Question

Noam is building an aquarium. He needs to install a system to isolate biological matter and keep the water from getting too dirty. The water is continuously fed through the separation system, and the clean filtrate is allowed to flow back into the aquarium. Should he use a screen or a filter? Explain at least one advantage and one disadvantage of each.

Answer 1

Sample Response: If Noam chooses a filter, it might be more effective than a screen. After using it for a while, though, he will have to replace it, which could be expensive. A screen might be less effective, but it can be cleaned instead of replaced.

Answer 2

If Noam chooses a filter, it might be more effective than a screen. After using it for a while, though, he will have to replace it, which could be expensive. A screen might be less effective, but it can be cleaned instead of replaced.