1. Liam is testing whether the distance between a torch and a toy changes the length of the toy's shadow on a wall. For each thing in his test, tick whether it is the variable he changes, the variable he measures, or a variable he keeps the same.
| he changes it | he measures it | he keeps it the same | |
|---|---|---|---|
| the toy he uses | |||
| the length of the shadow on the wall | |||
| the torch he uses | |||
| the distance from the torch to the toy | |||
| the distance from the toy to the wall |