Centrifugal Force Quiz

What does a centrifuge do?

• It measures the volume of liquids.

• It heats up substances.

• It separates particles from liquid.

• It combines different substances.

What force does a centrifuge use to separate particles from liquid?

• Gravitational force

• Centrifugal force

• Magnetic force

• Electrical force

What is the main difference between a centrifuge and letting a mixture sit to separate?

• A centrifuge uses heat.

• A centrifuge is slower.

• A centrifuge uses centrifugal force.

• A centrifuge requires electricity.

What is a hematocrit?

• A type of fish

• A measure of the number of red blood cells in the blood

• A type of centrifuge

• A scientific paper

Why must tubes in a centrifuge be balanced?

• To make it quieter

• To increase the speed

• To prevent chemical reactions

• To prevent damage to the centrifuge

What is the pellet in a centrifugation process?

• The liquid on top

• The tube used in the centrifuge

• The particles smashed down at the bottom of the tube

• The centrifuge itself

What should you do if you have a tube without a partner across from it in a centrifuge?

• Run the centrifuge at half speed

• Use an extra tube with a similar volume as a balance

• Leave it empty

• Fill it with water

What units are used to set the speed of a centrifuge?

• Degrees Celsius

• RPM or RCF

• Liters per minute

• Watts

What happens if you jostle the tubes after centrifugation?

• The particles will mix up again

• Nothing

• The tubes will break

• The centrifuge will start automatically

What is the supernatant?

• The bottom layer of particles

• A type of centrifuge

• A measurement unit

• The top liquid layer after centrifugation