9th Grade- Chapter 10 Test Review

A substance made of two or more elements that cannot be separated by physical means is called a:

• compound

• homogeneous mixture.

• heterogeneous mixture.

• multi-element.

Which of the following is true of a heterogeneous mixture?

• It is not possible to separate the various parts of the mixture

• Taking one sample will enable you to determine what it is made of

• Different samples may not be exactly alike.

• The density is the same throughout the entire mixture.

The name for a mixture in which all samples are made up of the same proportions of matter is:

• pure substance

• homogeneous

• heterogeneous

• homologous

The movement of pollen molecules in water called Brownian motion is caused by:

• air currents in the room

• impact of individual water molecules with the pollen grains

• motion of flagella on the surface of the pollen grains.

• convection currents in the water.

A compound:

• is made of more than one kind of element.

• cannot be separated by physical means.

• is classified as a substance.

• All of the above

One of the following is correctly termed a substance, and the others are mixtures. The substance is:

• milk

• copper

• granite

• chicken noodle soup

Which of the following is an examples of a heterogeneous mixtures?

• blood

• air

• gold

• sugar

Physical properties used to indicate temperature changes include all of the following EXCEPT:

• color changes of liquid crystals

• volume changes of fluids and solids

• changes in electrical resistance

• odor changes in solids

Tags

NGSS.MS-PS1-4

The temperature at which water molecules have the LEAST amount of thermal energy is:

• 0ºC

• 32ºF

• -273 K

• 0 K

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which phase of matter is most common in the universe?

• Plasma

• Solid

• Liquid

• Gas