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7th GRADE SCIENCE END OF YEAR REVIEW

Total questions: 80

Worksheet time: 47mins

Name
Class
Date
1.
Which structures are found in every living cell?
a)
cell membrane and cytoplasm
b)
chloroplasts and mitochondria
c)
a cell wall and nucleus
d)
chloroplasts and cell wall
2.

Which cell structure is found in plant and animals cells and controls what can come into or leave a cell?

a)

cell membrane

b)

cytoplasm

c)

nucleus

d)

vacuole

3.

What is the function of the cell nucleus found in both plant and animal cells?

a)

to produce energy

b)

to control cell activity

c)

to remove waste products

d)

to allow molecules to enter the cell

4.

What is one basic function of the vacuoles?

a)

circulating oxygen

b)

producing food

c)

controlling cell processes

d)

storing water

5.

Chloroplasts in plant cells allow the plant to perform a function that animal cells cannot do. What is the main function of the chloroplasts found in plant cells?

a)

to absorb light energy and manufacture food

b)

to remove waste materials by active transport

c)

to manufacture chemical energy from food

d)

to control the shape of the cell

6.

What is the function of a cell wall?

a)

to provide shape, protection and support for cell

b)

to perform different functions in each cell

c)

to prevent water from passing through it

d)

to prevent oxygen from entering the cell

7.

In what part of the plant cell does the process of photosynthesis take place?

a)

nucleus

b)

mitochondria

c)

chloroplasts

d)

vacuoles

8.
Which of the following is not part of the cell theory?
a)
cells must contain DNA 
b)
all living things are made from cells
c)
cells can only come from other cells
d)
cells are the basic unit of life
9.

During this process, cells use O2 and glucose to release energy. CO2 is a waste product.

a)

Cellular Respiration

b)

Respiration

c)

Peristalsis

d)

Chemical Digestion

10.

What body system is for support, protection, and creates new blood cells?

a)

skeletal system

b)

muscular system

c)

circulatory system

d)

integumentary system

11.

The main purpose of the ____________ system is to break food particles into pieces that can be used.

a)

circulatory

b)

respiratory

c)

digestive

d)

skeletal

12.
What body system makes your body move? 
a)
Circulatory
b)
Respiratory
c)
Skeletal
d)
Muscular
13.
What body system removes the waste from your body? 
a)
Circulatory
b)
Excretory
c)
Digestive
d)
Respiratory
14.
This system carries oxygen, nutrients and waste around the body.
a)
Lymphatic
b)
Urinary
c)
Respiratory
d)
Circulatory
15.
What is the main function of the respiratory system?
a)
to provide oxygen and remove carbon dioxide from the body
b)
to bring oxygen to the body
c)
to break down food and absorb nutrients
d)
to remove oxygen from the body and deliver carbon dioxide
16.

Your skin and hair are parts of your ___________

a)

endocrine system

b)

excretory system

c)

lymphatic system

d)

integumentary system

17.

Which set of organs belong to the Nervous System?

a)

Heart, blood vessels

b)

Kidneys, urinary bladder

c)

Esophagus, stomach, intestines

d)

Brain, spinal column

18.
How many parent(s)are needed for asexual?
a)
4
b)
1
c)
9
d)
100
19.
What are some of the facts 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
20.

What parts of the chromosomes code for traits, such as eye color, height, face features etc?

a)
Genes
b)
Deoxyribonucleic Acid
c)
Chromosomes
d)
Nucleus
21.

A mode of reproduction in which an organism arises from two organisms and inherits half of its DNA from each parent

a)

Sexual Reproduction

b)

Asexual Reproduction

c)

Cloning

d)

Fragmentation

22.
If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is -
a)
identical to only one parent
b)
identical to all of its siblings
c)
a unique combination of traits
d)
the recessive traits of each parent
23.
When comparing the offspring of sexually and asexually reproducing organisms, we would expect the genetic material (DNA) of the sexually reproducing organism to -
a)
contain fewer mutations
b)
be lesser in quantity
c)
be simpler overall
d)
show more variation
24.
Which of the following describes the main advantages of sexual reproduction? 
a)
requires lots of time/energy
b)
no new gene combos can arise 
c)
diversity
d)
looks identical to the parent
25.

Why might it be helpful for a species to have a lot of variations?

a)

They can't be seen by predators

b)

If the environment changes, they might be better able to adapt

c)

It is helpful in asexual reproduction

d)

They don't recognize each other

26.
1.  Darwin observed 13 species of finches on the Galapagos Islands.  What did Darwin conclude about the finches?
a)
a.  They evolved from a common ancestor.
b)
They all came from different continents.
c)
they evolved from 13 different types of birds.
d)
they developed from other types of organisms.
27.
1.  Why did the population of peppered moths in England change from light to dark after the Industrial Revolution?
a)
Light moths were killed by soot.
b)
Dark moths were produces by industrial processes.
c)
The birds that ate the dark moths were killed by the soot.
d)
Light moths were more obvious against the soot-stained trees.
28.

The purpose of selective breeding is to

a)

Get bigger animals and plants

b)

Get smaller animals and plants

c)

Create animals and plants with desirable traits

d)

Create animals and plants with bad traits

29.

All of the following statements are reasons for selective breeding EXCEPT:

a)
To produce offspring with desirable characteristics
b)
Farmers increase their profit by improving crops
c)
To improve the quality of food products
d)
To increase migration patterns
30.
Why is a deer classified as a herbivore?
a)
A deer makes its own food.
b)
A deer eats only plants.
c)
A deer eats only animals.
d)
A deer eats plants and animals.
31.
Why is a racoon classified as an omnivore?
a)
A racoon eats only animals.
b)
A racoon eats only plants.
c)
A racoon makes its own food.
d)
A racoon eats plants and animals.
32.
What is the role of a producer?
a)
Use sunlight to make food
b)
Gain energy from eating other organisms
c)
Keep other species from overpopulating
d)
Breaking down dead stuff 
33.
What is the role of decomposers in a food chain?
a)
Use sunlight to make food
b)
Eat other organisms to gain energy
c)
Make the food for the whole food chain
d)
Break down dead organisms and add nutrients to the soil
34.
What do the arrows show in a food chain picture?
a)
They always point to the smallest animals.
b)
They point to the animal that tastes the best.
c)
They always point to the producers.
d)
They point in the direction that energy is flowing.
35.

Biodiversity, aka biological diversity, usually refers to

a)

the same species in a general location

b)

the number of different species in a given area

c)

the number of animal species in a given area

d)

the number of plant species in a given area

36.

Succession that occurs in areas that previously didn't support life, such as on rocks or ice

a)

tangential succession

b)

primary succession

c)

secondary succession

d)

quaternary succession

37.

A common type of succession that occurs where an event such as a forest fire has occurred, or a farmer's field has been abandoned is called

a)

common succession

b)

primary succession

c)

secondary succession

d)

Quaternary succession

38.

Which of the following describes the IMPORTANCE of biodiversity to an ecosystem?

a)
a. People like to be able to see all the different plants and animals
b)

b. If there aren't all the different species, there will be resources that aren't being used

c)
c. Biodiversity is not as important as many people think
d)

d. Biodiversity can help minimize the effects of losing a species and provides more food options.

39.
 Which biome is more likely to survive a change in the environment?
a)
High (rich) biodiversity
b)
Low (poor) biodiversity
40.
Biodiversity includes 3 components, Ecosystem Diversity, Species Richness and Genetic Diversity
a)
True
b)
False
41.
Soil and rock act as giant sponges because they are full of tiny pores and cracks that hold underground water.  These small pores allow the water to infiltrate and collect underground.   Rain and snowmelt that infiltrates the ground is called
a)
backflow
b)
groundwater
c)
spongate
d)
infiltrate
42.
How does water get into the ground?
a)
evaporation
b)
infiltration
c)
precipitation
d)
condensation
43.
How does water get into the atmosphere?
a)
precipitation
b)
evaporation
c)
infiltration
d)
condensation
44.
How do lichens contribute to primary succession?
a)
Lichens decompose organic matter from animals and plants
b)
Lichens begin to break down rock to form soil
c)
Lichens are nitrogen fixing bacteria
d)
Lichens convert carbohydrates into fossil fuels.
45.
What is formed during primary succession that doesn't need to be formed during secondary succession?
a)
pioneer species
b)
soil
c)
climax community
d)
lichens
46.
Which number represents the mitochondria?
a)
1
b)
7
c)
4
d)
2
47.
Which number represents the chloroplasts? 
a)
7
b)
2
c)
8
d)
5
48.
Which number represents the cell wall?
a)
6
b)
5
c)
8
d)
2
49.
Which organism is likely to be at the beginning of a food chain for a pond?
a)
Sunfish
b)
Freshwater shrimp
c)
Paramecium
d)
Green Algae
50.
What does an energy pyramid represent?
a)
Food pyramids show the different food chains in a community.
b)
Energy pyramids show the same total matter at all levels.
c)
Shows the amount of energy available at each feeding level in an ecosystem.
51.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
52.
What is the purpose of a dichotomous key?
a)
to find a common ancestor
b)
to show the evolution of organisms
c)
to show relationships between organisms
d)
to identify organisms
53.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
54.
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
a)
Coleoptera
b)
Heteroptera
c)
Diptera
d)
Lepidoptera
55.

Which leaf is shown in the drawing?

a)

Magnolia

b)

Redbud

c)

Sweetgum

d)

None of the above

56.
What does biodiversity mean?
a)
Only one species in an area.
b)
The different amount of species in an area
c)
All abiotic life
d)
Nitrogen fixation
57.
a)
High Pressure
b)
Warm Front
c)
Cold Front
d)
Mountains
58.
a)
High Air Pressure
b)
High Temperatures
c)
Heavy Rain
d)
Hail
59.
a)
Low Clouds
b)
Low Temperatures
c)
Light Wind
d)
Low Air Pressure
60.
a)
Warm Front
b)
High Air Pressure
c)
Cold Front
d)
High Temperatures
61.

Which two cities are most likely to experience clear, dry weather?

a)

Seattle & San Francisco

b)

Chicago & Minneapolis

c)

Chicago & Nashville

d)

Dallas & Houston

62.
Referring to the table, what is the relative mass of a proton?
a)
10
b)
1
c)
0.1
d)
0.01
63.
Referring to the table, what is the relative charge of an electron?
a)
+1
b)
0
c)
-1
d)
-0.5
64.
Referring to the table, what is the relative charge of a proton?
a)
+1
b)
0
c)
-1
d)
-0.5
65.
For a given element, the atomic number indicates the number of _____
a)
protons in the nucleus
b)
neutron in the nucleus
c)
electrons in the atom
d)
nucleons in the atom
66.
The nucleus contains _____
a)
only protons
b)
protons and neutrons
c)
protons and electrons
d)
electrons and neutrons
67.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
68.

The systems main functin is to control long term body functions such as growth, puperty, metabolism etc.

a)

integumentary

b)

excretory

c)

circulatory

d)

endocrine

69.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
70.
When you stretch a rubber band, you are storing __________ energy. 
a)
kinetic 
b)
potential
c)
none of the above
d)
all of the above 
71.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
72.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
73.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
74.
At which point is kinetic energy greatest? 
a)
W
b)
X
c)
Y
d)
Z
75.

Match the description to the graph:

"The car is stopped."

a)
b)
c)
d)
76.

This system secretes chemical messages (hormones) to different parts of the body.

a)

excretory

b)

endocrine

c)

digestive

d)

immune

77.
A diagram of a food web is shown below.Which organism receives the least amount of energy from the producers?
a)
Hawk
b)
Rabbit
c)
Grasshopper
d)
Mouse
78.

Which two organisms compete for the rabbit for energy?

a)

Mouse and Tree

b)

Owl and Goat

c)

Wildcat and Jackal

d)

Lion and Jackal

79.
A consumer gets energy by
a)
absorbing sunlight.
b)
breaking down dead organisms.
c)
soaking it up from the ground.
d)
feeding on other organisms.
80.

A team of ecologists observed feeding patterns of several populations in the desert. Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?

a)

There is less energy in the producers because they are at the bottom.

b)

There is more energy in the producers because they provide energy for all the consumers in the ecosystem.

c)

There is more energy available in the tertiary consumers because they need the energy to hunt.

d)

There is more energy in the level containing the top predators because they are larger in size.

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