MCAS Review Grade 8 Science

Question 1

Which graph shows the relationship between the temperature of a gas and speed of its molecules?

Accepted Answer

A

Question 2

A student wants to measure the box more precisely. She needs...

Accepted Answer

a ruler that is marked in millimeters

Question 3

Which is an example of asexual reproduction?

Accepted Answer

trees send out rootlike extensions that produce new stems

Question 4

The force of gravity causes:

Accepted Answer

All of the above

Question 5

Asus is designing a new laptop that can't exceed a certain weight. Why would it have a limit?

Accepted Answer

to make it easier to transport the computer

Question 6

How do particles move if the temperature of nitrous oxide is lowered to -91 C?

Accepted Answer

the speed of the particles decreases

Question 7

In the ecosystem cycle pictured, the arrows most likely represent what?

Accepted Answer

nutrients

Question 8

Which physical property would help you determine if a liquid is H2O?

Accepted Answer

boiling point

Question 9

Which of the following has a warmer average surface temperature than Earth?

Accepted Answer

Venus

Question 10

Seafloor spreading provides evidence of which of the following Earth processes?

Accepted Answer

movement of crustal plates

Question 11

Which car had an average speed of 4 m/s?

Accepted Answer

B

Question 12

How is a skin cell from a mouse similar to an amoeba?

Accepted Answer

both need energy

Question 13

Which principle explains how a thermometer works?

Accepted Answer

A liquid expands when heated and contracts when cooled.

Question 14

How are the climates of City Y and City Z different? (Same elevation and latitude.)

Accepted Answer

City Y has cooler summers than city Z.

Question 15

Which part of the cell is labeled "A" in both diagrams?

Accepted Answer

Cytoplasm

Question 16

Based on the table, which is likely an animal cell?

Accepted Answer

Cell 4

Question 17

What force is responsible for the motion of these objects?

Accepted Answer

Gravity

Question 18

The graph shows tidal changes at a beach over 50 hours. How many hours between two high tides?

Accepted Answer

13 hours

Question 19

If a solid object is taken from Earth into space, which measurement will change most?

Accepted Answer

weight

Question 20

Why does Mercury have a shorter year than Earth?

Accepted Answer

Mercury is closer to the sun.

Question 21

If thermal energy is removed from a liquid...

Accepted Answer

The temperature of the liquid decreases.

Question 22

The bat wing and whale flipper have similar bone structures because...

Accepted Answer

They evolved from a common ancestor.

Question 23

Which is most likely marked by the "X" in the map?

Accepted Answer

Cliff

Question 24

Which motion of continents would create mountain ranges?

Accepted Answer

D

Question 25

All the liquid from a test tube is poured into a beaker. Which is true in the beaker?

Accepted Answer

Liquid has a different shape, but same volume.

Question 26

Based on the illustration of a bacterium, what can be concluded about the bacterium?

Accepted Answer

It is made up of one cell

Question 27

As a result of the changes in forces from Time 1 to Time 2, the bicyclist will:

Accepted Answer

Move faster forward

Question 28

Most of the bacteria in a forest ecosystem would be best classified as what type of organism?

Accepted Answer

decomposer

Question 29

Black = carbon, White = Hydrogen. What is the formula of this compound?

Accepted Answer

C3H8

Question 30

Which of the following is the same for both compounds?

Accepted Answer

the types of atoms in each molecule

Question 31

Which of the materials are direct products of photosynthesis?

Accepted Answer

oxygen and sugar

Question 32

Which moon phase would be seen when the moon is at position D?

Accepted Answer

Quarter moon

Question 33

Which of the following best describes the role of the perch in this energy pyramid?

Accepted Answer

Secondary consumer

Question 34

Which is an example of a jar that is filled with a pure substance rather than with a mixture

Accepted Answer

a balloon filled with helium

Question 35

Which statement best describes the population of insects over 50 years?

Accepted Answer

It followed a cyclic pattern

Question 36

How has the use of interchangeable parts affected car manufacturing?

Accepted Answer

Manufacturing efficiency has increased.

Question 37

Which conclusion is best supported by the graphs?

Accepted Answer

Antibiotic C was most effective at controlling growth.

Question 38

Which image best represents a mixture?

Accepted Answer

A

Question 39

What season does the Southern Hemisphere experience when Earth & sun are in these positions?

Accepted Answer

winter

Question 40

Which of the activities is performed by the marketing department of a manufacturing company

Accepted Answer

advertising

Question 41

Which of the processes caused the breakup and relocation of landmasses shown?

Accepted Answer

tectonic plate motion

Question 42

Which statement best describes the role of gravity in the formation of stars?

Accepted Answer

gravity causes gas & dust particles to condense into spheres

Question 43

What process is responsible for the transfer of heat from the flame to the water?

Accepted Answer

Convection

Question 44

Which process results in the formation of water on the outside of a glass of ice water?

Accepted Answer

Condensation

Question 45

A natural process is represented in the picture. What process is this?

Accepted Answer

photosynthesis

Question 46

Sand oxidizes and forms yellow, red, and orange rock. This represents:

Accepted Answer

Chemical weathering

Question 47

Which type of heat transfer is represented by each diagram?

Accepted Answer

X = Convection, Y = Conduction, Z = Radiation

Question 48

Which cube has the greatest density?

Accepted Answer

1

Question 49

Which moon position would create a full moon on Earth?

Accepted Answer

D

Question 50

What is the most important function of the research & development dept of a large corporation?

Accepted Answer

To create, test and improve products

Question 51

As the amount of light received by a plant increases, its rate of photosynthesis...

Accepted Answer

Increases, then remains the same

Question 52

Warm air masses that rise over equator move North or South because of which process?

Accepted Answer

convection

Question 53

Which of the statements best describes the mass of a solid block of ice?

Accepted Answer

the amount of matter in the block

Question 54

At which location does the ball have the greatest amount of kinetic energy?

Accepted Answer

Position 1

Question 55

In cats, Long hair = h, Short hair = H. How do the kittens look?

Accepted Answer

A mix of long and short-haired

MCAS Review Grade 8 Science

Questions 55

MCAS Review Grade 8 Science

Questions 55