Break It Down

True or False?

Almost everything in our world is a mixture of two or more things.

• True

• False

A substance is made up of ________ kind(s) of molecule(s).

• one

• two

• three

• four

Tags

NGSS.MS-PS1-1

Which of the following is NOT a mixture?

• apple juice

• paint

• gold

• milk

How can scientists separate the salt from the ocean water?

• freeze the water

• use a filter

• cycle it in a cylinder

• add chemicals

True or False?

Plasma from blood is a solid at room temperature.

• True

• False

Tags

NGSS.MS-PS1-4

What causes the plasma to separate from the blood in a cetrifuge?

• heat from the centrifuge

• the tubes are cooled down in the centrifuge

• gravity in the centrifuge

• the spinning motion of the centrifuge

How did scientists identify mixtures from ancient pottery from 2,700 years ago?

• They used a centrifuge.

• They used a filter.

• They used gas chromatography.

• They were unable to identify the mixtures.

Put the Gas Chromatography steps in the correct order:

• larger particles come out of the tube

• smaller particles come out of the tube

• heat the mixture

• send the gas through a gel tube

• turn the mixture into a gas

Which of the following were NOT in the ancient pottery mixture?

• meat

• beans

• honey

• olive oil

Which picture below is a model of a water molecule?

• 
• 
• 
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Tags

NGSS.MS-PS1-1