on the one below it.
a)
Food Web
b)
Food Chain
c)
Ecosystem
d)
Consumer
47.
A ________________ is the complex network of food chains.
a)
Food Network
b)
Ecosystem
c)
Producer
d)
Food Web
48.
What are the different levels of a food web?
a)
Producers, Herbivore, Carnivore, Decomposer
b)
Producers, Omnivore, Carnivore, Decomposer
c)
Herbivore, Omnivore, Carnivore
d)
Decomposer, Producer, Herbivore, Carnivore, Omnivore
49.
All energy on Earth ultimately comes from what source?
a)
Water
b)
Sun
c)
Consumers
d)
Oxygen
50.
An organism that needs to eat other organisms to obtain energy is known as a:
a)
Autotroph
b)
Producer
c)
Consumer
d)
Mutualist
51.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
52.
An organism that uses sunlight to create its own food is known as a:
a)
Producer
b)
Heterotroph
c)
Consumer
d)
Decomposer
53.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
54.
This organism recycles nutrients back into the soil when it breaks down dead stuff
a)
producers
b)
consumers
c)
decomposers
55.
Earthworms help break down plant and animal remains and return the nutrients back into the soil. What are earthworms?
a)
consumers
b)
decomposers
c)
producers
d)
predators
56.
An organism that lives by breaking apart dead organic matter into simpler parts is...
a)
scavenger
b)
consumer
c)
decomposer
d)
carnivore
57.
The place where an organism lives is its _________.
a)
habitat
b)
abiotic
c)
ecosystem
d)
community
58.
An individual living thing is a/an __________.
a)
habitat
b)
ecosystem
c)
organism
d)
population
59.
A group of organisms of the same species living in the same area are called a/an ________.
a)
community
b)
habitat
c)
population
d)
ecosystem
60.
All of the living and nonliving things in an area that interact with each other are called a/an ______.
a)
community
b)
habitat
c)
population
d)
ecosystem
61.
If the population of prey increases, the population of predators will ________because of the availability of food.
a)
decrease
b)
stay the same
c)
increase
62.
How do bacteria, or decomposers, help the ecosystem?
a)
Give of Carbon Dioxide
b)
Breaks down dead animals 
c)
Give off Oxygen
d)
It doesn't help them, it kills them
63.
What is a producers job in the ecosystem?
a)
to make food and oxygen for the animals
b)
to help plants grow
c)
to break down dead plants and animals
d)
to eat plants and other animals
64.
Elephants only eat plants.  What kind of consumer is an elephant?
a)
producer
b)
omnivore
c)
herbivore
d)
carnivore
65.
Which of the following is a natural disaster that could wipe out an ecosystem?
a)
a sunny day
b)
forest fire
c)
rain
d)
thunder storm
66.
Which of the following is a way that humans could change/destroy an ecosystem?
a)
Mowing the grass
b)
Building a shopping center
c)
enjoying a picnic
d)
watching tv
67.
When living things battle each other for resources, it is called
a)
producing
b)
recycling
c)
cooperation
d)
competition
68.
Which one is NOT an example of a decomposer?
a)
mushroom
b)
leaves
c)
mold
d)
worm
69.
An animal that hunts other animals for food is a ___________
a)
herbivore
b)
predator
c)
prey
d)
omnivore
70.
What is a carnivore?
a)
an animal that gets energy by eating other animals
b)
An animal that gets energy by eating only plants
c)
an animal that gets energy by eating both plants and animals
71.
A population of mice lives in a barn community. A cat population has just joined the community. What will happen?
a)
Mouse and cat populations both go up?
b)
Mouse and cat populations both go down
c)
Mouse population goes down as cat population goes up
d)
Mouse population goes up as cat population goes down
72.
Which best describes what a food chain shows you?
a)
Energy flowing through an ecosystem
b)
Food flowing through an ecosystem
c)
Consumers eating other organisms
73.
Choose the complete and logical food chain.
a)

sun -> plant -> rabbit -> eagle

b)

deer -> squirrel -> plant -> sun

c)

sun -> deer -> plant -> eagle

d)

eagle -> squirrel -> rabbit -> plant -> eagle

74.
Choose the list that BEST describes what plants and animals need to survive.
a)
soil, water, sunlight, food, air
b)
air, water, sunlight, and a source of food for energy
c)
food, air, oxygen, space, and water
d)
environment, habitat, space and sunlight
75.
Which of these relationships is harmful?
a)
crocodile and plover bird
b)
Two scavenger birds fighting to eat a dead animal
c)
A flea on a dog
d)
A ladybug eating aphids on a plant
76.
Which is a biotic factor?
a)
Fox
b)
Mountain
c)
Air
d)
Sunlight
77.
All of the nonliving parts of an ecosystem are _______.
a)
biography
b)
biotic
c)
abiotic
d)
biology
78.

David, Abigail, and Mia are studying about ecosystems. They are particularly interested in understanding energy flow. Can you explain to them what energy flow in ecosystems is?

a)

It's like when David eats food and his body releases energy as heat during cellular respiration.

b)

It's similar to how Abigail's houseplants get energy from the sun through photosynthesis.

c)

It's like Mia's flashlight converting chemical energy in the batteries to light energy.

d)

It's like the transfer of energy when David's pet cat eats a mouse, which had eaten grains. This is a simple example of energy flow through a food chain.

79.

During a school trip to a wildlife reserve, Benjamin, Arjun, and Charlotte observed various animals. They noticed a particular interaction between two species. Which of the following could be an example of a predator-prey relationship they might have observed?

a)

Eagles and mice.

b)

Sharks and fish.

c)

Lions and zebras

d)

Wolves and rabbits.

80.

Kai, Liam, and Scarlett found a fallen tree in the forest. They noticed that it was slowly breaking down. What type of organisms are responsible for this?

a)

Organisms that break down dead or decaying organic matter.

b)

Organisms that live in dead or decaying organic matter.

c)

Organisms that produce dead or decaying organic matter.

d)

Organisms that consume dead or decaying organic matter.

81.

During a science class, Sophia, William, and Elijah were discussing about ecosystems. Sophia asked, 'What is the primary source of energy for an ecosystem?'

a)

Wind

b)

Sunlight

c)

Water

d)

Soil

82.

While studying about food chains in their science class, Mia, Ethan, and Isabella were asked, 'What happens when the population of predators in an ecosystem increases significantly?'

a)

The population of prey increases.

b)

The population of prey decreases.

c)

The population of other predators increases.

d)

The population of other predators decreases.

83.

a single, linear path showing the flow of energy from the Sun to a producer and through different levels of consumers

a)

food chain

b)

food web

c)

energy pyramid

d)

trophic level

84.

overlapping food chains with different pathways to show the flow of energy through an ecosystem

a)

food web

b)

food chain

c)

energy pyramid

d)

trophic levels

85.

the position an organism occupies on the food web

a)

trophic level

b)

energy pyramid

c)

food chain

d)

ecosystem

86.

an organism that gets its energy by feeding on producers in the food chain

a)

primary consumer

b)

tertiary consumer

c)

secondary consumer

d)

decomposer

87.

an organism that must consume other organisms for nutrients

a)

consumer

b)

autotroph

c)

producer

d)

decomposer

88.

an organism that transforms the energy from the Sun and uses carbon dioxide and water to make food

a)

producer

b)

heterotroph

c)

decomposer

d)

consumer

89.

an animal that eats primary consumers (other animals that eat plants)

a)

secondary consumer

b)

tertiary consumer

c)

autotroph

d)

decomposer

90.

an organism that gets its energy by eating secondary consumers

a)

tertiary consumer

b)

primary consumer

c)

decomposer

d)

autotroph

91.

A community of organisms and their environment

a)

ecosystem

b)

biome

c)

energy pyramid

d)

food web

92.
Which of these is an example of a producer?
a)
snake
b)
worm
c)
human
d)
grass
93.
When a millipede breaks down dead and decaying material, it is acting as what?
a)
a decomposer
b)
an apex predator
c)
a producer
d)
prey
94.
Which animal is the apex predator in this food web?
a)
eagle
b)
mouse
c)
spider
d)
snake
95.
Which of these does most of the decomposing on Earth?
a)
bacteria and fungi
b)
millipedes
c)
worms
d)
roaches
96.

Put this food chain in the correct order

a)

Grass

b)

Grasshopper

c)

Shrew

d)

Snake

e)

Mountain Lion

1)
2)
3)
4)
5)
97.

Put this food chain in the correct order

a)

Grass

b)

Rabbit

c)

Snake

d)

Hawk

1)
2)
3)
4)
98.
Question Image

Match each organism with the correct trophic level

a)

Producer

1.

Grass

b)

Primary Consumer

2.

Squirrel

c)

Secondary Consumer

3.

Insect Eating Bird

d)

Apex Predator

4.

Mountain Lion

e)

Decomposer

5.

Bacteria

99.

Who makes their own food?

a)

The Sun

b)

Producers

c)

Consumers

d)

Decomposers

100.

Reorder the following from sun to tertiary consumer

a)
b)
c)
d)
e)
1)
2)
3)
4)
5)
101.

This question is confusing! Look carefully at the image. What trophic (energy) level is the secondary consumer?

a)

1st

b)

2nd

c)

3rd

d)

4th

102.

This question is confusing! Look CAREFULLY at the image. What trophic level is the PRIMARY consumer?

a)

1st

b)

2nd

c)

3rd

d)

4th

103.

What kind of organisms are usually primary consumers?

a)

plants

b)

herbivores

c)

carnivores

104.

What kind of organisms are usually at the top of the food chain?

a)

producers

b)

herbivores

c)

omnivores

d)

carnivores

105.

What defines a place where plants and animals live and grow naturally?

a)

Niche

b)

Habitat

c)

Ecosystem

d)

Abiotic Factor

106.

What does the figure represent?

a)

food chain

b)

habitat

c)

food web

d)

a cycle

107.

Study the diagram and identify the PRODUCER.

a)

mouse

b)

grasshopper

c)

grass

d)

hawk

108.

Study the diagram and identify one carnivore.

a)

fox

b)

mouse

c)

rabbit

d)

grass

109.

In the diagram, what do the arrows represent?

a)

abiotic relationships

b)

the predator-prey relationship

c)

the cycle

d)

transfer of energy

110.

In the figure, who is responsible for cycling oxygen into the atmosphere?

a)

producers

b)

consumers

c)

decomposers

d)

fungi

111.

A type of beetle was eating sugar cane crops in Australia and caused HARM. Which of the following best defines an organism that causes harm?

a)

carnivore

b)

invasive species

c)

prey

d)

decomposer

112.

Which of the following make holes in bread as it rises?

a)

yeast

b)

milk

c)

salt

d)

flour

113.

Which of the following are biotic factors in an ecosystem?

a)

rain, sunlight, and plants

b)

plants, animals, and bacteria

c)

temperature, animals, and plants

d)

animals, minerals in the soil, and rain

114.

What is a producer’s job in an ecosystem?

a)

to make food and oxygen for animals

b)

to help plants grow

c)

to break down dead plants and animals

d)

to eat plants and other animals and produce carbon dioxide

115.

Why are animals important to an ecosystem?

a)

They produce oxygen

b)

They eat bacteria

c)

The produce carbon dioxide

d)

They help break down dead plants

116.

What is the difference between a biotic factor and an abiotic factor?

a)

Biotic factors include elements like weather and temperature, while abiotic factors produce carbon dioxide and oxygen

b)

Biotic factors are living things and abiotic factors are non-living things

c)

Biotic factors exist in an ecosystem, but abiotic factors do not

d)

Biotic factors are non-living things and abiotic factors are living things

117.

Which of the following do omnivores eat?

a)

plants only

b)

plants and meat

c)

meat only

d)

they make their own food

118.

The primary consumers in a marine ecosystem.

a)

Phytoplankton

b)

Zooplankton

c)

Tertiary Consumers

d)

Apex Predators

119.

Which animal would you find in a freshwater ecosystem?

a)

A whale

b)

A shark

c)

An eel

d)

A frog

120.

Which of the following is a saltwater ecosystem?

a)

Swamp

b)

Pond

c)

Ocean

d)

Bog

121.

What is the difference between saltwater and freshwater ecosystems?

a)

Freshwater ecosystems don’t have plants, and saltwater ecosystems do.

b)

Saltwater ecosystems have a lot of salt, and freshwater ecosystems don’t.

c)

Animals can only live in one part of a saltwater ecosystem, but they can survive anywhere in a freshwater ecosystem.

d)

Freshwater ecosystems have three habitats, and saltwater ecosystems have one.

122.

Can a plant grow fruit if it gets no sunlight?

a)

Yes

b)

Depends on the plant

c)

No

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