This activity demonstrates how light decreases as water depth increases and encourages students to explore the Science Journal app.
Depth and light helps students investigate the relationship between depth and available light before discussing how this might affect deeper corals. This activity will use the Science Journal app. During this activity you will observe the link between depth and light and consider how coral adapts to environments with lower light levels. This activity uses the Science Journal app which has a range of features which make conducting science experiments engaging and exciting. See Subject Update How to: Use the light sensor on the Science Journal app.
Now you have a container full of water, try stirring in a spoonful of soil and taking a light reading. Repeat five times, taking a reading after each spoonful of soil is added. This will make the water cloudy, or turbid. How does the turbidity effect the light sensor? Turbidity can be problematic for coral, why do you think this is? What could cause increased turbidity in oceans?
Caution should be taken to ensure containers are not too full. To avoid spills, keep containers in the middle of the table and clean up spills straightaway to avoid slips. Great care should be taken when positioning smart phones to ensure they are kept dry.
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