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STAAR Science 8th Grade Review

Total questions: 52

Worksheet time: 4hrs 46mins

Name
Class
Date
1.
A clear liquid from a flask is poured into another clear liquid in a beaker. Which of the following results of this procedure would indicate a new substance was formed?
a)
The level of the substance in the beaker is higher after the other liquid is added.
b)
A yellow solid forms and then settles to the bottom of the beaker.
c)
Small white crystals are left behind in the flask that held the first liquid.
2.

Which liquid is the least dense?

a)

Oil

b)

Water

c)

Syrup

d)

Plastic bottle

3.

If the amount of food or resources available increases, the carrying capacity for an animal.....

a)

Stays the same

b)

Increases

c)

Decreases

d)

Fluctuates

4.
a)
4N 
b)
6N 
c)
10 N 
d)
14 N 
5.
a)
The cart was stationary with a velocity of 0 m/s for the entire 7 seconds. 
b)
The cart was stationary except for a short burst of acceleration of 0.5 m/s^2 . 
c)
The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.
d)
The cart accelerated at a constant rate of approximately 0.8 m/s^2 . 
6.
a)
The book, the ball, and the car 
b)
The ball, the car, and the bird 
c)
The can, the swing, and the bird 
d)
The book, the ball, the can, and the swing 
7.
a)
As the fuel burns, gases push against the rocket, moving it upward. 
b)
As the fuel burns, gases move out of the rocket and reduce air resistance. 
c)
As the fuel burns, the mass of the rocket decreases. 
d)
As the fuel burns, the rocket moves faster. 
8.
a)
The toy train speeds up while going forward and then slows down. 
b)
The toy train slows down while going forward and then moves backward. 
c)
The toy train moves forward at a constant speed, slows down, and then stops. 
d)
The toy train moves forward at an increasing speed, stops, and then moves forward. 
9.
A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred? 
a)
The chemical energy stored in the match changed to thermal energy and light energy. 
b)
The thermal energy stored in the match changed to light energy and chemical energy. 
c)
The light energy and thermal energy stored in the match changed to mechanical energy. 
d)
The light energy and thermal energy stored in the match changed to chemical energy. 
10.
a)
The Pacific and Nazca plates are both moving to the east. 
b)
The Pacific and Nazca plates are both moving to the west. 
c)
The Pacific plate is moving to the west, and the Nazca plate is moving to the east. 
d)
The Pacific plate is moving to the east, and the Nazca plate is moving to the west. 
11.
a)
Less sediment flowed into the river because the fire heated up the soil and made it drier. 
b)
The amount of vegetation increased and less sediment flowed into the river because the fire produced ash that mixed with the soil. 
c)
More sediment flowed into the river because the fire destroyed most of the vegetation holding the sediment in place. 
d)
More sediment flowed into the river because the fire disrupted animal habitats and caused animals to leave the area. 
12.
a)
The functions of living things occur in cells. 
b)
Cells exist only in multicellular organisms. 
c)
Living things are composed of cells. 
d)
Cells contain hereditary information. 
13.
a)
a main-sequence star in spectral class B 
b)
a supergiant in spectral class K
c)
a main-sequence star in spectral class K or M 
d)
a white dwarf in spectral class B 
14.
The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest? 
a)
Planets, stars, galaxies, nebulae 
b)
Nebulae, stars, planets, galaxies 
c)
Galaxies, stars, planets, nebulae
d)
Planets, stars, nebulae, galaxies
15.
With the use of the Hubble Space Telescope, scientists recently discovered a giant runaway star. It is 90 times larger than the sun and is very hot and blue-white in color. Why does the sun appear to be brighter than this runaway star when viewed from Earth? 
a)
The sun is a different color than the runaway star.
b)
The sun is older than the runaway star. 
c)
The sun is closer to Earth than the runaway star. 
d)
The sun is made of different elements than the runaway star. 
16.
In July 1994 the comet Shoemaker-Levy 9 collided with the planet Jupiter, as scientists had predicted. To be able to accurately predict when a comet will collide with a planet, it is essential to understand — 
a)
the composition of a planet’s atmosphere 
b)
the gravitational attraction that exists between all bodies 
c)
the attraction of opposite poles of a magnet to each other
d)
the formation of comets 
17.
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 
18.
Some elements have properties of metals and nonmetals, which make them useful in electronic devices. Where can these elements be found? 
a)
section A 
b)
section B
c)
section C
d)
section D 
19.
Transition metals are malleable and are found in section B. What is another property of metals in section B? 
a)
conducts heat
b)
liquid state of matter
c)
highly reactive and never found as a pure element 
d)
poor conductors of electricity 
20.
CH4 +2O2  →  CO2 +2H2O 
 How many different elements are involved in this reaction? 
a)
two 
b)
three 
c)
four
d)
five
21.
CH4 +2O2  →  CO2 +2H2O
How many atoms of hydrogen are involved in this reaction? Record you answer below. 
a)
6
b)
10
c)
4
d)
2
22.

Photosynthesis & Respiration

What materials do plants need for photosynthesis to occur?

a)

Water & Soil only

b)

Water and sunlight

c)

Water, sunlight, and Carbon Dioxide

d)

Water, sunlight, and Oxygen

23.

Which of the following would be examples pioneer species?

a)

Lichen & Moss

b)

Large Trees

c)

Flowers and Grasses

d)

Shrubs & small trees

24.

Which of the following would be examples of a Climax Community species?

a)

Lichen & Moss

b)

Large Trees

c)

Flowers and Grasses

d)

Shrubs & small trees

25.

In this food web the Ant would classifiy as which of the following?

a)

Herbivore

b)

Carnivore

c)

Omnivore

d)

Producer

26.

Body Systems Functions

Match the body system with it's description: Transports nutrients and minerals throughout the body through a network of blood vessels

a)

Circulatory System

b)

Skeletal System

c)

Endocrine System

d)

Respiratory System

27.

Body Systems Functions

Match the body system with it's description: Intakes oxygen and transports it to the bloodstream AND expels gaseous wastes like CO2,

a)

Circulatory System

b)

Skeletal System

c)

Endocrine System

d)

Respiratory System

28.

Two balls of different mass collide and move apart from each other. What happens as a result of the collision?

a)

The smaller mass moves with greater acceleration away from the larger mass

b)

The larger mass moves with greater acceleration away from the smaller mass

c)

Both masses move away from each other with equal acceleration.

d)

Both masses continue to move toward each other.

29.

How many protons does Carbon have?

a)

18

b)

24

c)

12

d)

6

30.

How many protons do Nitrogen and Oxygen have combined?

a)

15

b)

30

c)

1

d)

45

31.

Which side is steeper?

a)

The left side of the hill

b)

The right side of the hill

32.
Provided is a topographic map of a hill with contour lines drawn showing elevation in meters.
The steepest slope on this hill can be found on the side that is facing which direction?
a)
Southwest
b)
Northeast
c)
Northwest
d)
Southeast
33.
Which season is taking place in the Northern Hemisphere in Position 3?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
34.

In the summer, many people enjoy going to the beach. The photograph shows a beach in Argentina, which is located in the Southern Hemisphere. Which diagram shows the position of Earth when it is summer in Argentina?

a)
b)
c)
d)
35.
What are the reasons for the season?
a)
Earth's tilt & rotation
b)
Earth's tilt & revolution
c)
Earth's rotation & rovolution
d)
Earth's tilt & resolution
36.
At position A, which hemisphere would have summer?
a)
Northern hemisphere
b)
Southern hemisphere
37.

At which position would the people on Earth see a full moon?

a)

1

b)

3

c)

5

d)

7

38.
What is the name of this moon phase?
a)
Waning Crescent
b)
Waxing Crescent
c)
Waning Gibbous
d)
Waxing Gibbous
39.

What phase of the moon is shown in the picture?

a)

first quarter

b)

new moon

c)

full moon

d)

last quarter

40.
Based on this diagram which type of stars would belong to spectral class M and have the lowest luminosity?
a)
Main Sequence Stars
b)
Giants
c)
Super Giants
d)
White Dwarfs
41.
On the H-R diagram, the Sun is a _____.
a)
Main Sequence star
b)
Red Giant
c)
White Dwarf
d)
Blue Giant
42.
Red stars are the _____________.
a)
hottest
b)
coolest
c)
biggest
d)
brightest
43.
Blue stars are the _____________.
a)
hottest
b)
coolest
c)
smallest
44.

How many different elements are present in H2COCH2

a)

5

b)

4

c)

3

d)

2

45.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

46.
Convergent Plate Movement can create
a)
Rifts
b)
Mountains
c)
Ocean Ridges
d)
Radiation
47.
Divergent Plate movement can create
a)
Convection Currents
b)
Conduction
c)
Mountains
d)
Rifts and ocean ridges
48.
a)
F
b)
G
c)
H
d)
J
49.
a)
A
b)
B
c)
C
d)
D
50.
Which of these best describes what is happening at Location 6?
F Oceanic plate is being created.
G Continent is being destroyed.
H Island is forming.
J Oceanic crust is being destroyed.
a)
F
b)
G
c)
H
d)
J
51.
What land feature is likely to occur between the South American Plate and the African Plate?
F Mountain
G Trench
H Subduction zone
J Mid-ocean ridge
a)
F
b)
G
c)
H
d)
J
52.

Rift valleys are formed by _______________.

a)

divergent boundary that moves past each other

b)

convergent boundary that crash against each other

c)

transform boundary that moves away from each other

d)

divergent boundary that moves apart from each other

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