3
2Keywords:
changes
corrosion
fair testing
metals
rust
self assessment
variables
Task: Identify the variables for testing how fresh water and salt water affect rusting. Assessment focus: planning a fair test.
2
0
8
2
6
4
5
2
4
3
2
2
4
2
4
2
1
1
1
2
1
3
3
3
0
