3rd Grade Part Two Review

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

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

Physical Properties

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

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

Properties of Matter

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°

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

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

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

Energy The ability to cause change The ability to do work

Forms of Energy Mechanical Thermal (Heat) Light Sound

Mechanical Energy Energy in motion

Heat The movement of thermal energy from one place to another

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.

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

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

Light Energy The energy that moves in light waves

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)

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