MCAS Questions Middle School

Which of the following provides the best evidence that a chemical change is taking place?

• A liquid forms as a solid object melts.

• A flame burns on the surface of a solid.

• Steam rises from the surface of a liquid.

• A metal object becomes shorter when it is cooled.

Tags

NGSS.MS-PS1-2

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

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

Which of the following best describes a mixture?

• a material that is made up of many molecules

• a substance that can be changed into another substance

• a material that contains two or more different substances

• a substance that has been broken down into its smallest parts

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

During a physical or chemical change there is always a change in _______________.

• Matter

• Energy

• Light

• Chemical

Tags

NGSS.MS-PS1-5

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When matter changes and energy is released we call this a __________ change.

• Particle

• Atomic

• Endothermic

• Exothermic

When matter changes and energy is absorbed we call this a __________ change.

• Particle

• Atomic

• Endothermic

• Exothermic

Tags

NGSS.MS-PS1-4

Can a change in matter take place in which energy is neither absorbed or released?

• Yes, changes in matter do not require a change in energy

• No, all changes in matter require a change in energy

• Only during physical change

• Only during chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The average energy of motion in particles of matter is

• Thermal Energy

• Temperature

• Heat

• Particle

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4