1. 3rd Grade Part Two
Review

2. Model
A representation or example of an object or system in the real world

3. Physical Property
Anything that you can observe about an object by using your senses
Color
Shape
Texture
Size

4. Physical Properties

5. Matter Anything that has mass and takes up space
The smallest particle of matter
One atom of many

6. States of Matter Solids Liquids Gases
Particles are close together with little room to move.
Solids
Particles have room to slide past each other.
Liquids
Particles have lots of room to move around.
Gases

7. Properties of Matter

8. Temperature Temperature is measured with a thermometer.
Measured in °C (degrees Celsius)
Freezing Point of Water = 0°C
Boiling Point of Water = 100°C 0°
100°

9. The volume of the liquid in the beaker is 200 mL.
The amount of space that matter takes up

10. Measuring Volume Tools – graduated cylinder, beaker
Units – mL – milliliter
L – liter

11. Mixtures Two or more substances are mixed
Can be separated in different ways: magnet, strainer, or heat

12. Energy
The ability to cause change
The ability to do work

13. Forms of Energy
Mechanical
Thermal (Heat)
Light
Sound

14. Mechanical Energy
Energy in motion

15. Heat
The movement of thermal energy from one place to another

16. Thermal Energy
As thermal energy is removed, particles slow down. A gas turns to a liquid and a liquid turns into a solid.
Heat energy that moves the particles in matter
When thermal energy is added, particles move faster. A solid begins to melt and a liquid begins to change to a gas.

17. Thermal Energy Always Moves From a Hot Place to a Cold Place
The thermal energy from the hot chocolate moves to your cooler hand
The thermal energy from your warmer hand moves to the cold ice cream

18. Conductor Insulator A material in which thermal energy moves easily
A material in which thermal energy does NOT move easily

19. Light Energy
The energy that moves in light waves

20. Light travels in straight lines
Light travels in straight lines. It can also bounce back, turn or stop when it reaches different types of matter.
Reflect
(bouncing)

21. Sound Energy
Energy that travels in waves through vibrating matter, such as the music we hear from a radio.