1. Ocean Density Three Investigations

2. Investigation 1 – Which is denser: fresh water or salt water? Read the question carefully. – What is the independent variable? – What is the dependent variable? – What are some controlled variables?

3. Investigation 1 – Which is denser: fresh water or salt water? Write a hypothesis – If the independent variable changes (how does it change?) – Then the dependent variable changes (how does it change?)

4. Investigation 1 – Which is denser: fresh water or salt water? You have these materials to work with – Triple beam balance – Beaker – Plastic cup – Pipette – Graduated cylinder – Spoon – Salt

5. Investigation 1 – Which is denser: fresh water or salt water? Write a procedure – What do you need to do first? – What are you testing? – How are you testing it? – What are you measuring? – How are you measuring it? – How many times are you repeating the test? – What calculations do you need?

6. Investigation 1 – Which is denser: fresh water or salt water? Make a chart – What needs to be in your chart? – Where do you put the independent variable? – How do you show the number of trials? – How are you going to title the chart?

7. Investigation 1 – Which is denser: fresh water or salt water? Conduct your investigation Collect your data

8. Investigation 1 – Which is denser: fresh water or salt water? Make a graph – What are you going to put on the X-axis? – How will you label the X-axis? – What are you going to put on the Y-axis? – How will you label the Y-axis? – What kind of scale do you need? – What is an appropriate title for your graph?

9. Investigation 1 – Which is denser: fresh water or salt water? Write a conclusion – Answer the research question – which water was densest? – Do you accept or reject your hypothesis? – Why? Explain your data. – Where might errors have been made?

10. Investigation 2 – How does the amount of salt in water affect density? Read the question carefully. – What is the independent variable? – What is the dependent variable? – What are some controlled variables?

11. Investigation 2 – How does the amount of salt in water affect density? Write a hypothesis – If the independent variable changes – Then the dependent variable changes

12. You have these materials to work with – Triple beam balance – Beaker – Plastic cup – Pipette – Graduated cylinder – Spoon – Salt Investigation 2 – How does the amount of salt in water affect density?

13. Write a procedure – What do you need to do first? – What are you testing? – How are you testing it? – What are you measuring? – How are you measuring it? – How many times are you repeating the test? – What calculations do you need? Investigation 2 – How does the amount of salt in water affect density?

14. Make a chart – What needs to be in your chart? Investigation 2 – How does the amount of salt in water affect density?

15. Conduct your investigation Collect your data Investigation 2 – How does the amount of salt in water affect density?

16. Make a graph – What are you going to put on the X-axis? – What are you going to put on the Y-axis? – What kind of scale do you need? – What is an appropriate title for your graph? Investigation 2 – How does the amount of salt in water affect density?

17. Write a conclusion – Answer the research question – Explain your data – Where might errors have been made? Investigation 2 – How does the amount of salt in water affect density?

18. Investigation 3 – How does the temperature of saltwater affect density? Read the question carefully. – What is the independent variable? – What is the dependent variable? – What are some controlled variables?

19. Write a hypothesis – If the independent variable …...Then the dependent variable changes…… Investigation 3 – How does the temperature of saltwater affect density?

20. You have these materials to work with – Triple beam balance – Beaker – Plastic cup – Pipette – Graduated cylinder – Spoon – Salt Investigation 3 – How does the temperature of saltwater affect density?

21. Write a procedure – What are you testing? – How are you testing it? Investigation 3 – How does the temperature of saltwater affect density?

22. Make a chart – What needs to be in your chart? Investigation 3 – How does the temperature of saltwater affect density?

23. Conduct your investigation Collect your data Investigation 3 – How does the temperature of saltwater affect density?

24. Make a graph Investigation 3 – How does the temperature of saltwater affect density?

25. Write a conclusion Investigation 3 – How does the temperature of saltwater affect density?