What materials work best in a sandbag for preventing a flood?

Experiment: What materials work best in a sandbag for preventing a flood?

Aim: To determine what materials work best in a sandbag for preventing a flood.

Now that I’ve gotten Miss Zhang’s approval I will commence with some more research on my chosen experiment - “What materials work best in a sandbag for preventing a flood?” - such as:

- how a flood works/is caused
- methods (what they constructed) that have been used to prevent floods
- materials (such as sand, gravel, soil etc.) people have used to prevent floods
- how would each material prevent a flood? Are any of them more effective then the other?

The variables (controlled variables):
o The size of the sandbag
o The amount of water poured through
oThe way the sandbags are stacked
o Shape of the aluminium container
o Size of the container
o Amount of material placed in each sandbag
o The shape of the sandbag
o The time allowed for the water to run through
o The rate at which the water is being poured

Dependent variable:
o The amount of water that escapes past the sandbags.

Independent variable:
o The materials that are placed in the sandbag (sand, woodchip, coarse gravel and soil)