Free Printable 8th Grade Science STAAR Practice

1.

Organisms who receive their energy by consuming other organisms.

a)

Chloroplast

b)

Heterotroph

c)

Autotroph

d)

Phototropism

2.

The part of a cell that contains the chromosomes (wound up DNA) in eukaryotic cells.

a)

Chloroplasts

b)

Cell Wall

c)

Nucleus

d)

Homeostasis

3.

The genetic code for all of your traits.

a)

Nucleus

b)

DNA

c)

Chloroplast

d)

Recessive gene

4.

The organelle inside a plant cell that converts sunlight into energy.

a)

Chloroplast

b)

Photosynthesis

c)

Parasite

d)

Cell Wall

5.

The part of a plant cell that is rigid & permeable.

a)

Chloroplast

b)

Turgor Pressure

c)

Cell Wall

d)

Phototropism

6.

The term used to define a cell that has a nucleus containing DNA.

a)

Prokaryote

b)

Eukaryote

c)

Autotroph

d)

Homeostasis

7.

A force exerted outward on a cell wall by the water contained on a cell.

a)

Turgor Pressure

b)

Adaptation

c)

Cell Wall

d)

Photosynthesis

8.

The building up of an ecosystem after lava or glaciers have left nothing but rock.

a)

Secondary Succession

b)

Primary Succession

c)

Natural Selection

d)

Adaptation

9.

A cell without a nucleus.

a)

Eukaryotic

b)

Prokaryotic

c)

Heterotroph

10.

Organisms who receive energy from dead or decaying matter.

a)

Prokaryotic

b)

Omnivore

c)

Heterotrophic

d)

Decomposers

11.

Rebuilding an ecosystem after a catastrophic event has occurred and soil is present.

a)

Primary Succession

b)

Secondary Succession

c)

Natural Selection

d)

Adaptations

12.

The trait that is always expressed. It will hide or mask the other trait.

a)

Recessive

b)

Dominant

c)

Natural Selection

d)

Homeostasis

13.

Behavior patterns, or internal and external structures which allow an organism to survive and reproduce in their environment successfully.

a)

Adaptations

b)

Homeostasis

c)

Recessive traits

d)

Natural Selection

14.

The trait that is hidden or masked by the other trait.

a)

Dominant

b)

Eukaryotic

c)

Recessive

d)

Homeostasis

15.

Organisms who make their own energy by taking in light or chemicals.

a)

Heterotroph

b)

Phototropism

c)

Autotroph

d)

Heterotroph

16.

Successful traits are passed onto offspring through natural circumstances.

a)

Natural Selection

b)

Primary Succession

c)

Secondary Succession

d)

Dominant

17.

The response of a plant due to the stimuli of light energy.

a)

Parasitic

b)

Chloroplast

c)

Photosynthesis

d)

Phototropism

18.

This type of organism feeds on a host organism, causing harm to the host.

a)

Decomposer

b)

Parasite

c)

Heterotroph

d)

Carnivore

19.

The organism's ability to maintain equilibrium in their body.

a)

Homeostasis

b)

Heterotroph

c)

Prokaryotic

d)

Autotrophic

20.

The process where plants use the light from the sun to convert carbon dioxide and water into glucose.

a)

Phototropism

b)

Chloroplast

c)

Photosynthesis

d)

Prokaryotic

21.

In the case of a car crash, the body’s inertia will continue to carry it to the right. However, if the person is wearing a seatbelt, in which direction will this force act?

a)

to the right

b)

to the left

c)

upward

d)

downward

22.

Suppose you pull Nick, who is standing on a skateboard, using a rope at a constant acceleration. What happens when you double the mass and add a friend?

a)

There will be no change to the required amount of force.

b)

The amount of force required is slightly increased.

c)

The amount of force required is doubled.

d)

The amount of force required is four-times as great.

23.

Once in orbit, the space shuttle used very little, if any, rocket power to maintain its speed despite traveling over 15,000 mph! How were NASA engineers able to do this?

a)

More mass equals more acceleration

b)

The space shuttle was able to use a special coating in order to achieve its fast speed in space.

c)

Gravity provides the necessary force to keep the space shuttle traveling at a high rate of speed.

d)

More force at liftoff equals more acceleration

24.

At what point on a roller coaster does the train have the highest kinetic energy?

a)

at the bottom of the first drop

b)

at the top of the second hill

c)

when the train first leaves the loading station

d)

at the top of the first drop

25.

Samuel kicks a soccer ball across a grassy field and it eventually comes to a stop. If Newton’s law of inertia is true, why did the ball stop?

a)

Newton’s law only applies to objects at rest.

b)

The mass of the ball is not great enough to have inertia.

c)

Friction with the grass applies a net force on the ball causing it to decrease its speed.

d)

Gravity slowed the ball until it came to a stop.

26.

What energy transformations are occurring in this scenario?

a)

electrical energy --> mechanical energy --> light energy

b)

solar energy --> electrical energy --> light energy

c)

solar energy --> mechanical energy --> light energy

d)

solar energy --> electrical energy --> mechanical energy

27.

A ball at the top of a hill has ________ ________ because if pushed it will roll down the hill.

a)

Mechanical Force

b)

Unbalanced Energy

c)

Potential Energy

d)

Unbalanced Force

28.

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

a)

Balanced

b)

Magnetic

c)

Spring

d)

Unbalanced

29.

Standing in line is an example of a ________ ________ since you are not moving forward, backward, or sideways.

a)

negative acceleration

b)

balanced force

c)

unbalanced force

d)

1st law of motion

30.

Which is newtons 3rd law

a)

for every thing there is reaction

b)

for every reaction there is a unusual action

c)

For every reaction there is an equal and opposite reaction

d)

for every reaction there is an good action

31.

Which is newtons 2nd law

a)

Acceleration is a change in speed

b)

Acceleration is a change in action

c)

Acceleration is a change in name

d)

Acceleration is a change in velocity

32.

Which type of force(s) will cause a change in an object's motion?

a)

gravity

b)

balanced forces

c)

unbalanced force

d)

net force

33.

Newton's third law states that any action will have a(n) _______ and ______ reaction

a)

equal and same

b)

equal and opposite

c)

equal and equal to

34.

What are the appropriate units to describe acceleration?

a)

m/p

b)

m/h

c)

m/s

d)

m/s square

35.

The tendency of objects to resist a change in motion is called:

a)

Friction

b)

Inertia

c)

Gravity

d)

Velocity

36.

a)

4N

b)

6N

c)

10 N

d)

14 N

37.

All living things require oxygen to survive. Where on the periodic table above would you find gases like oxygen?

a)

section A

b)

section B

c)

section C

d)

section D

38.

Henry is investigating the properties of elements in section A. What are the general characteristics of elements from section A?

a)

conducts heat and electricity, shiny, and solid

b)

mostly gases and are very reactive

c)

share properties of metals and nonmetals

d)

liquids that are stable in pure form

39.

CH₄ +2O₂→ CO₂ +2H₂O
How many different elements are involved in this reaction?

a)

two

b)

three

c)

four

d)

five

40.

When comparing two elements on the periodic table, elements in the same ___________ are most likely to have similar chemical and physical properties.

a)

group

b)

period

c)

area

d)

section

41.

On a topographic map of a mountain, you walk a longer distance to get to the top when the contour lines are

a)

spread out

b)

close together

c)

going down

d)

going up

42.

The height above sea level is called

a)

topographic

b)

contour

c)

elevation

d)

depth

43.

An example of erosion is

a)

rock is broken into little bits

b)

pieces of rock carried by water settle in a new location

c)

a delta

d)

pieces of rock are blown away by the wind

44.

In which direction is Mill River flowing?

a)

Southeast

b)

Southwest

c)

Northeast

d)

Northwest

45.

What is the highest elevation on this map?

a)

Over 320 meters

b)

Over 450 meters

c)

Over 220 meters

d)

Over 380 meters

46.

Which phases happen immediately before and after the phase shown

a)

Full moon and New moon

b)

Waxing Crescent and Waxing Gibbous

c)

Waxing Crescent and Full Moon

d)

Waxing Gibbous and Full Moon

47.

If the new moon must always be between the sun and Earth where should a student put the "sun"

a)

Position 1

b)

Position 2

c)

Position 3

d)

Position 4

48.

What moon phase comes next?

a)

New Moon

b)

First Quarter

c)

Full Moon

d)

Third Quarter

49.

In the diagram given, what happens as we move to the left?

a)

Stars Get Larger

b)

Stars get Colder

c)

Stars get hotter

50.

Which of these stars is hottest?

a)

Red Star

b)

Yellow Star

c)

Orange Star

d)

Blue Star

51.

Which category is our Sun located in?

a)

White Dwarfs

b)

Supergiants

c)

Main Sequence

d)

Giants

52.

Look at the H-R diagram. Which star is
sort of cool, dim (not too much light), and red?

a)

Betelguse

b)

Sirius B

c)

Procyon B

d)

Barnard's star

53.

Insecticides are sprayed over a large area in an effort to reduce the number of grasshoppers that are eating the corn plants. How will this change affect this food chain?

a)

The number of grasshoppers will increase

b)

The number of lizards will increase

c)

The number of lizards and hawks will decrease

d)

The number of grasshoppers, lizards, and hawks will decrease

54.

An organism that cannot adapt to changes in the environment will most likely -

a)

produce more offspring

b)

die

c)

change its traits to survive

d)

store more food

55.

Identify the characteristics that can be inferred about this animals niche as a nocturnal predator.

a)

Hunts live prey at night
Tree dweller
Excellent night vision
Grasping talons

b)

Hunts live prey at night
Eats Fruit
Tree dweller
Scavenges from dead carcases

c)

Catches most prey at midday
Eats fruit
Tree dweller
Grasping talons

d)

Eats Fruit
Tree dweller
Catches most prey at midday
Grasping talons

56.

This figure shows three warblers with different niches in a spruce tree habitat. The warblers are feeding in different areas of the tree which allows them to avoid _

a)

competing with one another for food

b)

establishing a strict territory from one another

c)

creating a symbiotic relationship with one another

d)

caring for their young by supplying food

57.

What is the name of the moon phase in the diagram?

a)

New Moon

b)

Full Moon

58.

What is the name of the moon phase in the diagram?

a)

New Moon

b)

Full Moon

59.

Which of the following is an example of a chemical change?

a)

water freezes to form ice

b)

sugar dissolves in water

c)

gasoline burns in a car engine

d)

a piece of metal expands when it is heated

60.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

61.

What part of digestion is a physical change?

a)

Mastication - Chewing the food

b)

Enzymes breaking it down

62.

a)

2

b)

8

c)

3

d)

13

63.

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

a)

1

b)

2

c)

3

d)

4

64.

How many protons are in Cadmium?

a)

112.411

b)

170

c)

64

d)

48

65.

How many neutrons does Argon have in it's nucleus?

a)

39.948

b)

58

c)

22

d)

18

66.

The ______________ is the number of protons + neutrons in the nucleus of an atom.

a)

atomic number

b)

net charge

c)

chemical symbol

d)

atomic mass

67.

Which element has 6 protons?

a)

N

b)

C

c)

O

d)

B

68.

Changing the number of protons in an atom will change the atom's _____

a)

color

b)

atomic weight/mass

c)

net charge

d)

identity (name of element)

69.

Calculate the atomic weight/mass of an atom with:
11 protons
10 neutrons
11 electrons

a)

11

b)

21

c)

22

d)

10

70.

a)

A

b)

B

c)

C

d)

D

71.

a)

F

b)

G

c)

H

d)

J

72.

a)

A

b)

B

c)

C

d)

D

73.

a)

F

b)

G

c)

H

d)

J

74.

a)

A

b)

B

c)

C

d)

D

75.

a)

F

b)

G

c)

H

d)

J

76.

a)

A

b)

B

c)

C

d)

D

77.

a)

F

b)

G

c)

H

d)

J

78.

(a)

79.

a)

A

b)

B

c)

C

d)

D

80.

a)

F

b)

G

c)

H

d)

J

81.

a)

A

b)

B

c)

C

d)

D

82.

a)

F

b)

G

c)

H

d)

J

83.

a)

A

b)

B

c)

C

d)

D

84.

a)

A

b)

B

c)

C

d)

D

85.

a)

F

b)

G

c)

H

d)

J

86.

a)

A

b)

B

c)

C

d)

D

87.

a)

F

b)

G

c)

H

d)

J

88.

a)

F

b)

G

c)

H

d)

J

89.

a)

A

b)

B

c)

C

d)

D

90.

a)

F

b)

G

c)

H

d)

J

91.

a)

A

b)

B

c)

C

d)

D

92.

a)

F

b)

G

c)

H

d)

J

93.

a)

A

b)

B

c)

C

d)

D

94.

a)

A

b)

B

c)

C

d)

D

95.

(a)

96.

a)

F

b)

G

c)

H

d)

J

97.

a)

A

b)

B

c)

C

d)

D

98.

a)

F

b)

G

c)

H

d)

J

99.

a)

A

b)

B

c)

C

d)

D

100.

a)

F

b)

G

c)

H

d)

J

101.

a)

A

b)

B

c)

C

d)

D

102.

a)

F

b)

G

c)

H

d)

J

103.

a)

A

b)

B

c)

C

d)

D

104.

a)

F

b)

G

c)

H

d)

J

105.

a)

A

b)

B

c)

C

d)

D

8th Grade Science STAAR Practice

Total questions: 105

Worksheet time: 2hrs 51mins

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