Lesson 10- Things needed for science experiment

AGE 11-13

Kim K c

6 years ago

I couldn't find 71% alcohol. What did everyone else use?

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Rachael W c

6 years ago

70% isopropyl rubbing alcohol--Walgreens, Walmart, etc.

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Amanda J c

2 years ago

What are people using for the "saline solution" in Hydrosphere 4: Marine Ecosystems? It calls for 3.5% saline. Is this homemade solution as used before, a contact lense Solution or nasal wash? Any suggestions?

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Angela D c e

2 years ago

3.5% saline is equivalent to ocean water. Here is a good website with directions (you will use the 35 ppm recipe) https://manoa.hawaii.edu/exploringourfluidearth/physical/density-effects/density-temperature-and-salinity/practices-science-making-simulated-seawater

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