Chapter 2 The Nature of Matter

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created 7 years ago by streece
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8th grade
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1

Every form of matter has two kinds of properties. What are they?

Physical and Chemical

2

What is matter?

Anything that has mass and takes up space.

3

What is an example of a physical property?

Color, density, hardness, texture

4

What is an example of a chemical property?

Flammability, ability to rust, ability to tarnish

5

What cannot be broken down into any other substance by chemical or physical means?

Element

6

Hydrogen is an example of what?

Element

7

Elements combine with other elements to form?

Compounds

8

Give an example of a compound.

H20, COH

9

What is a mixture?

Made of two or more substances that are together in the same place but not chemically combined.

10

What is the difference between a heterogeneous mixture and a homogeneous mixture?

You can easily see the different parts in a heterogeneous mixture where in a homogeneous mixture you cannot.

11

When atoms combine, they form a force of attraction between two atoms which is known as a...?

chemical bond

12

Groups of atoms held together by chemical bonds form what?

molecules

13

True or False
A substance that undergoes a physical change is the still same substance after the change.

True

14

What does the law of conservation of matter state?

Matter is not created or destroyed during any chemical or physical change.

15

What is the ability to do work or cause change?

energy

16

What is temperature?

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

17

What is the total energy of all the particles in an object?

Thermal energy

18

Endothermic changes means energy is being...?

absorbed (in)

19

Exothermic changes means energy is being...?

released (exit)

20

The energy stored in the chemical bonds between atoms is what kind of energy?

chemical energy

21

The form of energy that travels through space as waves is known as...?

electromagnetic energy

22

What is electrical energy?

The energy of electrically charged particles moving from one place to another.

23

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

energy