QUIZ REVIEW: Topic 2- Physical Changes in Matter

A physical change is a change that:

(a)  

• alters the chemical composition of a substance

• changes the physical properties without changing t
• creates a new substance

Fill in the blank: A physical change is when some properties of a matter change, but it does not form a different kind of _______.

• matter

• energy

• substance

• element

Fill in the blank: Some physical changes give matter a different shape (bend/breaking/stretching/smash/etc) & some properties change but it's still the same substance with the same total _______.

• properties

• mass

• volume

• shape

Fill in the blank: The volume of air changes when air temp changes. Ex: _______air = shrinkage, _____ air = expansion.

• cold, hot

• hot , cold

Fill in the blank: Freezing/melting occur at the same temp of 0°C (32°F) & boiling point occurs at 100°C (212°F). Once the temp of a liquid reaches boiling point, the liquid particles change to a _______ within the liquid, the gas particles move quickly upward through the liquid, steam/bubbles appear, & _______ will occur.

• gas , evaporation

• solid, condensation

• liquid, steam

What is the temperature range for solids?

• -10°C to 0°C

• 0°C to 100°C

• 100°C to 110°C

Fill in the blank: Liquids have a definite volume but no definite ______.

• shape.

• volume.

• mass.

What is the behavior of molecules in gases?

• Tightly packed

• Slide past each other

• Fly around and move fast

Emma placed a canned liquid drink in a freezer. She removed the can 12 hours later. The pictures show the can before and after Emma put it in the freezer. Which best explains what Emma observed?

• The liquid in the can changed and is now a different substance.

• The liquid in the can froze and expanded when it became a solid.

• The liquid in the can evaporated, causing some of the liquid to be lost.

Tom is heating some water to cook pasta. What evidence can you see that the water is changing to a gas? Select TWO correct answers.

• The water changes color.

• There is steam above the pan.

• The water is at a lower temperature.

• There are gas bubbles in the water.