Unit 6: Lesson 4, 5 and 6

Which type of substance is always made up of a single type of atom?

• mixture
• element
• molecule
• compound

Which of the following is a way in which elements and compounds are similar?

• Elements and compounds are both pure substances
• Elements and compounds are both listed on the periodic table
• Elements and compounds are both made up of different kinds of atoms
• Elements and compounds can both be broken down by physical changes.

Which state of matter will take both the volume and shape of the container that holds it?

• gas
• ice
• liquid
• solid

Dry ice is solid carbon dioxide. At room temperature, it changes directly into a gas. A model of which of the following would describe this change?

• Evaporation results in a reduction of the mass of carbon dioxide
• Freezing occurs due to a decrease in kinetic energy of the particles
• Sublimation occurs due to an increase in kinetic energy of the particles
• Deposition causes the particles of the carbon dioxide gas to lock into place

Tags

NGSS.MS-PS1-4

Steve notices water droplets on the grass in the morning. It did not rain during the night. Which statement is true about this change of state?

• Mass was added to the water particles, resulting in deposition.

• Energy was added to the water particles, resulting in evaporation.

• Mass was removed from the water particles, resulting in sublimation.

• Energy was removed from the water particles, resulting in condensation.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which changes of state result in a decrease in the kinetic energy of the particles?

• sublimation, melting, boiling
• melting, freezing, evaporation
• sublimation, deposition, melting
• deposition, freezing, condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Pure substances are made up of only ________ type(s) of particle(s).

• one
• two
• three
• four

Tags

NGSS.MS-PS1-1

When a pure substance undergoes a __________________, it is no longer that same substance.

• chemical change
• physical change
• chemical property
• physical property

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Elements, molecules and compounds are ALL pure substances.

• True
• False

There are approximately ____________ elements known to exist.

• 10
• 100
• 1000
• 150