S8P1ab Review

Which statement best describes what will occur if enough thermal energy is removed from the system to cause a change in state?

• Molecular energy will increase, and the substance will change from a liquid to a gas

• Molecular energy will increase, and the substance will change from a gas to a liquid.

• Molecular energy will decrease, and the substance will change from a liquid to a gas.

• 
  Molecular energy will decrease, and the substance will change from a gas to a liquid.

Tags

NGSS.MS-PS1-4

When you heat a sample of a gas, what happens to the particles that make up that gas?

• They move faster and spread apart.

• They move slower and become more dense.

• 
  They become much smaller and take up less space.

• They become much larger and take up more space.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which statement best describes what is occurring at segment C?

• As energy increases, the temperature remains the same.

• As energy increases, temperature also increases.

• As temperature increases, energy remains the same.

• Energy and temperature remain the same.

Tags

NGSS.MS-PS1-4

In which state of matter do particles move the least?

• plasma

• gas

• liquid

• solid

A student makes two mixtures, both made of the same substances. What must be true of the two mixtures?

• Both mixtures have the same density.

• 
  Both mixtures have the same temperature.

• Both mixtures can be physically separated into its components

• Both mixtures are physically combined in the same proportions.

Which statement best describes this demonstration?

• Step one contains a compound, which is chemically combined in step two, forming a mixture in step three.

• Step one contains a mixture of elements, which are chemically combined in step two, forming a new compound in step three.

• Step one contains a mixture of elements, which are physically combined in step two, forming a new compound in step three.

• Step one contains a compound, which is physically combined in step two, forming a mixture in step three.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which of the following are NOT a heterogeneous mixture?

• orange juice

• chicken noodle soup

• lucky charms

• sugar dissolved in water

Which of the following observations is the BEST evidence that unknown liquid X is composed of only one pure substance?

• 
  Liquid X can be easily dissolved in water.

• Liquid X appears clear and uniform throughout.

• Liquid X forms a solid when added to hydrochloric acid

• Liquid X boils away completely at a single temperature.