6th Grade Science - Lesson 1.3, Changes in Matter

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Chemical Building Blocks

physical change

any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance

chemical change

when a substance is transformed into a different substance

two types of physical changes

changes in shape or form

three familiar states of matter

solid, liquid, and gas

Law of Conservation of Mass

the fact that matter is not created or destroyed in any chemical or physical change

endothermic change

a change in which energy is taken in

exothermic change

a change in matter when energy is given off

combustion

a chemical change that releases energy in the form of heat and light

energy

the ability to do work or cause change

temperature

a measure of the average energy of random motion of particles of matter

thermal energy

the total energy of all of the particles in an object

Is a change of state a physical or chemical change?

physical

Is dissolving sugar a physical or chemical change?

physical

When an aluminum can is crushed, is it a physical or chemical change?

physical

Is a physical change or chemical change involved in filtration?

physical

Name other examples of physical change.

bending, crushing, breaking, chopping, and anything else that changes only the shape or form of matter

Why is the melting of an ice cube a physical change?

A change in state, such as from a solid to a liquid or from a liquid to a gas, is an example of a physical change.

How is hydrogen peroxide chemically changed when it is poured on a cut on your skin?

it breaks down into water (H2O) and oxygen (O2) gas

How does the iron metal chemically change when it combines with oxygen from the air?

iron metal combines with oxygen from the air to form the substance iron oxide, know as rust

How is a chemical change different from a physical change?

A chemical change produces a new substance.

List 4 examples of a chemical change.

Combustion,,Electrolysis, Oxidation, Tarnishing

What is another name sometimes used for the Law of Conservation of Mass?

The Law of the Conservation of Matter

Complete the statement - "Every chemical or physical change in matter includes a..."

Every chemical or physical change in matter includes a change in energy.

The total energy of all of the particles in an object is called _______________.

thermal energy

How are temperature and thermal energy related?

Temperature and thermal energy are not the same thing, but temperature is related to the amount of thermal energy an object has. Thermal energy always flows from warmer matter to cooler matter.

When matter changes, the most common form of energy released or absorbed is ____________.

thermal energy

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