Quiz about 8th Grade Science STAAR Practice

Question 1

Organisms who receive their energy by consuming other organisms.

Accepted Answer

Heterotroph

Answer

Chloroplast

Answer

Autotroph

Answer

Phototropism

Question 2

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

Accepted Answer

Nucleus

Answer

Chloroplasts

Answer

Cell Wall

Answer

Homeostasis

Question 3

The genetic code for all of your traits.

Accepted Answer

DNA

Answer

Nucleus

Answer

Chloroplast

Answer

Recessive gene

Question 4

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

Accepted Answer

Chloroplast

Answer

Photosynthesis

Answer

Parasite

Answer

Cell Wall

Question 5

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

Accepted Answer

Cell Wall

Answer

Chloroplast

Answer

Turgor Pressure

Answer

Phototropism

Question 6

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

Accepted Answer

Eukaryote

Answer

Prokaryote

Answer

Autotroph

Answer

Homeostasis

Question 7

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

Accepted Answer

Turgor Pressure

Answer

Adaptation

Answer

Cell Wall

Answer

Photosynthesis

Question 8

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

Accepted Answer

Primary Succession

Answer

Secondary Succession

Answer

Natural Selection

Answer

Adaptation

Question 9

A cell without a nucleus.

Accepted Answer

Prokaryotic

Answer

Eukaryotic

Answer

Heterotroph

Question 10

Organisms who receive energy from dead or decaying matter.

Accepted Answer

Decomposers

Answer

Prokaryotic

Answer

Omnivore

Answer

Heterotrophic

Question 11

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

Accepted Answer

Secondary Succession

Answer

Primary Succession

Answer

Natural Selection

Answer

Adaptations

Question 12

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

Accepted Answer

Dominant

Answer

Recessive

Answer

Natural Selection

Answer

Homeostasis

Question 13

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

Accepted Answer

Adaptations

Answer

Homeostasis

Answer

Recessive traits

Answer

Natural Selection

Question 14

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

Accepted Answer

Recessive

Answer

Dominant

Answer

Eukaryotic

Answer

Homeostasis

Question 15

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

Accepted Answer

Autotroph

Answer

Heterotroph

Answer

Phototropism

Answer

Heterotroph

Question 16

Successful traits are passed onto offspring through natural circumstances.

Accepted Answer

Natural Selection

Answer

Primary Succession

Answer

Secondary Succession

Answer

Dominant

Question 17

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

Accepted Answer

Phototropism

Answer

Parasitic

Answer

Chloroplast

Answer

Photosynthesis

Question 18

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

Accepted Answer

Parasite

Answer

Decomposer

Answer

Heterotroph

Answer

Carnivore

Question 19

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

Accepted Answer

Homeostasis

Answer

Heterotroph

Answer

Prokaryotic

Answer

Autotrophic

Question 20

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

Accepted Answer

Photosynthesis

Answer

Phototropism

Answer

Chloroplast

Answer

Prokaryotic

Question 21

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?

Accepted Answer

The amount of force required is doubled.

Answer

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

Answer

The amount of force required is slightly increased.

Answer

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

Question 22

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?

Accepted Answer

More force at liftoff equals more acceleration

Answer

More mass equals more acceleration

Answer

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

Answer

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

Question 23

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

Accepted Answer

at the bottom of the first drop

Answer

at the top of the second hill

Answer

when the train first leaves the loading station

Answer

at the top of the first drop

Question 24

What energy transformations are occurring in this scenario?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 25

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

Accepted Answer

Potential Energy

Answer

Mechanical Force

Answer

Unbalanced Energy

Answer

Unbalanced Force

Question 26

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

Accepted Answer

Unbalanced

Answer

Balanced

Answer

Magnetic

Answer

Spring

Question 27

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

Accepted Answer

balanced force

Answer

negative acceleration

Answer

unbalanced force

Answer

1st law of motion

Question 28

Which is newtons 3rd law

Accepted Answer

For every reaction there is an equal and opposite reaction

Answer

for every thing there is reaction

Answer

for every reaction there is a unusual action

Answer

for every reaction there is an good action

Question 29

Which is newtons 2nd law

Accepted Answer

Acceleration is a change in velocity

Answer

Acceleration is a change in speed

Answer

Acceleration is a change in action

Answer

Acceleration is a change in name

Question 30

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

Accepted Answer

unbalanced force

Answer

gravity

Answer

balanced forces

Answer

net force

Question 31

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

Accepted Answer

equal and opposite

Answer

equal and same

Answer

equal and equal to

Question 32

What are the appropriate units to describe acceleration?

Accepted Answer

m/s square

Answer

m/p

Answer

m/h

Answer

m/s

Question 33

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

Accepted Answer

Inertia

Answer

Friction

Answer

Gravity

Answer

Velocity

Question 34

Question 34.

Accepted Answer

6N

Answer

4N

Answer

10 N

Answer

14 N

Question 35

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

Accepted Answer

section D

Answer

section A

Answer

section B

Answer

section C

Question 36

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

Accepted Answer

conducts heat and electricity, shiny, and solid

Answer

mostly gases and are very reactive

Answer

share properties of metals and nonmetals

Answer

liquids that are stable in pure form

Question 37

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

Accepted Answer

group

Answer

period

Answer

area

Answer

section

Question 38

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

Accepted Answer

spread out

Answer

close together

Answer

going down

Answer

going up

Question 39

The height above sea level is called

Accepted Answer

elevation

Answer

topographic

Answer

contour

Answer

depth

Question 40

An example of erosion is

Accepted Answer

pieces of rock are blown away by the wind

Answer

rock is broken into little bits

Answer

pieces of rock carried by water settle in a new location

Answer

a delta

Question 41

In which direction is Mill River flowing?

Accepted Answer

Northeast

Answer

Southeast

Answer

Southwest

Answer

Northwest

Question 42

What is the highest elevation on this map?

Accepted Answer

Over 380 meters

Answer

Over 320 meters

Answer

Over 450 meters

Answer

Over 220 meters

Question 43

Which phases happen immediately before and after the phase shown

Accepted Answer

Waxing Crescent and Waxing Gibbous

Answer

Full moon and New moon

Answer

Waxing Crescent and Full Moon

Answer

Waxing Gibbous and Full Moon

Question 44

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

Accepted Answer

Position 4

Answer

Position 1

Answer

Position 2

Answer

Position 3

Question 45

What moon phase comes next?

Accepted Answer

New Moon

Answer

First Quarter

Answer

Full Moon

Answer

Third Quarter

Question 46

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

Accepted Answer

Stars get hotter

Answer

Stars Get Larger

Answer

Stars get Colder

Question 47

Which of these stars is hottest?

Accepted Answer

Blue Star

Answer

Red Star

Answer

Yellow Star

Answer

Orange Star

Question 48

Which category is our Sun located in?

Accepted Answer

Main Sequence

Answer

White Dwarfs

Answer

Supergiants

Answer

Giants

Question 49

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

Accepted Answer

Barnard's star

Answer

Betelguse

Answer

Sirius B

Answer

Procyon B

Question 50

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?

Accepted Answer

The number of grasshoppers, lizards, and hawks will decrease

Answer

The number of grasshoppers will increase

Answer

The number of lizards will increase

Answer

The number of lizards and hawks will decrease

Question 51

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

Accepted Answer

die

Answer

produce more offspring

Answer

change its traits to survive

Answer

store more food

Question 52

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

Accepted Answer

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

Answer

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

Answer

Catches most prey at midday
Eats fruit
Tree dweller
Grasping talons

Answer

Eats Fruit
Tree dweller
Catches most prey at midday
Grasping talons

Question 53

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 _

Accepted Answer

competing with one another for food

Answer

establishing a strict territory from one another

Answer

creating a symbiotic relationship with one another

Answer

caring for their young by supplying food

Question 54

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

Accepted Answer

New Moon

Answer

Full Moon

Question 55

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

Accepted Answer

Full Moon

Answer

New Moon

Question 56

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

Accepted Answer

gasoline burns in a car engine

Answer

water freezes to form ice

Answer

sugar dissolves in water

Answer

a piece of metal expands when it is heated

Question 57

Which one shows that a chemical reaction has occurred?

Accepted Answer

formation of a gas

Answer

dissolving

Answer

melting

Answer

bending

Question 58

What part of digestion is a physical change?

Accepted Answer

Mastication - Chewing the food

Answer

Enzymes breaking it down

Question 59

Question 59.

Accepted Answer

3

Answer

2

Answer

8

Answer

13

Question 60

USE THE PERIODIC TABLE

How many valence electrons does sodium have?

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 61

How many protons are in Cadmium?

Accepted Answer

48

Answer

112.411

Answer

170

Answer

64

Question 62

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

Accepted Answer

22

Answer

39.948

Answer

58

Answer

18

Question 63

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

Accepted Answer

atomic mass

Answer

atomic number

Answer

net charge

Answer

chemical symbol

Question 64

Which element has 6 protons?

Accepted Answer

C

Answer

N

Answer

O

Answer

B

8th Grade Science STAAR Practice

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