NST term 2 - states of matter

Question 1

What is a solid?

Answer 1

A substance fixed shape

Question 2

What is a liquid?

Answer 2

A substance that does not have a fixed shape and can flow

Question 3

What is a substance?

Answer 3

Any type of solid, liquid or gas

Question 4

What is a gas?

Answer 4

a substance that has no shape and can move around freely

Question 5

How do you change the shape of a solid?

Answer 5

The only way is by FORCE

Question 6

What does FLOW mean?

Answer 6

the way a liquid moves and spreads. A liquid CHANGES SHAPE by flowing into a different container.

Question 7

Name examples of solids

Answer 7

Table, pen, apple

Question 8

What shape are gases?

Answer 8

Gases can any shape. They can also be contained in a container (like a balloon or a can)

Question 9

What state of matter are milk, water and oil?

Answer 9

They are liquids

Question 10

Name examples of gases

Answer 10

The air we breathe
Helium (often in balloons)

Question 11

What are the states of matter?

Answer 11

Solid, liquids and gases

Question 12

What is matter?

Answer 12

Matter is everything around us.
Itmakes up all the materials and substances that exist on earth.

Question 13

What makes a substance change state?

Answer 13

HEAT
A substance changes state when it gains heat or loses heat
e.g. a liquid becomes a gas when it gains enough heat, and become a solid when it gets cold enough

Question 14

What does it mean to melt?

Answer 14

Melting is when a solid gains heat to become a liquid.
Solids MELT into liquids when they are heated

Question 15

What does it mean to evaporate?

Answer 15

Evaporating is when a liquid changes into a gas when they’re heated enough

Question 16

What does condense mean?

Answer 16

Condense is what happens when a gas cools down to change into a liquid

Question 17

What does solidify mean?

Answer 17

When a liquid loses heat to become a solid.
eg. freezing

Question 18

What is a melting point?

Answer 18

The temperature at which a material melts

Question 19

What is temperature?

Answer 19

A measure of how hot or cold something is

Question 20

What does it mean to predict?

Answer 20

To say what you think will happen before it happens

Question 21

What does a liquid need to evaporate?

Answer 21

Enough HEAT

Question 22

What does gas need to become a liquid?

Answer 22

To lose enough heat / COOL down

Question 23

What do we use to measure temperature?

Answer 23

a thermometer

Question 24

What unit of measurement doe we use to measure temperature?

Answer 24

degrees Celsius / Centigrade

Question 25

What is the freezing and boiling point of water?

Answer 25

Water freezes (i.e. becomes solid) at 0’C
and boils (becomes a gas called water vapour) at 100’C

Question 26

How does a thermometer work?

Answer 26

LIQUID in the bulb & a TUBE moves up when it gets hotter and down when it is cooler.
There are numbers on the tube to mark different temperatures
The number that the liquid STOPS at is the number of the temperature.

Question 27

What is the water cycle? Describe it.

Answer 27

the MOVEMENT of WATER around and around
from the LAND and SEA to the AIR and back again
by CHANGING STATE by the processes of
- evaporating,
- condensing
- freezing and
- melting

Question 28

Why is the water cycle important?

Answer 28

Earth has limited amount of water

Question 29

What is precipitation?

Answer 29

Rain, snow and other forms of water falling from clouds

Question 30

Show the 5 steps of the water cycle in a circle

Answer 30

1. Water vapour cools & condensed
2. Clouds form
3. Rain falls, bringing liquid water to earth
4. The sun heats water on earth
5. Water evaporates
   (then goes back to 1.)