Name: ______________________________Date: _______________________________

5th Grade Science Study GuideCycles in Nature

Vocabulary to Know: Study Hint: Write out the definitions of these words on index cards (flash cards) or make a vocabulary flip book to help you study! Use the definitions from the science textbook and information in your science binder to help.

Nitrogen cycle condensation surface waterCarbon dioxide-oxygen cycle precipitation percolationWater cycle transpiration water vaporEvaporation ground water fossil fuelNitrates ammonia nitrogen fixation

Things to think about:Study Hint: Write out the answers to each of these questions on notebook paper or on index cards. You can also draw pictures/diagrams on paper, and/or make your own Power Point slides, etc. to help you study. You should also review the study aides that we made in class. These should be in the Ziploc bag in your binder. Be sure to look the information up in the science book and in your science binder so that you study the correct things for the test! (DO NOT just rely on your memory at this point!)

1. Identify and describe the stages of the water cycle—beginning at ANY point in the cycle.

2. Identify and describe the stages of the nitrogen cycle—beginning at ANY point in the cycle.

3. Identify and describe the stages of the carbon dioxide-oxygen cycle—beginning at ANY point in the cycle. (HINT: Focus on what things release carbon into the atmosphere and which organisms help to remove carbon from the atmosphere.)

4. Describe the significance of the water, nitrogen, and carbon dioxide-oxygen cycles. Why is each one important to life on earth?

5. What would happen if we changed some part of the water cycle?EX: What would happen if the air in the upper atmosphere were warmer than water vapor in the air? What would happen to the water cycle in an area where many trees were cut down? Do rain puddles disappear more quickly on a cloudy day or on a clear day? WHY?

6. What would happen if we changed some part of the nitrogen cycle?EX: What would happen to the nitrogen cycle if organisms lived forever? What would happen to the nitrogen cycle if bacteria in the soil was unable to fix nitrogen into ammonia and nitrates?

7. What would happen if we changed some part of the carbon dioxide-oxygen cycle?EX: What would happen to the carbon dioxide-oxygen cycle if we used alternative energy sources such as solar energy more often than fossil fuels? What are some ways that we can help to keep the carbon dioxide- oxygen cycle in balance?

8. What role do plants and animals play in the water cycle?

9. How do chemicals and pesticides get into groundwater supplies? Why is this harmful?

10. What percentage of Earth’s atmosphere is made of nitrogen? What percentage is oxygen? What percentage is other gases, including carbon dioxide?

11. Why is having too much carbon dioxide in our atmosphere a potential hazard?

**IMPORTANT REQUIREMENT!**

STUDENT DECLARATION: I studied for at least 25 minutes every night for this test, using the recommended study hints and other study techniques that I know work well for me. ____________________________________________ (student signature)

PARENT AFFIRMATION: My child studied for at least 25 minutes every night for this test. I affirm that I witnessed this study guide being used to help my child prepare for the science exam.

_____________________________________________(parent/guardian signature)

THIS STU DY GUIDE IS TO BE RETURNED TO SCHOOL ON TEST DAY. IT WILL BE COLLECTED PRIOR TO THE EXAM ADMINISTRATION.

Thank you for your hard work!