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7th Grade Science Final

Total questions: 40

Worksheet time: 26mins

Name
Class
Date
1.

This change is a

a)

chemical reaction

b)

physical change

c)

musical change

d)

all answers are correct

2.

What is a chemical reaction?

a)

a change in matter when the molecules rearrange to make new molecules

b)

a change in matter when matter changes its form or appearance

c)

a change in matter when the physical appearance changes

d)

a very boring change in matter

3.

Which is the correct description of photosynthesis

a)

Photosynthesis is a chemical reaction because the atoms of the molecules get rearranged to form new molecules

b)

Photosynthesis is a chemical reaction because the molecules stay the same before and after the change

c)

Photosynthesis is a physical change because nature makes it happen

d)

Photosynthesis is a physical change because the atoms stay the same

4.

The law of conservation of mass says substances can neither be _______ nor ___________.

a)

Built; torn down

b)

Blended together; separated

c)

Created; destroyed

d)

Condensed; extracted

5.

Energy of motion

a)

Thermal

b)

Stored

c)

Kinetic

d)

Potential

6.

What are the three methods of heat transfer?

a)

conduction

b)

convection

c)

friction

d)

radiation

7.

Process of changing a liquid to a solid

a)

boiling

b)

freezing

c)

condensation

d)

melting

8.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
9.
Which stages does liquid water from the ocean turn into water vapor?
a)
condesantion
b)
evaporation
c)
precipitation
d)
run off
10.
what does the #4 show in the diagram?
a)
condensation
b)
evaporation
c)
precipitation
d)
run off
11.

When two air masses collide, a boundary forms between them called a ________________.

a)

weather front

b)

current

c)

pressure zone

d)

weather forecast

12.

In areas of _____________ air is sinking and dry leading to clear skies.

a)

low pressure

b)

high pressure

c)

warm front

d)

cold front

13.

Which type of air is more dense?

a)

warm air

b)

cold air

c)

tropical air

14.
Temperature and salinity differences in ocean water cause:
a)
Mid-ocean ridges
b)
Deep Currents
c)
Surface Currents
d)
High tide and low tide
15.
What process brings the deep cold ocean currents up to the surface?
a)
Conduction
b)
Global Wind Patterns
c)
Convection Currents
d)
Temperature and salinity
16.
What happens to a current when it comes in contact with a continent or landmass?
a)
It continues over the continent
b)
It stops
c)
It changes direction
d)
It is absorbed by the land
17.

Plant cells make their own food by taking in

a)

oxygen and water.

b)

oxygen and hydrogen.

c)

carbon dioxide and water.

d)

carbon dioxide and oxygen.

18.

What process describes how plants use air, water, and energy from the Sun to make their own food?

a)

condensation

b)

evaporation

c)

photosynthesis

d)

weathering

19.

The passing of traits from parent to child is known as _______________.

a)

heredity

b)

gene

c)

DNA

d)

RNA

20.

Which of the following is homozygous recessive?

a)

RR

b)

Rr

c)

rR

d)

rr

21.

Which genotypes are heterozygous?

a)

EE

b)

tt

c)

Rr

d)

Both EE and tt

22.

Which genotypes are homozygous dominant?

a)

EE

b)

tt

c)

Rr

d)

Both EE and tt

23.
When every organism of a species has died.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artificial Selection
24.

What word describes a trait that helps an organism survive in its environment?

a)

natural selection

b)

mutation

c)

camouflage

d)

adaptation

25.
Which organisms are most likely to survive?
a)
the best adapted
b)
the fastest
c)
the strongest
d)
the most domesticated (tamed)
26.

Natural Selection is driven by a change in the environment and survival of the

a)

Earth

b)

Fastest

c)

Fittest

d)

Biggest

27.
Breed an organism for a desired trait is the definition of
a)
selective breeding
b)
natural selection
c)
natural breeding
d)
biological evolution
28.

People depend on the oceans for __________________.

a)

Natural resources

b)

Food and water

c)

Transportation

d)

All of the above.

29.

Human activities are increasing the level of greenhouse gases in the atmosphere.

a)

True

b)

False

30.

What is an effect of global warming?

a)

melting glaciers and rising sea levels

b)

population is increasing

c)

more forest areas

d)

all of the above

31.

What is the purpose of the Circulatory System?

a)

Transports oxygen and nutrients

b)

Removes extra water and wastes

c)

Digests foods and absorbs nutrients

d)

Collects, transfers and processes information

32.

What is the purpose of the Skeletal System?

a)

Transports oxygen and nutrients

b)

Supports and protects the body, creates blood

c)

Movement and heat production

d)

Gas exchange in the body and lungs

33.

Which level of organization are you at?

a)

Tissue

b)

Organ

c)

Organ System

d)

Organism

34.

Which level of organization is a heart at?

a)

Cell

b)

Tissue

c)

Organ

d)

Organ System

35.

What term describes the variety of different organisms found in an ecosystem?

a)

population

b)

biodiversity

c)

ecosystem services

d)

symbiosis

36.

Below is an example of a simple food chain.


Acorn → Squirrel → Fox → Mountain Lion


What will most likely happen if squirrels are removed from the food chain?

a)

The fox will eat acorns

b)

The fox population will decrease

c)

The trees will produce fewer acorns.

d)

The mountain lion population will increase

37.

Why do the populations of invasive species grow so quickly?

a)

Invasive species are native to an area and thrive there.

b)

Invasive species are prey to many animals so they must keep large populations.

c)

Invasive species have no predators in their new ecosystems so they grow unchecked.

d)

Invasive species keep the ecosystems in equilibrium by having large numbers.

38.

Increasing concentration of toxins in an organism as a result of ingesting other plants or animals in which the toxins are widely distributed is called:

a)

biomagnification

b)

point-source pollution

c)

artificial eutrofication

d)

consumable pollution

39.

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

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

40.

Supplies blood with oxygen and rids the body of carbon dioxide

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

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