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Science Final Exam - 7th grade

Total questions: 90

Worksheet time: 2hrs 6mins

Name
Class
Date
1.

What is the equation for photosynthesis?

​ ​ (a)   (gas) + ​ (b)   ---> light/chrolophyll ---> ​ (c)   + ​ (d)   (gas)

Choose from the below words
Carbone Dioxide (C02)
water
glucose
Oxgen
2.

At night photosynthesis stops but plant still carry out another chemical reaction which affects the levels of the two gases. What is the name of this reaction ?

(a)  

3.

Neil is making syrup by dissolving sugar in water in a beaker.

Identify the components:

a)

Solvent

1.

Water

b)

Solution

2.

Syrup

c)

Solute

3.

Sugar

4.

Neil is making syrup by dissolving sugar in water in a beaker.

What could Neil do to help the sugar dissolve better ?

a)

Stir up the mixture

b)

Heat it up

c)

Add sand

d)

Add salt

5.

Label these parts of the hot chocolate process!

a)

Solute

b)

Solvent

c)

Solution

1
2
3
1)
2)
3)
6.

solute + solvent =

a)

solution

b)

equation

7.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
8.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
9.

Reorder the following. Put these in order that food follows as it passes through the digestive system.

a)

mouth

b)

esophagus

c)

stomach

d)

small intestine

e)

large intestine

1)
2)
3)
4)
5)
10.

Match the parts of the body to the function.

a)

Teeth

1.

Grind up Food

b)

Stomach

2.

Churns up food and mixes it with acid

c)

Small intestine

3.

Absorb nutrients into the blood stream

d)

Large intestine

4.

Absorb water from the food waste

e)

Gullet

5.

Move food to the next part of disgestion

11.

Match the following

a)

Atom

1.

Smallest particle that makes up matter.

b)

Element

2.

Matter containing only one type of atom

c)

Molecules

3.

Atoms join together to form new particle

d)

Compounds

4.

Combined atoms from different elements

12.

Here is a model of cinnamon molecules and water molecules. Do the cinnamon molecules dissolve in water? How do you know?

a)

Yes; the molecules attract to each other

b)

No; the molecules are not attracted to each other.

13.
Question Image

What do the various pictures represnt ?

a)

a pure element

1.

A

b)

a pure compound

2.

B

c)

a compound composed of 3 elements

3.

C

d)

a mixture of an element and various compounds

4.

D

14.
a)

Element

b)

Compound

c)

Mixture

15.
a)

Element

b)

Compound

c)

Mixture

16.
a)

Compound

b)

Element

c)

Mixture

17.
a)

Element

b)

Compound

c)

Mixture of elements

d)

Mixture of compounds

18.
a)

Compounds

b)

Mixture of elements

c)

Mixture of compounds

d)

Mixture of elements and compounds

19.

Why does stirring a solution help in dissolving a solute faster?

a)

It increases the temperature of the solution.

b)

It helps in breaking down the solute particles and spreading them evenly in the solvent.

20.

How would you separate the mixture and recover both components ?

a)

1.

Use distillation

b)

2.

Use a paper filter

c)

3.

Use a sieve

d)

4.

Use a magnet

21.

Match the layer to its thickness.

a)

Crust

1.

4-40 km

b)

Mantle

2.

2900 km

c)

Outer Core

3.

2200 km

d)

Inner Core

4.

1200-1500 km

22.

Rock cycle

a)

Igneous Rock

b)

Sediments

c)

Sedimentary Rock

d)

Metamorphic Rock

e)

Magma

1
2
3
4
5
1)
2)
3)
4)
5)
23.

The table shows the volume percentages of four samples of atmospheric gas. Which sample BEST represents the composition of Earth's atmosphere?

a)

1

b)

2

c)

3

d)

4

24.

Which of these circuits is a series circuit?

a)
b)
c)
d)
25.

What is the total resistance in a series circuit with three resistors of 2 ohms, 3 ohms, and 5 ohms?

a)

10 ohms

b)

9 ohms

c)

5 ohms

d)

15 ohms

26.

Students constructed a circuit using different-colored lightbulbs. What will happen if Switch 3 is closed and the other switches are left open?

a)

Only the white bulb will operate

b)

None of the bulbs will operate

c)

Only the white and yellow bulbs will operate

d)

Only the red and blue bulbs will operate

27.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
28.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
29.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
30.
Parallel circuits are
a)
a circuit that has only one path for current to travel
b)
has more than one path for current to travel
c)
a circuit that does not allow electricity to travel through it
d)
magnets that cause electric current
31.

Why is electrical wiring usually made from copper?

a)

Because copper is shiny

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulate electricity

32.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
33.

What is the PRODUCT of the process used by producers that is passed on as energy throughout an ecosystem?

a)

photosynthesis

b)

Sun

c)

glucose

d)

carbon dioxide

e)

water

34.

Match the following

a)

Decomposer

1.

This is an organism that breaks down and gains nutrients from dead organisms.

b)

Predator

2.

This is an animal that lives by preying on other animals.

c)

Producer

3.

This is an organism that supplies matter and energy, also known as an autotroph.

d)

Consumer

4.

This is an organism that relies on other organisms for its food and energy supply; heterotroph

e)

Parasite

5.

This is an organism which feeds on, but usually does not kill, a larger organism

35.

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

a)

it increases

b)

it decreases

c)

it remains the same

36.
Series of steps in which organisms transfer energy by eating and being eaten
a)
foodweb
b)
consumer
c)
food chain
d)
omnivore
37.
What may happen if the snowshoe hare was removed from the food web pictured?
a)
The insects in the habitat would increase.
b)
The shrew population would decrease due to being only hawk food source.
c)
The willow tree population would decrease.
d)
Foxes would dies due to no food source. 
38.

What is A?

a)

Omnivore

b)

Consumer

c)

Secondary Consumer

d)

Producer

39.

What is the correct order?

a)

Primary Consumers, Prouducers, Secondary Consumers, Tertiary Consumers.

b)

Producers, Primary Consumers, Seconday Consumers, Tertiary Consumers.

c)

Tertiary Consumers, Secondary Consumers, Primary Consumers, Producers.

d)

Producers, Tertiary Consumers, Primary Consumers, Secondary Consumers.

40.

In the diagram, which organism provides nutrients for the

largest number of other organisms?

a)

Seal

b)

Herring

c)

Snapper

d)

Bluefish

41.
If the voltage across the battery was 10V in this diagram. What would the voltage across each bulb be?
a)
10V
b)
5V
c)
20V
d)
0V
42.
If the cell provides 12 volts and there are four identical bulbs, each bulb will use ___ volts.
a)
12
b)
1
c)
4
d)
3
43.

Adding more bulbs to a series circuit will make each bulb shine

a)

Less brightly

b)

More brightly

c)

The Same

44.

Adding more bulbs to a parallel circuit will make each bulb shine

a)

Less brightly

b)

More brightly

c)

The same

45.

What is the unit of measurement for resistance?

a)

Voltage

b)

Ampere

c)

Watts

d)

Ohms

46.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

47.

which picture shows the correct reaction of the magnets ?

a)

Attract

b)

Attract

c)

Attract

d)

Repel

48.
As the resistance in a circuit increases, the electric current __________.
a)
increases
b)
decreases
c)
stays the same
49.
Electric current is measured in ______.
a)
Watts
b)
Volts
c)
Amperes
50.

What is the resistance if the current is 2A and the voltage is 10V?

The Formula is: Resitance = Voltage (Potential Difference)/Current

a)

8 Ω

b)

20 Ω

c)

12 Ω

d)

5 Ω

51.

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

a)

3 Amps

b)

4 Amps

c)

2 Amps

52.

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

a)
5V
b)
0.2V
c)
20V
d)
200V
53.

The formula for Speed is...

a)

Speed = distance/ time

b)

Speed = time/ distance

54.
How long did it take this object to travel 10 m?
a)
0 s
b)
10 s
c)
15 s
d)
20 s
55.
What is this graph showing?
a)
Constant Speed
b)
Acceleration (speeding up)
c)
Deceleration (slowing down)
d)
No motion
56.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
57.
a)
Object not moving
b)
Object accelerating
c)
Object slowing down
d)
Object at a constant speed
58.
What is happening at D?
a)
Stationary
b)
Accelerating
c)
Fast steady speed; moving away from the starting position
d)
Slower steady speed; moving away from the starting position
59.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking at a constant speed
b)
Running fast
c)
Not moving
d)
Walking slow
60.

Categorize the following with regards to the Forces...

Categorize the following

Parked Car

Water bottle on a table

Water bottle rolling down the hill

Car is starting to move

Balanced
Unbalanced
61.

Which lamps will light up? Select all the lamps that will light up.

A
B
C
62.

Which answer describes the pictures correctly?

a)

Both drawings show attraction of magnetic forces.

b)

The left drawing shows repulsion and the right drawing shows attraction of magnetic forces.

c)

Both drawings show repulsion of magnetic forces.

d)

The left drawing shows attraction and the right drawing shows repulsion of magnetic forces.

63.

How does the particle arrangement of water change when heated from 46 degrees Celsius to 102 degrees Celcius

a)

b)

c)

d)

64.

The diagram should represent a substance undergoing a change. Which particle arrangement completes the diagram if the substance is melting?

a)

b)

c)

d)

65.

The particle diagram represents phase change of a substance. Between which two phases does the substance change?

a)

solid to liquid

b)

liquid to gas

c)

solid to gas

d)

gas to solid

66.

The image shows three particle arrangements for water. How can the phases be classified?

a)

ice,

liquid water, water vapor

b)

liquid water, ice,

water vapor

c)

water vapor, ice, liquid water

d)

water vapor, liquid water, ice

67.

Match the following

a)

energy

1.

the abilit to do work or cause change

b)

kinetic energy

2.

the energy an object has due to its motion

c)

potential energy

3.

energy that results from an object's position or shape

d)

gravitational potential energy

4.

potential energy related to an object's height

e)

elastic potential energy

5.

energy associated with objects that can be compressed or stretched

68.

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

What type of energy transformation happens when you put gas in a car?

a)

Chemical-to mechanical energy

b)

Potential - kinetic

c)

Electrical - thermal

d)

nuclear - electrical

69.

Look at the image what energy transformation does a tree experience?

a)

Chemical energy to thermal energy

b)

Mechanical energy to Sound Energy

c)

Radiant energy to Chemical energy

d)

Electrical energy to chemical energy

70.

Mrs lightfood and her elephant walk across a wooden floor. Mrs Lightfoot heels leave a mark on the floor. The elephant's feet do not.

WHY ?

a)

The elephant weight is spread out, so it exert less pressure.

b)

The heels concentrate the pressure into a much smaller area.

c)

The elephant was on a diet and didn't weight much.

d)

The elephant was wearing boots.

71.

Match the following rock type with how it was created.

a)

Sedimentary rock

1.

Small pieces of rocks and organic matieral cemented and pressed together

b)

Igneous rock

2.

Magma/lava freezes

c)

Metamorphic rock

3.

The texture, shape, or chemical structure of a rock is changed by heat or pressure

d)

Magma/lava

4.

Any type of rock melts

e)

Sediment

5.

When erosion breaks off and carries away pieces of rock from parent material

72.

have properties of metals or nonmetals

a)

A

b)

B

c)

C

73.

nonmetals

a)

A

b)

B

c)

C

74.

metals

a)

A

b)

B

c)

C

75.

Rock Cycle Process

a)

Compaction & Cementation

b)

Crystallization

c)

Melting

d)

Heat & Pressure

e)

Weathering, erosion & deposition

1
2
3
4
5
1)
2)
3)
4)
5)
76.

How are igneous rocks formed?

a)

By the accumulation and compaction of sediments

b)

Through the cooling and solidification of magma or lava

c)

By the weathering of existing rocks

d)

Through the chemical precipitation of minerals

77.

How are sedimentary rocks formed?

a)

From the cooling of molten rock

b)

By the accumulation and compaction of sediments

c)

Through the melting of rocks

d)

By the alteration of existing rocks under heat and pressure

78.

What process can turn sedimentary rock into metamorphic rock?

a)

Erosion and deposition

b)

Melting and cooling

c)

Heat and pressure

d)

Weathering and compaction

79.

Which gas is absorbed by plants during photosynthesis?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

80.

What type of respiration occurs in the absence of oxygen?

a)

Aerobic respiration

b)

Anaerobic respiration

c)

Photosynthesis

d)

Fermentation

81.

Which of the following best describes an ecosystem?

a)

A single species interacting with its environment

b)

A community of organisms interacting with their environment

c)

A group of ecosystems interacting with each other

d)

A single organism in its habitat

82.

How do plants contribute to the oxygen cycle in ecosystems?

a)

They release oxygen during photosynthesis

b)

They absorb oxygen during respiration

c)

They release oxygen during fermentation

d)

They absorb oxygen during photosynthesis

83.

Put this food chain in the correct order

a)

Grass

b)

Rabbit

c)

Snake

d)

Hawk

1)
2)
3)
4)
84.

What is the correct order to describe how a species evolve ?

a)

Organism in a species show variation

b)

  1. The organisms with the characteristics that are best suited to the environment survive and reproduce. Others die.

c)

  1. Genes which code for advantageous characteristics are passed on to offspring.

d)

  1. More organisms within the species have the advantageous characteristics.

e)

Process is repeated over many generations.

1)
2)
3)
4)
5)
85.

Which two characteristics show variation as a result of environmental factors only?

a)

blood group

b)

pierced ears

c)

Scar

d)

natural eye colour

e)

height

86.

Which two characteristics show variation as a result of inherited factors only?

a)

blood group

b)

pierced ears

c)

number of freckles

d)

natural eye colour

e)

height

87.
Question Image

Identify a solute, the solvent, and the solution in a carbonated drink (like soda).​

a)

Carbon Dioxide (dissolved in the drink)

1.

Solute

b)

Water

2.

Solvent

c)

The Carbonated Drink

3.

Solution

88.

Is this solution saturated or unsaturated?

a)

saturated

b)

unsaturated

89.
How do organisms get the energy they need?
a)
Plants get energy from fertilizers and animals get energy from drinking water.
b)
Plants get energy from glucose produced in the soil, and animals get energy directly from sunlight.
c)
Plants break down the glucose they produced in photosynthesis, and animals get energy from eating other organisms.
d)
Plants do not require energy because they do not move, and animals get energy by performing exercise.
90.

Which of the following is not necessary for photosynthesis

a)

Chlorophyll

b)

Carbon dioxide gas

c)

Oxygen

d)

Water

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