1. STUDY ISLAND MCAS REVIEW Physical Science
Assignment #7
Properties of Matter
Elements, Compounds & Mixtures
Physical & Chemical Changes

2. Matter Matter is defined as anything that has mass and takes up space
Remember that mass is the total amount of material in an object
CHALLENGE QUESTION:
When an astronaut travels to the
moon, does his/her mass change?

3. An object’s mass is the same on the Moon as it on Earth.
Answer:
An object’s mass is the same on the Moon as it on Earth.
The amount of matter does not change.

4. Measuring Matter Volume (Unit=mL, cm3)
We can measure volume, the amount of space an object takes up, by measuring:
length x width x height
Mass (Unit=grams) We can measure mass, the amount of material in an object, using a balance.

5. Measuring Matter Volume (Unit=mL, cm3)
We can measure volume of an irregular shaped object using water displacement method
We can measure liquid
volume using a graduated cylinder.

6. Important Note About Matter
It is important to remember that almost everything is made up of matter and has mass, but ENERGY IS NOT MATTER
Therefore, energy such as heat, sound, and light has no mass or volume

7. The Periodic Table of the Elements
__________ are pure substances, such as hydrogen, carbon, oxygen.
___________ is the smallest particle of an element that has the properties of that element.

8. The Periodic Table of the Elements
ELEMENTS are pure substances, such as hydrogen, carbon, oxygen.
ATOM is the smallest particle of an element that has the properties of that element.

9. Atoms Atoms are composed of smaller subatomic particles called Protons
Neutrons
Electrons

10. Molecules and Compounds
Two or more atoms combine to form a molecule.
Two or more elements combine to form a compound.
CHALLENGE:
Which of the diagrams to the left are molecules? Which are compounds?
Can you identify the compound names?
Red=Oxygen, Blue=Hydrogen, Black=Carbon

11. Physical Change
A change of matter from one form to another without a change in chemical properties
Chemical Change
A change that occurs when one or more substances change into entirely new substances. Chemical changes cannot be reversed.

12. Phase Change When water changes phase (solid, liquid, gas),
does that represent a physical or chemical change?