Materials Around Us

Question 1

What are the three different states?

Answer 1

Solids, liquids, gasses.

Question 2

What are the properties of solids?

Answer 2

Fixed shape unless a force is applied, definite space, you can see and hold it.

Question 3

What are the properties of liquids?

Answer 3

It can flow and has no fixed shape. It takes the shape of the container.

Question 4

What are the properties of gasses?

Answer 4

They tend to spread out. No fixed shape. Can be contained.

Question 5

Give 3 examples of each of solids, liquids and gases.

Answer 5

Solids: rocks, books, wood, etc
Liquids: water, juice, oil
Gas: air, hydrogen, helium

Question 6

Name the 3 different states of water.

Answer 6

Solid: ice
Liquid: water
Gas: steam

Question 7

What do we call changing a solid to a liquid?

Answer 7

Melting

Question 8

What do you call changing a liquid to a gas?

Answer 8

Evaporation

Question 9

How do you get something to go from solid to liquid to gas?

Answer 9

Heat it up

Question 10

What do you call getting a liquid to a solid?

Answer 10

Solidifying

Question 11

What do you call getting a gas to a liquid?

Answer 11

Condensation

Question 12

How do you get a material from gas to liquid to solid?

Answer 12

Cool it down

Question 13

What happens to the water volume if you have two saucers with water; one covered in plastic and one uncovered? Why?

Answer 13

Less water in the uncovered one because of evaporation.

Question 14

What makes water in the sea or ocean evaporate?

Answer 14

The suns heat

Question 15

Describe the water cycle.

Answer 15

Water from oceans EVAPORATES into clouds. Water vapour condenses in clouds and then rains. If it solidifies because of extreme cold it could form hail or snow.

Question 16

Describe RAW and MANUFACTURED materials.

Answer 16

Raw materials are materials that occur in nature without human intervention.
Manufactured materials are materials that are raw materials that are processed or changed by humans into something else.

Question 17

Give 4 examples of each of RAW and MANUFACTURED materials.

Answer 17

Raw: wood, seeds, oil, wool
Manufactured: furniture, paper, juice, glass

Question 18

Pick an every day product. What are the RAW materials making it?

Answer 18

Example: clothes.
Raw materials are cotton from trees or wool from sheep.

Question 19

Using the same example of an every day product…how is the raw material processed to make the manufactured product?

Answer 19

Example: clothing
Harvesting of materials, processed by weavers into thread and cloth and then sewn into clothes.

Question 20

What are forests called where wood is grown for manufacturing? What type of trees are most common?

Answer 20

Plantations of eucalyptus (gum trees) or pine.

Question 21

Name the main steps in processing logs for paper.

Answer 21

Pulped at the pulp mill.
Washed, bleached, pressed and dried at the paper mill.
Cut up and given to different purposes eg toilet paper, printer paper, etc.