7.13_Do Now/ Classwork/Exit Ticket

Do Now: Starting at nitrogen gas (N2), put the steps of the nitrogen cycle in the proper order.

1. Nitrogen gas (N2) is converted into ammonia (NH4+) by nitrogen fixation in plant roots, or by ammonification when decomposers break down dead organic material (plants and animals).
2. Nitrates (NO3-) are absorbed into plants by assimilation and put into the food web. Denitrifying bacteria convert free nitrates (NO3-) in soil to nitrogen gas (N2).
3. Ammonia (NH4+) is converted to nitrate (NO3-) by bacteria doing nitrification.
4. Precipitation puts nitrogen gas (N2) into soil
5. Nitrogen gas (N2) in the atmosphere

Use the article to answer the classwork questions.

Classwork: Play the video. If it doesn't work, refresh the page and try again. Why are the fish opening and closing their mouths like that?

Classwork: Why are the fish dying in the Peconic River?

Classwork: What has caused the problem that you identified in the previous question?

Classwork: What is one solution that the town of Riverhead tried to fix the fish kill?

Classwork: What are three sources of nitrate in the water supply?

Exit Ticket: Describe how Eutrophication can damage ecosystems. In your response, include the following vocabulary words:

Nitrate

Algal Bloom

Dissolved Oxygen

Surface Runoff

Fertilizer

Bonus: How much seaweed does Mr. Divan harvest in an average week? Please put your answer in pounds.