CAST Science Practice Test

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

• A

• B

• Neither A nor B

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student reviews the model shown and says that, based on the model, a solar eclipse should happen every time there is a new moon. However, solar eclipses occur less often than New Moons. Which feature of the model should be revised to best explain why solar eclipses do not happen every month?

• The model should show that the shape of the Earth's orbit around the Sun is an ellipse.

• The model should show that the shape of the Moon's orbit around the Earth is an ellipse.

• The model should show that Earth's equator is inclined relative to the plane of Earth's orbit around the Sun.

• The model should show that the plane of the Moon's orbit around the Earth is inclined relative to the plane of Earth's orbit around the Sun.

Tags

NGSS.MS-ESS1-1

What statement is most likely correct?

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

• Layer D is younger than Layer C

• Layer A is the oldest layer

Tags

NGSS.MS-ESS1-4

Use the graphs and the partial food web to predict the changes in the sea urchin population as the kelp pupulation INCREASES. What will happen to the sea urchin population?

• Sea urchin population increases

• Sea urchin population decreases

• Sea urchin population remains steady

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How many atoms make up CuSO₄ ?

• 1

• 4

• 5

• 6

Tags

NGSS.MS-PS1-1

Leah conducts an investigation by mixing Fe with CuSO₄ and makes a model to help explain why the total mass did not change. Leah's model can also be used to show that a chemical reaction occurred because the products

• are the same size as the reactants

• have the same composition as the reactants

• are at different states of matter compared to the reactants

• have differently arranged atoms compared to the reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Use the graphs and the partial food web to predict the changes in the kelp population as the kelp pupulation INCREASES. What will happen to the kelp population?

• Kelp population increases

• Kelp population decreases

• Kelp population remains steady

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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?

• prism, heat lamp, screen, meterstick

• beaker, digital scale, stopwatch, clamps

• litmus paper, beaker, pan balance, battery

• hot water, pan to hold water, stopwatch, thermometer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A student conducts 5 trials to investigate factors affecting the formation of impact craters and here are the results. What is true about the results of the experiment?

• As the speed of the marble increases, the depth of the crater increases

• As the speed of the marble increases, the depth of the crater decreases

• As the speed of the marble increases, the depth of the crater stays the same

Tags

NGSS.MS-PS3-1

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

• The purple flowers did not have any butterfly or beetle pollinators

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

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

Tags

NGSS.MS-LS2-1