Chemical World

Question 1

What is all Matter made up of?

Answer 1

Atoms

Question 2

Solids are

Answer 2

Tightly packed
They vibrate on the spot
Have little energy

Question 3

Liquids are

Answer 3

Loosely packed particles
Particles roll over each other
Particles have more energy

Question 4

Gas

Answer 4

Free particles
Particles move away from each other
Particles have lots of energy

Question 5

List 4 solids

Answer 5

Book
Glasses
Cheese
Key

Question 6

List 4 Liquids

Answer 6

Rain drops
Water
Ice Tea
Milk

Question 7

List 4 Gases

Answer 7

LPG (BBQ)
Steam
Helium
Oxygen

Question 8

What is Density?

Answer 8

It’s how closely the particles (atoms) are in a state of matter. (solid, liquid, gas)
The more closely they are packed the more dense the substance.
The more heavier a substance is the more dense it is.

Question 9

What are the 3 basic properties of matter?

Answer 9

Volume
Mass
Shape

Question 10

What is matter made up of?

Answer 10

Atoms

Question 11

What is volume the amount of?

Answer 11

Space

Question 12

What does not have a definite shape?

Answer 12

Gases and liquids

Question 13

What does not have a definite shape, but does have a definite volume?

Answer 13

Liquids

Question 14

What has a definite shape and volume?

Answer 14

Solids

Question 15

What is a physical change?

Answer 15

It’s a change of state.

Question 16

What is a Chemical change?

Answer 16

It’s when particles arrange differently and in different ways to make a new substance.

Question 17

What are the 3 States of Matter?

Answer 17

Solid
Liquid
Gas

Question 18

When’d does a physical change occur?

Answer 18

When substances change in some way without forming a new substances. And change is reversible.
Example
Ice Water Steam
Cutting paper into pieces is still paper

Question 19

When does a chemical change occur?

Answer 19

It occurs whenever a new substance is formed and is NOT reversible.
Example
Jelly crystals becomes jelly
Raw egg becomes cooked egg