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Life Science CFE Review 2024

Total questions: 126

Worksheet time: 3hrs 51mins

Name
Class
Date
1.

A student wants to perform a science experiment about plants. He wants to know if a certain type of soil will make plants grow taller. Each pot will receive a different type of soil, but will get the same type of seed, water amount, and sunlight amount.What is the Independent Variable in this story?

a)

Amount of sunlight

b)

How tall the plant will grow

c)

Amount of water

d)

Type of material the plant is growing in

2.

What do you measure for results (outcome)?

a)

Dependent variable

b)

Hypothesis

c)

Experimental Group

d)

Constants

3.

Why is it important to have constants in an experiment?

a)

To make sure the experiment is fair

b)

Constants are not needed for experiments.

c)

To measure the dependent variables all at once

d)

To test many variables at a time

4.

This bar graph shows the number of cheeseburgers sold at McYummies drive thru last week. Study the graph and answer the following question.

What was the maximum number of burgers sold, and on which day was this?

a)

30 burgers on Tuesday

b)

60 Burgers on Thursday

c)

20 Burgers on Thursday

d)

25 Burgers on Monday

5.

Why do many experiments include several trials instead of a single trial?

a)

Repetition of trials increases the accuracy of the results

b)

Repetition of trials decreases the sample size of the experiment.

c)

Repetition of trials makes data easier to analyze.

d)

It is not necessary to repeat trials

6.

1. Aside from repeating a scientific experiment, what else must a scientist do to increase the accuracy of the results?

a)

Change the hypothesis

b)

Share data with other scientists for them to repeat or replicate

c)

Analyze the data faster

d)

Keep the data for themselves

7.

Anna is in charge of studying how the amount of plant food (fertilizer) affects the height of a plant at a local garden. Which testable statement does she investigate?

a)

There is no way to test this hypothesis.

b)

If a plant receives two cups of food per day, then the height of the plant will increase

c)

If a plant gets different amounts of water and two cups of food per day, the height of the plant will increase

d)

If a plant receives more sunlight, the height of the plant will decrease

8.

How is a hypothesis different from a theory?

a)

A theory has evidence to back it up and a hypothesis is an educated guess as to what is going to happen.

b)

They are both the same. They both are guesses as to what happens in the natural world.

c)

A theory is an opinion about how something works but a hypothesis has scientific evidence to support it.

d)

A hypothesis is used in science and a theory is used in society.

9.

A statement that describes what scientists expect to happen every time under a particular set of conditions is a

a)

scientific inquiry

b)

scientific hypothesis

c)

scientific theory

d)

scientific law

10.
Jonathan and Renier dropped a rubber ball from the same height onto six different surfaces.  They measured the height of each bounce and recorded their data.  The graph shows their data.  Based on the data, which of the following is the best conclusion?
a)
All balls bounce higher indoors than they do outdoors.
b)
The surface has no affect on the height of the bounce.
c)
A rubber ball does not bounce as high as a super ball.
d)
A rubber ball bounces higher on harder surfaces.
11.

How many variables should be changed in an experiment?

a)
5
b)
3
c)
1
d)
6
12.
Amanda makes the following hypothesis:  If the humidity increases, it will help plants grow.  Which of these describes a controlled experiment that would best help Amanda prove or disprove her hypothesis?
a)
recording the number of tall plants and short plants in different fields that have different humidity levels
b)
observing plant growth in a greenhouse with a constant humidity and in a greenhouse with changing humidity
c)

measuring the temperatures and humidity in a greenhouse that has both short and tall plants growing in it

d)

making a model to observe whether water collects on the walls of a greenhouse with increasing humidity

13.
Scientists who study hurricanes sometimes fly into the hurricanes to take readings from inside the storm.  How does this differ from most scientific research?
a)
Hurricane scientists cannot control variables.
b)
Hurricane scientists cannot collect data.
c)
Hurricane scientists cannot draw conclusions.
d)
Hurricane scientists cannot make hypotheses.
14.
Like scientific knowledge, scientific theories can ___________ over time.
a)
never change
b)
change
c)
evolve
15.

A set of principles that explains and predicts a phenomena is called a (a)   . 

Choose from the below words
scientific law
scientific method
scientific theory
scientific instructor
16.

Someone is cold and shivers. Which systems are at work together?

a)

Respiratory and Skeletal

b)

Nervous and Muscular

c)

Nervous and Circulatory

17.

What is the smallest unit of life?

a)

atom

b)

organ

c)

tissue

d)

cell

18.

Drag the images to match the labels

a)
1.

Cell

b)
2.

Tissue

c)
3.

Organ

d)
4.

Organ System

e)
5.

Organism

19.

Which system takes in information through the 5 senses?

a)

Nervous

b)

Respiratory

c)

Circulatory

d)

Digestive

20.

Which system is responsible for the absorption of nutrition?

a)

Circulatory

b)

Integumentary

c)

Digestive

d)

Respiratory

21.

Receives stimuli and transports impulses, coordinates actions and reactions in the body

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

22.

Supports and provides structure for the body

a)

Skeletal

b)

Muscular

c)

Circulatory

d)

Respiratory

23.

Supplies blood with oxygen and rids the body of carbon dioxide

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

24.
Which best compares the respiratory system to the circulatory system?
a)
The respiratory system transports oxygen to cells, while the circulatory system provides oxygen for cells.
b)
The respiratory system provides oxygen for cells, while the circulatory system transports oxygen to cells.
c)
The respiratory system breaks down food for cell energy, while the circulatory system rids the body of waste.
d)
The respiratory system rids the body of waste, while the circulatory system breaks down food for cell energy.
25.
Which two human body systems are most responsible for getting oxygen to cells?
a)
digestive and skeletal
b)
skeletal and circulatory
c)
circulatory and respiratory
d)
respiratory and digestive
26.
Which best explains why both cats and humans are multicellular organisms?
a)
They get energy from many food sources.
b)
They get energy from a single food source
c)
They need only one cell to meet their basic needs.
d)
They need many cells working together to meet their basic needs.
27.
Which body systems work together to allow the body to move?
a)
nervous and skeletal
b)
muscular and skeletal
c)
nervous and circulatory
d)
muscular and circulatory
28.

The _____ system is a transport system, carrying oxygen, carbon dioxide, and wastes to and away from cells using the heart and blood.

a)

endocrine

b)

circulatory

c)

respiratory

d)

excretory

29.

The ______ system removes the body's wastes through the kidneys (cell wastes), digestive (feces), respiratory (CO2), and integumentary (salts/sweat)

a)

excretory

b)

digestive

c)

respiratory

d)

circulatory

30.
This system is the body's defense against attack.
a)
endocrine
b)
excretory
c)
muscular
d)
immune
31.

In what way are the digestive and circulatory systems alike?

a)

Both protect organs in the body.

b)

Both control movement of the body.

c)

Both absorb gases or nutrients into the body.

d)

Both provide structural support for the body.

32.

What is the function of the digestive system?

a)

It transports blood and oxygen to your cells

b)

It breaks down food so the nutrients can be absorbed by your body

c)

It helps you breathe by taking in oxygen and transporting carbon dioxide out of your body

d)

It helps you move

33.

Which body system protects the organs of the body?

a)

digestive

b)

respiratory

c)

skeletal

d)

muscular

34.

How is a theory in science different from a theory in everyday life?

a)

A theory in science is less accurate

b)

A theory in science and in real life are the same

c)

A theory in science is more accurate

35.

What most likely caused the finches on the Galapagos Islands to have beaks that were different from the finches on the mainland?

a)

There were different types of predators on the island.

b)

There were different types of food available on the island.

c)

The finches had no water to drink.

d)

The finches on the mainland could not fly high enough.

36.

True or False? In Natural selection an animal chooses to adapt in a single generation, and survives.

a)

true

b)

false

37.

When looking at two tree frogs of the same species, a slight difference was observed within members of the same species. This is called _____________.

a)

replicating

b)

variations

c)

fossils

d)

clone

38.

What most likely happened to species that are found in the fossil record but have no living members?

a)

They had offspring of a different species.

b)

They became extinct.

c)

They never really existed.

d)

They mutated to other species.

39.

The preserved remains or physical evidence of an organism that lived in the past are called ______________.

a)

variations

b)

fossils

c)

homologous structures

d)

evolutionary features

40.
Where the better adapted organisms survive to pass traits along to offspring.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artifical Selection
41.
Why are advantageous traits more likely to be passed onto offspring?
a)
Because they are more likely to survive and reproduce.
b)
Because they come from dominant alleles.
c)
Because they come from recessive alleles.
d)
Because the trait is an acquired phenotype.
42.
The diagram shows fossils in different rock layers. Which of these statements about the age of these fossils is most likely correct?
a)
Fossil A and C are the same age
b)
Fossil B is older than fossil C
c)
Fossils A is older than fossil B
d)
Fossil D is older than fossil C
43.

The correct order of classification from the BROADEST group to the most narrow is:

a)

Species, Genus, Family, Order, Class, Phylum, Kingdom

b)

Kingdom, Phylum, Class, Family, Order, Genus, Species

c)

Domain, Kingdom, Family, Order, Phylum, Class, Genus, Species

d)

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

44.

An organism that LACK a NUCLEUS (NO NUCLEUS)

a)

Eukaryote

b)

Prokaryote

c)

Heterotroph

d)

Autotroph

45.

Which Domain/Kingdom is capable of living in EXTREME ENVIRONMENTS like hot springs, geysers, or very salty waters?

a)

Bacteria

b)

Eukarya

c)

Archaea

46.
Which kingdom contains only multicellular autotrophs?
a)
fungi
b)
plant
c)
animal
d)
protist
47.
What do plants and fungi have in common?
a)
They are both autotrophic
b)
They are both unicellular
c)
They both have cell walls
d)
They both are prokaryotes 
48.
What taxa are in a scientific name?
a)
Genus and Kingdom
b)
Species and Family 
c)
Species and Class
d)
Genus and Species
49.

Which statement was NOT included in cell theory?

a)

All living things are composed of cells.

b)

Living cells come only from other living cells.

c)

Each cell contains a cell membrane, cytoplasm, nucleus, mitochondria, and endoplasmic reticulum.

d)

Cells are the smallest structure of living things that can perform the functions necessary for life.

50.
Which of the following is NOT a cell theory.
a)
All non-living things are made of cells
b)
All cells come from pre-existing cells
c)
Cells are the basic unit of structure and function of all living things
51.

Which statement describes the ability of the cell membrane to allow various substance to move through it?

a)

The cell membrane is selectively permeable.

b)

The cell membrane is NOT selectively permeable.

52.

Cells must be able to perform certain functions in order to survive. Which of the following must all cells do to survive?

a)

obtain energy

b)

absorb wastes

c)

utilize oxygen

d)

continue growing

53.

Cell membranes are semi-permeable because they allow only certain particles to cross into or out of the cell.

a)

True

b)

False

54.

___ is the maintenance of an internal balance of conditions in a changing external environment.

a)

Diffusion

b)

Endocytosis

c)

Passive transport

d)

Homeostasis

55.

What is the function of the cell membrane in maintaining homeostasis?

a)

Regulates movement of substances

b)

Transports oxygen in the blood

c)

Produces energy for the cell

d)

Stores genetic information

56.

Which organelle is known as the powerhouse of the cell?

a)

endoplasmic reticulum

b)

mitochondria

c)

chloroplast

d)

nucleus

57.

What is the function of the nucleus in maintaining homeostasis?

a)

Store and transmit genetic information

b)

Produce energy for the cell

c)

Maintain cell shape and structure

d)

Control and regulate cell's activities

58.

Which organelle is responsible for producing energy in the form of ATP?

a)

mitochondria

b)

nucleus

c)

chloroplast

d)

endoplasmic reticulum

59.

How do organelles help in maintaining homeostasis in a cell?

a)

Organelles have no role in maintaining homeostasis in a cell.

b)

Organelles perform specific functions to regulate the cell's internal environment and ensure its proper functioning.

c)

Organelles hinder the cell's ability to maintain homeostasis.

d)

Organelles only maintain homeostasis in certain types of cells.

60.

What happens to a cell if it fails to maintain homeostasis?

a)

The cell can experience dysfunction and potentially cell death.

b)

The cell will become stronger and more resilient.

c)

The cell will divide and multiply rapidly.

d)

The cell will become resistant to external stimuli.

61.

Rigid layer that surrounds the cell of plants and some other organisms such as fungi

a)

Cell Wall

b)

Golgi Apparatus

c)

Chloroplast

d)

Cell Membrane

62.

Which is a characteristic of living things?

a)

They breathe.

b)

They have skin.

c)

They can move.

d)

They respond to their environments.

63.

Which cell parts are not present in animal cells?

a)

cell membrane & cytoplasm

b)

nucleus & chloroplasts

c)

cell wall & chloroplasts

d)

ribosomes & mitochondria

64.

Which organelle is the site of photosynthesis?

a)

Cell Wall

b)

Chloroplasts

c)

Cytoplasm

d)

Cell Membrane

65.
Plant and animal cells are identical. 
a)
True
b)
False
66.
Clear thick jelly like materia
a)
cytoplasm
b)
nucleus
c)
vacuoles
d)
cell  wall
67.
store large amount of food, sugar and water
a)
Nucles
b)
vacuoles
c)
cell wall
d)
cell membrane
68.

Which of the following statements about chromosomes is correct?

a)

Chromosomes are long, thread-like structures

b)

Chromosomes are found in the nucleus of all cells in the human body

c)

Chromosomes contain DNA

d)

All of the above

69.

What is a short segment of a DNA strand that codes for our characteristics?

a)

chromosome

b)

DNA

c)

RNA

d)

gene

70.

Where is DNA found in a human cell?

a)

ribosome

b)

nucleus

c)

cell membrane

d)

cytoplasm

71.

How many alleles (letters) does a child get from each parent?

a)

1

b)

2

c)

3

d)

4

72.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
73.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
74.
AA and Aa always show up as
a)
dominant
b)
recessive
75.
aa always shows up as
a)
dominant
b)
recessive
76.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
77.
In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?
a)
100% purple flowers
b)
100% white flowers
c)
75% white flowers, 25% purple flowers
d)
25% white flowers, 75% purple flowers
78.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
79.
What do we use pedigrees for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
80.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
81.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
82.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
83.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
84.

After mitosis is complete, the new cells:

a)
are all identical
b)
are all different
c)
are half identical and half different
d)
are all stretched out
85.
After meiosis is complete, the new cells:
a)
are all identical
b)
are all different
c)
are half identical and half different
d)
are all stretched out
86.
What is an advantage of sexual reproduction over asexual reproduction?
a)
It increases diversity in the population, making it more adaptable to changing environments. 
b)
It is better for all organisms to be the same.
c)
It happens faster.
d)
It helps skin cells divide faster to heal wounds.
87.
The process on the left is:
The process on the right is:
a)
Left: meiosis
Right: meiosis
b)
Left: meiosis
Right: cloning
c)
Left: mitosis
Right: meiosis
d)
Left: mitosis
Right: mitosis
88.
Which is true about asexual reproduction?
a)
Takes only one mate to reproduce and takes a longer time to reproduce
b)
Takes a shorter amount of time to reproduce and it takes two mates to reproduce
c)
Reproduces diverse offspring and takes a longer time to reproduce
d)
Takes only one mate to reproduce and takes a shorter time to reproduce
89.

In eukaryotes, which organelle is DNA usually found in?

a)

cell membrane

b)

vacuole

c)

chloroplast

d)

nucleus

90.

 Which of the following requires only ONE parent creating a clone of themselves-no diversity, large amounts of offspring?

a)

Asexual reproduction

b)

Meiosis

c)

Sexual reproduction

d)

DNA Replication 

91.

 Which of these combinations identifies the appropriate labels in the order as shown in the diagram (1,2,3)?

a)

Chromosome, Gene, DNA

b)

Chromosome, DNA, Gene

c)

DNA, Chromosome, Gene

d)

DNA, Gene, Chromosome

92.
What gas do producers need in order to perform photosynthesis?
a)
oxygen
b)
carbon dioxide
c)
hydrogen
d)
nitrogen
93.
What gas do producers give off as a result of photosynthesis?
a)
oxygen
b)
carbon dioxide
c)
hydrogen
d)
nitrogen
94.
In which organism(s) does respiration occur?
a)
plants
b)
animals
c)
fungus
d)
all of these
95.
What gas is needed in order to perform respiration at the cellular level?
a)
oxygen
b)
carbon dioxide
c)
hydrogen
d)
nitrogen
96.
How do plants get the carbon that they need?
a)
from the air
b)
from water
c)
from the soil
d)
from fertilizer
97.
How do animals get the carbon that they need?
a)
from the air
b)
from water
c)
from the soil
d)
from their food
98.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
99.
How can photosynthesis be related to cellular respiration?
a)
What's produced (made) by one is needed (the reactants) for the other
b)
They both produce the same products
c)
They both have the same reactants (need the same things)
d)
These 2 processes have nothing in common
100.
The main source of energy for all life comes from ____.
a)
the Earth
b)
the moon
c)
the sun
d)
the food we eat/make
101.
What are the products of photosynthesis?
a)
Carbon dioxide and water
b)
Carbon dioxide and oxygen
c)
Glucose and oxygen
d)
Glucose and water
102.
Why do plants go through photosynthesis?
a)
To make food for us
b)
To make food for themselves
c)
They're bored and have nothing else to do
103.
Which of the following is the correct equation for CELLULAR RESPIRATION?
a)
Sugar + O2 --> CO2 + H2O + ATP
b)
ATP + O2 --> CO2 + H2O + sugar
c)
Sugar + CO2 --> O2 + H2O + ATP
d)
Sugar + H2O + O2 --> CO2 + O2 + ATP
104.

What is the compound that plants use to absorb the energy from light?

a)

Chlorophyll

b)

H2O

c)

DNA

d)

Nitrogen

105.

How can the law of conservation of energy be expressed in the case of a chemical reaction?

a)

total energy before the reaction is always less than the total energy after the reaction

b)

total energy before the reaction is always greater than the total energy after the reaction

c)

total energy before the reaction is always equal to the total energy after the reaction

d)

energy cannot be measured in a chemical reaction

106.

How does Carbon in the grass become part of a Tertiary consumer?

a)

The lion eats the grass

b)

The carbon ends up in the lion's food chain

c)

Carbon from grass does not end up in the lion's food chain

d)

The lion breathes in carbon dioxide given out by the plants

107.

There is a cypress trees in Florida with a tree trunk diameter of about 3.5 m. What is the source of most of the carbon in the cypress tree?

a)

The carbon created by the tree during photosynthesis.

b)

The carbon stored in tree seeds.

c)

The carbon dioxide molecules the tree absorbed from the atmosphere.

d)

The nutrients containing carbon that the tree absorbed from the soil.

108.

Which of the following best explains how plants follow the Law of Conservation of Mass during photosynthesis?

a)

The reaction uses energy to produce a product without energy.

b)

A gas (carbon dioxide) and a liquid (water) use energy to produce a solid (carbohydrates).

c)

The amount of each element that begins photosynthesis equals the amount of each element that is produced.

d)

The amount of carbohydrates at the beginning of photosynthesis equals the amount of oxygen that is produced.

109.

The atmosphere and the ocean are the two main carbon reservoirs.

a)

True

b)

False

110.

Carbon is not created nor destroyed in the carbon cycle.

a)

True

b)

False

111.

What is NOT an example of limiting factors?

a)

Predation

b)

Food Source

c)

Space

d)

Migration

112.

If humans destroys all of the Sea Turtles nesting sites, what is going to happen to the Sea Turtles?

a)

Increase

b)

Decrease

c)

Stay the same

d)

Sea Turtles don't need to nest

113.

What would happen to the hedgehog population if more foxes were introduced to the population?

a)

Increase

b)

Decrease

c)

Stay the same

d)

What are hedgehogs?

114.

What would happen to the bird population if mouse population increased?

a)

Increase

b)

Decrease

c)

Stay the same

d)

What is a mouse?

115.

Which of the following is a tertiary consumer in this food web?

a)

Rabbit

b)

Hedgehog

c)

Fox

d)

Bacteria

116.

A relationship between two organisms in which one organism benefits and the other is unharmed...

a)

Mutualism

b)

Commensalism

c)

Parasitism

117.

A relationship between two organisms in which both organisms benefit.

a)

Mutualism

b)

Commensalism

c)

Parasitism

118.

A relationship between two organisms in which one is benefited and the other is harmed.

a)

Mutualism

b)

Commensalism

c)

Parasitism

119.
In this food web, the grasshopper and the mouse have this relationship:
a)
mutualism
b)
commensalism
c)
competition
d)
predation
120.
In this food web, the snake and the mouse have this relationship
a)
mutualism
b)
commensalism
c)
predation
d)
parasitsm
121.

Which animal has the least amount of energy?

a)

Eagle

b)

Lizard

c)

Gradd

d)

Rabbit

122.

What is the role on decomposers?

a)

Eat plants

b)

Break down dead animals and material

c)

Produce their own food

d)

Eat every animal under it

123.

Shrubs in a meadow use sunlight to produce their own food. What role is the organism performing in this ecosystem?

a)

consumer

b)

producer

c)

decomposer

124.

in a prairie ecosystem, nitrogen and other matter build up in animal wastes. Which organisms return this matter to the ecosystem by breaking down wastes?

a)

producers

b)

decomposers

c)

primary consumers

d)

secondary consumers

125.

What is a lion?

a)

autotroph

b)

heterotroph

126.

What is asparagus?

a)

autotroph

b)

heterotroph

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Science Exam Fall Semester

129 questions

Science Exam Fall Semester

quiz

Worksheet

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8th Grade

Science Prefixes

126 questions

Science Prefixes

quiz

Worksheet

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7th - 8th Grade

7th Grade Science Final Exam Review

123 questions

7th Grade Science Final Exam Review

quiz

Worksheet

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6th - 8th Grade

Forces and Motion HMH Review

123 questions

Forces and Motion HMH Review

quiz

Worksheet

•

7th - 8th Grade

Earth Science Finals Review

124 questions

Earth Science Finals Review

quiz

Worksheet

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6th Grade

YEAR 9 SCIENCE- BIOLOGY

131 questions

YEAR 9 SCIENCE- BIOLOGY

quiz

Worksheet

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8th Grade