Quiz about CAST Science 8 Practice Test 2

Question 1

Which model correctly shows that the mass is conserved in the reaction?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 2

In this equation, the reactants are on the

Accepted Answer

left of the arrow

Answer

right of the arrow

Question 3

In this equation, the products are on the

Accepted Answer

right of the arrow

Answer

left of the arrow

Question 4

Because this model shows atoms connected by a chemical bond, you are looking at

Accepted Answer

molecules or compounds

Answer

atoms

Answer

single elements

Question 5

After the predator is introduced, which fish has a BETTER chance of surviving?

Accepted Answer

dark colored fish

Answer

light colored fish

Answer

both light and dark have the same chance of surviving

Question 6

Why would the dark colored fish have a better chance of surviving after the new predator is introduced?

Accepted Answer

The predator cannot see them as well as the fish of the light color

Answer

The predator can move faster than this species of small fish

Answer

The predator predicts where each fish will be

Question 7

Students are asked to make a claim about which design will be both break-resistant and keep the water hot for the longest time. Which claim best meets the two criteria?

Accepted Answer

Bottle 3: It has an unbreakable steel inner lining and a foam cover that will keep the water hot for the longest time.

Answer

Bottle 1: It has an unbreakable steel lining.

Answer

Bottle 2: It has a glass inner lining which is a better insulator

Answer

Bottle 3: It has glass inner lining and a foam cover that will keep the water hot for the longest time.

Question 8

Choose a claim that best agrees with the data.

Accepted Answer

Both mass and distance are variables that affect the gravitational force between two objects.

Answer

Mass does not affect the gravitational force between two objects

Answer

Mass is the only variable that affects the gravitational force between two objects

Answer

Distance is the only variable that affects the gravitational force between two objects

Question 9

MATH REVIEW (EXPONENTS): Which is bigger?

Accepted Answer

1.0 x 10^-8

Answer

2.6 x 10^-9

Answer

6.5 x 10^-10

Question 10

This graph shows almond production in the US since 2012. What is true about the graph?

Accepted Answer

Almond production has increased from 2014-2017

Answer

Almond production has decreased from 2014-2017

Answer

Almond production has stayed the same from 2014-2017

Question 11

Read the image description. What point in the graph represents rapid growth?

Accepted Answer

A

Answer

B

Answer

Neither A nor B

Question 12

Read the image description. What point in the graph represents the paramecium reaching carrying capacity?

Accepted Answer

B

Answer

A

Answer

Neither A nor B

Question 13

Based on this information, which earthquake has the GREATEST likelihood of causing a tsunami to develop?

Accepted Answer

Earthquake B

Answer

Earthquake A

Answer

Earthquake C

Answer

Earthquake D

Question 14

A student wants to show a friend that a magnetic field exists in the region around a permanent magnet. Which demonstration shows that a field exists?

Accepted Answer

A magnet is held near a small metal ball, making it roll across the table

Answer

A magnet touches a paper clip and picks it up from the table

Question 15

A student wants to show a friend that a magnetic field exists in the region around a permanent magnet. Which demonstration shows that a field exists?

Accepted Answer

A small magnet held under a piece of paper with iron filings on top makes the filings move into a pattern that covers the whole piece of paper

Answer

The north pole of a magnet sticks to the south pole of the second magnet when they touch

Question 16

What TWO things are true about PLANTS?

Accepted Answer

Use CO₂ in photosynthesis

Accepted Answer

Produce O₂ that is used in cell respiration

Answer

Produce CO₂ that is used in photosynthesis

Answer

Use O₂ in cell respiration

Question 17

What TWO things are true about ANIMALS?

Accepted Answer

Use O₂ in cell respiration

Accepted Answer

Produce CO₂ that is used in photosynthesis

Answer

Use CO₂ in photosynthesis

Answer

Produce O₂ that is used in cell respiration

Question 18

The student proposes to test the claim in the lab by using metal rods made of Iron, Copper, and Aluminum. In addition to metal rods, which pieces of equipment would be useful for investigating their claim?

Accepted Answer

hot water, pan to hold water, stopwatch, thermometer

Answer

prism, heat lamp, screen, meterstick

Answer

beaker, digital scale, stopwatch, clamps

Answer

litmus paper, beaker, pan balance, battery

Question 19

Which statement describes the most likely impact of the mutation in the mutated sequence?

Accepted Answer

The protein formed will not be the same as that formed from the original DNA

Answer

There will be no effect because the rest of the DNA is normal

Answer

The extra nucleotide will be deleted before the protein is formed

Answer

The mutated DNA will code for the same number of amino acids as the original sequence

Question 20

Students want to determine what effect the eruption had on global climate. Which question should the students investigate to BEST determine the effect?

Accepted Answer

Do aerosol particles of this type cause the amount of solar energy that reaches the Earth's surface to increase or decrease?

Answer

What was the temperature of the lava that flowed onto Earth's surface when Mount Pinatubo erupted?

Answer

Was the amount of rain that fell on Mount Punatubo in the days after the eruption greater or less than average?

Question 21

According to the graph, what evidence is true about the rate of photosynthesis during a La Nina event?

Accepted Answer

During a La Nina event, the light intensity is reduced (as more clouds block sunlight), therefore reducing CO₂ uptake and slowing down the rate of photosynthesis.

Answer

During a La Nina event, the light intensity is increased, therefore increasing CO₂ uptake and increasing the rate of photosynthesis.

Answer

During a La Nina event, the light intensity stays the same, therefore reducing CO₂ uptake and not changing the rate of photosynthesis.

Question 22

Which evidence could be used to CHALLENGE a biologist's claim that purple flowers attract more pollinators than other flower colors do?

Accepted Answer

The purple flowers did not have any butterfly or beetle pollinators

Answer

Bees pollinated the purple flowers 12 times and white flowers only 1 time

Answer

The purple flowers were pollinated 17 times, the white flowers 3 times, and pink flowers 2 times.

Question 23

Which wave characteristics (if any) does the energy of a wave depend on?

Accepted Answer

the amplitude ONLY

Answer

the wavelength ONLY

Answer

BOTH the amplitude and wavelength

Answer

NEITHER the amplitude and wavelength

Question 24

Adding garden lime REDUCES acidity of the soil. Based on the data, if someone adds lime juice to neutral soil over time, what will happen to the acidity of the soil?

Accepted Answer

it becomes more basic

Answer

it becomes more acidic

Answer

it stays neutral

Question 25

Adding garden lime REDUCES acidity of the soil. Based on the data, if someone adds lime juice to neutral soil over time, what color will hydrangea flowers become?

Accepted Answer

pink

Answer

blue

Answer

purple

Question 26

What statement is most likely correct?

Accepted Answer

Layer C is below Layer B, so Layer C is older

Answer

Layer D is younger than Layer C

Answer

Layer A is the oldest layer

Question 27

What statement is most likely correct?

Accepted Answer

Layer A is the youngest layer because it is at the top

Answer

There is no coral fossil in Layer D, so it went completely extinct

Answer

Layer D is younger than Layer C

Question 28

What statement is most likely correct?

Accepted Answer

The ammonite fossil is above the crinoid fossil, so the crinoid fossil is older

Answer

There is no coral fossil in Layer D, so it went completely extinct

Answer

The gastropod fossils are above the crinoid fossil so they for sure evolved from crinoids

Question 29

Which best explains why the embyos are similar in appearance, yet the adults look different?

Accepted Answer

Some developmental processes are shared by vertebrates

Answer

Pigs and chickens are in the same genus

Answer

All vertebrate embryos have the same DNA

Answer

As the embryos grow, they undergo mutations

Question 30

According to the data table, which type of plastic can help conserve natural resources?

Accepted Answer

Plastic B

Answer

Plastic A

Answer

Neither Plastic A or Plastic B

Question 31

Based on this data, what statement is most likely correct?

Accepted Answer

The height of the plants is most directly controlled by genetic factors

Answer

The height of the plants is most directly controlled by environmental factors

Question 32

Based on this data, what statement is most likely correct?

Accepted Answer

Near sea level, the taller plants are better able to survive and reproduce than the shorter plants

Answer

At higher elevations, the taller plants are better able to survive and reproduce than the shorter plants

Question 33

Which model correctly represents the correct number of CO₂and H₂O molecules produced if mass is conserved?

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 34

Based on the model, what should the student say about the role of living organisms in the water cycle?

Accepted Answer

Plants help move water from the soil to the atmosphere

Answer

Animals generate heat that helps evaporate water from the land

Answer

Plant movements create wind that helps draw water into the atmosphere

Answer

Animals create pathways in the mountains that allow water to flow downhill

Question 35

Why might introducing a new fish be a bigger problem than the invasive plant species?

Accepted Answer

The fish might cause a decrease in the number of native, beneficial plants

Answer

The fish might cause an increase in the number of native, beneficial plants

Answer

The fish might attract fisherman to the lake

Question 36

According to the data table, which TWO methods require an external source of energy?

Accepted Answer

Boiling

Accepted Answer

Ultraviolet Light

Answer

filtration system

Answer

chemical disinfectant tablets

Question 37

Water in lakes and streams may contain particles of soil and decaying plants that cloud the water. Which method will MOST LIKELY be effective at making the water clear when removing pathogens?

Accepted Answer

filtration system

Answer

chemical disinfectant tablets

Answer

Ultraviolet Light

Answer

Boiling

Question 38

Which set of forces will allow the students to demonstrate all three cases of motion?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 39

One type of conservation practice is irrigating crops with treated wastewater. Doing this MOST DIRECTLY conserves groundwater by

Accepted Answer

reusing water

Answer

reducing water waste

Answer

providing another source of water

Question 40

One type of conservation practice is using indoor faucet nozzles that limit water flow. Doing this MOST DIRECTLY conserves groundwater by

Accepted Answer

reducing water waste

Answer

reusing water

Answer

providing another source of water

Question 41

One type of conservation practice is using water from a rainwater collection system. Doing this MOST DIRECTLY conserves groundwater by

Accepted Answer

providing another source of water

Answer

reducing water waste

Answer

reusing water

Question 42

Students are designing a solar oven that can be made from materials found in their homes. Solar ovens take more time to heat food than regular ovens. The students would like to build a solar oven that heats food as quickly as possible. What TWO things should they consider?

Accepted Answer

possible ways of preventing or reducing heat loss from the oven

Accepted Answer

designing an oven that will collect as much sunlight and absorb as much heat as possible

Answer

type of food that will be heated

Answer

how often the oven will be used to heat food

Question 43

Students are designing a solar oven that can be made from materials found in their homes. Solar ovens take more time to heat food than regular ovens. The students would like to build a solar oven that heats food as quickly as possible. What would IMPROVE the rate of heating?

Accepted Answer

Covering the interior walls of the oven with a reflective material like aluminum foil

Answer

allowing outside air to circulate inside the oven

Answer

using cookware that is uncovered and open to the atmosphere

Question 44

Which statement BEST describes how the model represents the Sun and Earth?

Accepted Answer

The ball is the Earth, the pole is the Sun, and the rope is the force of gravity

Answer

The ball is the Sun, the pole is the force of gravity, and the rope is the Earth

Answer

The ball is the Sun, the pole is the Earth, and the rope is the force of gravity

Answer

The ball is the Earth, the pole is the force of gravity, and the rope is the Sun

Question 45

Students observed plants in the field and took pictures over the course of 3 years. The observations show that

Accepted Answer

Anderson's thistle population decreases while the Canada thistle population increases

Answer

Anderson's thistle population increases while the Canada thistle population decreases

Answer

Anderson's thistle population decreases while the Canada thistle population stays the same

Question 46

Students observed plants in the field and took pictures over the course of 3 years. Looking at 3 years of observations, the students assume the environmental conditions of the field will stay the same for the next 3 years. What prediction is MOST LIKELY?

Accepted Answer

The field will only have Canada Thistle

Answer

The field will only have Anderson's Thistle

Question 47

Students are conducting an investigation on the rise in average temperatures in their city over the years. They also observed graphs of global temperature rise. They set up the beakers pictured. What should be true about their investigation?

Accepted Answer

It should model the interaction between Earth's atmosphere, greenhouse gases, and sunlight

Answer

It should model the interaction between Earth's atmosphere, greenhouse gases, and humidity.

Answer

It should model the interaction between Earth's atmosphere, greenhouse gases, and landforms.

Question 48

Students measured the temperature of 3 different beakers to model the interaction between Earth's atmosphere and sunlight. Which claim is true based on the graph?

Accepted Answer

A change in CO₂will cause a change in temperature

Answer

A change in temperature causes a change in CO₂

Answer

Changes in CO₂are not connected to changes in temperature

Question 49

What is true about the relative potential energy at various points in the roller coaster diagram?

Accepted Answer

At "1", the potential energy is greater than the potential energy at "3"

Answer

At "3", the potential energy is greater than the potential energy at "4"

Answer

At "4", the potential energy is greater than the potential energy at "2"

Question 50

What is true about the transfer of energy?

Accepted Answer

From point "2" to "3", the energy stored in the train is transformed into kinetic energy, then into motion, thermal, and sound energy

Answer

From point "2" to "3", the energy stored in the train is transformed into potential energy, then into motion, thermal, and sound energy

Question 51

What is true about the transfer of energy from point "3" to point "4"?

Accepted Answer

From point "3" to "4", the kinetic energy is transformed back into potential energy

Answer

From point "3" to "4", the potential energy is transformed back into kinetic energy

Question 52

Measurements of the speed of the train show that energy is being lost. Which claim is true if evidence collected shows the tracks are warmer after the train has passed?

Accepted Answer

The loss of energy is due to the friction of the train wheels to the track

Answer

The loss of energy is due to the air pushing back on the train as it moves down the track

CAST Science 8 Practice Test 2

52 questions

Which model correctly shows that the mass is conserved in the reaction?

In this equation, the reactants are on the

In this equation, the products are on the

Because this model shows atoms connected by a chemical bond, you are looking at

After the predator is introduced, which fish has a BETTER chance of surviving?

Why would the dark colored fish have a better chance of surviving after the new predator is introduced?

Students are asked to make a claim about which design will be both break-resistant and keep the water hot for the longest time. Which claim best meets the two criteria?

Choose a claim that best agrees with the data.

MATH REVIEW (EXPONENTS): Which is bigger?

This graph shows almond production in the US since 2012. What is true about the graph?

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