MCAS Review

The arrow in the picture points to a part of the Golden Gate Bridge made of concrete.

Fill in the blanks to explain why the engineers used concrete to build this part of the bridge.

Concrete is _________ , so this part of the bridge can ________________

• very heavy

• low in density

• high in strength

• float on top of the water

• support a large amount of weight

A student makes a ball-and-stick model of a propane molecule, as shown below. The black balls represent carbon atoms, and the white balls represent hydrogen atoms.

Based on the model, what is the chemical formula of propane?

• C₃H₈

• C₃H₁₀

• 3CH

• 3CH₈

Tags

NGSS.MS-PS1-1

Which of the following statements describes what most likely occurs when thermal energy is removed from a liquid?

• The mass of the liquid

  decreases.

• The temperature of the liquid

  decreases.

• The molecules of the liquid

  move faster.

• The molecules of the liquid

  stop moving

Tags

NGSS.MS-PS1-4

The freezing point of nitrous oxide is -91°C. Which of the following statements best describes the effect on the particles in liquid nitrous oxide as its temperature is lowered to -91°C?

• The speed of the particles

  decreases.

• The particles begin to move in

  a straight line

• The particles begin to move with

  a greater force.

• The motion of the particles becomes

  more random

Tags

NGSS.MS-PS1-4

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Ask a question

Conduct experiment

Draw conclusions

Communicate results

Form a hypothesis

Tags

NGSS.MS-PS2-2

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

• the amount of matter in

  the block

• the amount of space the block

  takes up

• the force of gravity acting on the

  block

• the distance between the molecules

  in the block

A student makes this particle model of atoms that make up part of the bridge. The model shows the atoms when the bridge is at 18°C. The student wants to make a new model to show the atoms when the bridge is heated to 23°C. Which of the following changes should the student include in the new model?

• making the atoms bigger

• making the atoms a different shape

• making larger spaces between the atoms

• making chemical bonds between the atoms

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagrams represent the movement of particles in two samples of the same gas. The samples are in identical, closed, glass containers. The length of an arrow represents the speed of a gas particle.

Which of the following must be different between the two samples?

• color

• mass

• temperature

• volume

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following is the best example of heat being transferred by conduction?

• ocean currents moving warm water to cold water

• mountain boulders warming up in bright sunlight

• rocks buried in sand absorbing heat from surrounding sand

• air masses moving from high-pressure to low-pressure regions