3
1Keywords:
changes
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.
Displaying results 1 to 2 of 2.
15
0Keywords:
changes
fair testing
iron
rust
Students look at two diagrams. The first shows iron nails in test tubes with boiled water or tap water, the second shows iron nails with moisture either present or absent. Students answer five questions about these investigations.