1. Welcome! The Topic For Today Is…

2. Your Topic Scientific Method General VariablesControl GroupsGraphing 200 400 600 800 1000 Bonus Question: 5000 pts

3. Scientific Method General: 200 Question: A hypothesis should be written in which kind of statement Answer If________ then_____________

4. Scientific Method General: 400 Question: In a lab write up, the portion explaining the experiment (testing the hypothesis) should include…. Answer Materials and Procedure

5. Scientific Method General: 600 Question: A conclusion should include a discussion about what? Answer Support or Reject your hypothesis and why

6. Scientific Method General: 800 Question: Based on experimental results, a biologist in a laboratory reports a new discovery. If the experimental results are valid, biologists in other laboratories should be able to …. Answer Perform the same experiment and obtain the same results

7. Scientific Method General: 1000 Question: One yellow geranium plant is planted in my garden in an area of full sunlight and one plant is planted in a partially shaded area. After 10 days the full sunlight geranium has turned brown and the shaded geranium remains yellow. Based on this data what can you conclude? Answer Geranium grow best in shaded areas or with partial sunlight.

8. Variables: 200 Question: What is a variable? Answer The thing that changes

9. Variables: 400 Question: What is a dependent variable? Answer The measurement that depends on the independent variable

10. Variables: 600 Question: How many independent variables can you test at one time? Answer Only one (All other factors must stay constant)

11. Variables: 800 Question: 4 plants are given different amounts of water ( 1mL, 2mL,4mL,and 6mL) each day for 10 days. At the end of 10 days the student measures the height of the plant to determine which amount is best for plant growth. What is the dependent variable? Answer Plant height

12. Variables: 1000 Question: 4 plants are given different amounts of water ( 1mL, 2mL,4mL,and 6mL) each day for 10 days. At the end of 10 days the student measures the height of the plant to determine which amount is best for plant growth. What are three things that must remain the same for each plant? Answer Soil, sunlight, temperature, size of pot, etc.

13. Control Groups: 200 Question: In an early trial of the salk vaccine for polio, 1,830,000 school children participated. This original trial was an attempt to determine whether the Salk vaccine was effective in preventing polio. Of the 1,830,000 children involved only 440,000 received the vaccine. The remainder were not given the vaccine because they…. Answer Served as a control

14. Control Groups: 400 Question: Why do scientists need a control group? Answer For comparison to the experimental group

15. Control Groups: 600 Question: A controlled experiment allows the scientist to isolate and test how many variables Answer One single variable (one type of experimental group)

16. Control Groups: 800 Question: A student placed 5 plants of equal size in five environmental chambers. Growing conditions were the same for each plant except that each chamber was illuminated by a different color of light of the same intensity. At the end of 20 days, plant growth was measured. What control should be used in this experiment? Answer Sunlight or no light

17. Control Groups: 1000 Question: If the experimental group studied for stress consisted of truck drivers who drove daily for 8 hours in very heavy traffic, a corresponding control group would most likely consist of truck drivers who drove… Answer Daily for 8 hours in light traffic

18. Graphing: 200 Question: Which axis does the independent variable go? Answer X-axis (bottom)

19. Graphing: 400 Question: How is the title for a graph properly written Answer The effect of ________ on _________.

20. Graphing: 600 Question: Which graphed line best Best represents this data? Answer #3

21. Graphing: 800 Question: If a data for the independent variable has a range of 50 and 10 boxed along the x axis what interval would you increase by for each box Answer 50/10 = 5 units per box

22. Graphing: 1000 Question: If the data for a dependent variable had a range of 140 and there were 20 boxes, which axis would you use and what would your scale be? Answer Y-axis. 140/20 = 7 units per box

23. Bonus Question: 5000 pts. Question: The table shows data collected on the pH level of an Adirondack lake from 1980 to 1996. Year pH Level 1980 6.7 1984 6.3 1986 6.4 1988 6.2 1990 5.9 1992 5.6 1994 5.4 1996 5.1 11. Label the axes. [1] 12. Mark an appropriate scale on the X axis and y-axis. [1] 13. Plot the data from the data table. Surround each point with a small circle and connect the points. [1] Answer …

24. The Winner Of The Last Round Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!

25. The Winner Of The Last Round Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!