MCAS Science Review

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

Methane and propane are two compounds that are composed only of carbon and hydrogen atoms. The table below shows some of the properties of these two compounds. Which of the following conclusions is best supported by the information in the table?

• When two elements combine, the mass of each element changes.

• When two compounds are mixed, the state of matter of the mixture changes.

• Two elements can combine to produce different substances with different properties.

• Two compounds can be mixed together to produce different materials with different properties.

Tags

NGSS.MS-PS1-1

In an investigation, an exothermic reaction occurred as energy was released. what is the best evidence that an exothermic reaction occurred in the beaker?

• The mass decreased

• The bubbling stopped

• There was a change in color.

• There was an increase in temperature

Tags

NGSS.MS-PS1-4

Carbon dioxide is an example of

• a mixture

• an element

• a solution

• a compound

Tags

NGSS.MS-PS1-1

The diagrams represent three phases of matter. What are those three in order (A,B,C)?

• Liquid, Gas, Solid

• Solid, Liquid, Gas

• Solid, Gas, Liquid

• Liquid, Solid, Gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagram represents a sodium atom bonding to a chlorine atom to form sodium chloride. Which statement is supported by this diagram?

• Sodium chloride is an element

• Sodium chloride is a mixture

• Sodium chloride is a compound

• Sodium chloride is composed of only one atom.

Tags

NGSS.MS-PS1-1

Sucrose (C₁₂H₂₂O₁₁) is also known as table sugar. What is the smallest unit of sugar that maintains the chemical characteristics of sugar?

• an atom

• an element

• a grain

• a molecule

Tags

NGSS.MS-PS1-1

The density of sulfur is 2.0 g/cm³. The volume of a sample of sulfur was calculated to be 5.0cm³. What is the mass of that sample?

• 2.5 g

• 2.0 g

• 5.0 g

• 10.0 g