CAST Science Practice Test

Leah records properties of the substances she mixed before and after the trials. Which property or properties show that a chemical reaction occurred?

• State of matter ONLY

• Mass

• Color ONLY

• Both state of matter and color

Tags

NGSS.MS-PS1-2

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

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

NGSS.MS-PS3-4

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

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

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

• Pigs and chickens are in the same genus

• All vertebrate embryos have the same DNA

• As the embryos grow, they undergo mutations

• Some developmental processes are shared by vertebrates

Tags

NGSS.MS-LS4-3

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

• atoms

• single elements

• molecules or compounds

Tags

NGSS.MS-PS1-1

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

• 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.

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

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

Tags

NGSS.MS-LS1-6

Leah made a model of the reaction between Iron and Copper Sulfate. However, it needs improvements. Which statement best describes which improvements need to be made?

• The mass of the reactants does not equal the mass of the products.

• The number of atoms for the reactants is different than the products

• The number of atoms for the reactants is the same as the products

• The composition of atoms for the reactants is different than the products

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In this equation, the reactants are on the

• left of the arrow

• right of the arrow

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5