nst term 2 - properties of materials

Question 1

what are properties

Answer 1

what a material LOOKS like and how I BEHAVES

Question 2

what does waterproof mean

Answer 2

it does not let water pass through

Question 3

what does flexible mean

Answer 3

the material can bend easily

Question 4

what does dent mean

Answer 4

to make a hollow on a surface

Question 5

what does stiff mean

Answer 5

the material does not bend easily

Question 6

what does examine mean

Answer 6

to find more out about something

Question 7

what does absorbent mean

Answer 7

to soak up liquid

Question 8

How can you test how hard something it?

Answer 8

See how easy it is to scratch, cut or dent it

Question 9

What are the 5 main properties of materials?

Answer 9

1. Hard or Soft
2. Stiff or flexible
3. Strong or weak
4. Light or heavy
5. Waterproof or absorbent

Question 10

what is folding

Answer 10

bending something over on itself to strengthen a sheet of material

Question 11

what is a factor

Answer 11

things that play a role in the result

Question 12

what is a control

Answer 12

a object or material were nothing is changed

Question 13

what is an experiment

Answer 13

a test where only 1 factor is changed at time

Question 14

What is a fair test?

Answer 14

When we test everything on the same way

Question 15

What are the two parts that a fair test can/should have?

Answer 15

The CONTROL - where all the factors are kept the same
and the EXPERIMENT - where we change only one factor

Question 16

what is a bar graph

Answer 16

a diagram that shows information in bars or columns

Question 17

what are struts

Answer 17

lengths of strong material that are joined to make a strong frame

Question 18

what is a frame structure

Answer 18

a structure that is made from different parts

Question 19

What are two ways to strengthen materials?

Answer 19

Folding
Rolling into long thin tubes or struts (circular, triangular or square pillars)

Question 20

What is a frame structure?

Answer 20

Structures made of different parts that are joined to make a frame that holds things up, to give a shape or to bridge a gap

Question 21

What is triangulation?

Answer 21

Where struts are joined into the shape of a triangle to make a strong and stable frame. Putting even small triangles into a structure is called triangulation

Question 22

Where is triangulation used?

Answer 22

In roof trusses, bridges, cranes, pylons, skeletons

Question 23

What are triangular struts for

Answer 23

To prevent the - sides of a structure from splitting open at a corner joint, and
- sides of a structure from moving closer to together at the corner joints

Question 24

What are frame structures used for

Answer 24

To hold things up
To give things shape
To bridge a gap between two places