Particle model and separating methods

Question 1

What is the particle model?

Answer 1

The particle model is a theory that describes matter as being made up of tiny particles that are in constant motion.

Question 2

True or False: The particle model applies to solids, liquids, and gases.

Answer 2

True

Question 3

Fill in the blank: In the particle model, particles are held together by __________ forces.

Answer 3

attractive

Question 4

What state of matter has particles that are closely packed together and can only vibrate in place?

Answer 4

Solid

Question 5

Which state of matter has a definite volume but takes the shape of its container?

Answer 5

Liquid

Question 6

In which state of matter are particles far apart and move freely?

Answer 6

Gas

Question 7

What happens to the particles in a solid when it is heated?

Answer 7

They gain energy and vibrate more, potentially changing to a liquid.

Question 8

Which separation method uses a filter to separate solids from liquids?

Answer 8

Filtration

Question 9

True or False: Evaporation can be used to separate dissolved solids from liquids.

Answer 9

True

Question 10

What is the process called when a liquid is turned into vapor and then condensed back into a liquid?

Answer 10

Distillation

Question 11

Fill in the blank: The technique of __________ separates mixtures based on particle size.

Answer 11

sieving

Question 12

What type of mixture can chromatography separate?

Answer 12

Solutions

Question 13

Which separation method is best for separating colored dyes in ink?

Answer 13

Chromatography

Question 14

What is the primary force that keeps particles in a solid close together?

Answer 14

Intermolecular forces

Question 15

Fill in the blank: In gases, particles are __________ spaced apart compared to solids and liquids.

Answer 15

farther

Question 16

What is the term for the change of state from liquid to gas?

Answer 16

Vaporization

Question 17

True or False: The boiling point is the temperature at which a liquid turns into a gas.

Answer 17

True

Question 18

What happens to the particles in a gas when it is cooled?

Answer 18

They lose energy and move closer together, potentially forming a liquid.

Question 19

Which separation method involves spinning a mixture to separate its components based on density?

Answer 19

Centrifugation

Question 20

What is the main principle behind the separation method of distillation?

Answer 20

Different boiling points of substances.

Question 21

Fill in the blank: A __________ mixture has a uniform composition throughout.

Answer 21

homogeneous

Question 22

What is the difference between a solute and a solvent?

Answer 22

A solute is the substance being dissolved, while a solvent is the substance doing the dissolving.

Question 23

True or False: Solids can be separated from liquids using evaporation.

Answer 23

True

Question 24

What is the process of separating a solid from a liquid by pouring off the liquid called?

Answer 24

Decanting

Question 25

Fill in the blank: The particles in a __________ are not arranged in any specific order.

Answer 25

gas

Question 26

What does the term 'saturation' refer to in a solution?

Answer 26

The point at which no more solute can dissolve in the solvent.

Question 27

Which separation technique would you use to separate a mixture of sand and salt?

Answer 27

Filtration followed by evaporation.

Question 28

True or False: All mixtures can be separated by physical means.

Answer 28

True

Question 29

What does chromatography separate based on?

Answer 29

The different rates at which substances move through a medium.

Question 30

Fill in the blank: The __________ is the state of matter where particles are tightly packed and vibrate in place.

Answer 30

solid