Chapter 10: Changes in Matter Review

Chapter 10: Changes in Matter Review

When matter is heated...

• Changing from a solid to a liquid is MELTING.

• Changing from a liquid to gas is BOILING or EVAPORATION

• Boiling is adding heat to a liquid to make it bubble by adding energy from the heat creating a water vapor.

• Evaporation is letting the liquid turn to water vapor by sunlight or natural means.

When matter is cooled...

• Changing from a gas to a liquid is called CONDENSATION.

• Changing from a liquid to a solid is called FREEZING.

• This occurs because the particles slow down due to having less energy.

• When water freezes it gets bigger or expands. This allows ice to float and stay above the water, so the living things can survive under the ice.

Multiple Choice

Water vapor is the ________ state of water

• Solid

• Liquid

• Gas

Multiple Choice

Which word means to change from a solid to a liquid?

• Melt

• Boil

• Freeze

• Condense

Multiple Choice

What happens when water freezes?

• It shrinks

• It stays the same

• It gets larger

Physical Changes

• A change is the way matter looks.

• A change is size, shape or form of matter.

• Changes of states are always physical changes.

Mixtures

• It's a physical change.

• Easily separated.

• Think about a salad, spaghetti and meatballs or vegetable soup.

Solutions

• A mixture where one matter is mixed EVENLY with another matter.

• Solutions can be made from liquids (salt water), solids (brass) and gases (air we breathe)

• Solutions can be seaparated by using evaporation.

More examples of Separating Mixtures and Solutions

• Using sink or float properties to separate matter.

• Using a filter to separate solids from liquids or large solids from small solids.

• Using a magnet to separate metals from non-metals.

Multiple Choice

Which of the following is NOT a mixture?

• Salad

• Cake

• Milk

• Salt water

Chemical Changes

• Causes a new matter to form with different properties than the original matter.

• Very common everyday. Metals rusts, food is digested, photosynthesis, cooking food.

• Can not be reversed

• Signs of a chamical change: Light and heat, formation of a gas, natural color change.

Multiple Choice

Which of the following represents a chemical change in an apple?

• being peeled

• turning brown

• cutting it

Multiple Choice

What kind of change is taking place in this picture?

• Physical Change

• Chemical change

Multiple Choice

What kind of change is taking place in this picture?

• Physical Change

• Chemical Change

Multiple Choice

What kind of change is taking place in this picture?

• Physical Change

• Chemical Change

Multiple Choice

What kind of change is taking place in this picture?

• Physical Change

• Chemical Change