Download presentation
Presentation is loading. Please wait.
1
Unit 1 Review
2
What is a control group? You don’t have to have one in every experiment A control group is a group separated from the rest of the experiment The independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternate explanations of the experimental results. Experiments that use control groups are called controlled experiments.
3
Example Experimental Question: “How does the addition of fertilizer to plant soil affect plant growth?” Design Experiment: Test two plants. One receives fertilizer and the other does not. Compare results Which is your control group? = the plant that does not receive the fertilizer
4
Experimental Question: “How does the addition of fertilizer to plant soil affect plant growth?”
Independent variable? Dependent variable? Constants? Hypothesis?
5
Example Experimental Question: “How does the presence of music affect plant growth?” Design Experiment:?? Control group??
6
Experimental Question: “How does the presence of music affect plant growth?”
Independent variable? Dependent variable? Constants? Hypothesis?
7
A study was conducted to test which fertilizer (A,B, or C) is most effective for the growth of St. Augustine’s grass over a 6 week time period. The following data was collected from the study: Numbered Plot of Grass Treatment Applied Average of INITIAL Height of Grass (cm(=) Average of FINAL Height of Grass (cm) 1 Water 2.4 3.0 2 Fertilizer A 4.0 3 Fertilizer B 2.6 4 Fertilizer C 2.9 1.) What is not a constant in this experiment? (factor that is kept the same) 2.) Why did the experimenters include one plot with water treatment? What is this group called? 3.) What is a quantitative measurement? What is quantitatively measured in this experiment?
8
Review
9
Ex: Who is the principal of Glasgow High School?
Ms. Lynch Mr. Hale Mr. Vaught Mrs. Wilson
10
Ex: Who is the principal of Glasgow High School?
Mrs. Lynch Mr. Hale Mr. Vaught Mrs. Wilson
11
1. Which of the following must be written so that it is testable?
Scientific theory Scientific law Hypothesis All of the above
12
1. Which of the following must be written so that it is testable?
Scientific theory Scientific law Hypothesis All of the above
13
2. What should you do if you are working with a 100 mL beaker and you notice a small crack?
A. Keep working, the crack isn’t big enough for liquid to seep through B. Hurry up and finish before the crack gets larger C. Immediately report the crack to the teacher and wait for further instruction D. Borrow a 100mL beaker from the group sitting work next to you
14
2. What should you do if you are working with a 100 mL beaker and you notice a small crack?
A. Keep working, the crack isn’t big enough for liquid to seep through B. Hurry up and finish before the crack gets larger C. Immediately report the crack to the teacher and wait for further instruction D. Borrow a 100mL beaker from the group sitting work next to you
15
3. Which of the following is known as an “educated guess”?
Conclusion Hypothesis A Law A theory
16
3. Which of the following is known as an “educated guess”?
Conclusion Hypothesis A Law A theory
17
4. Which direction should a test tube be facing when heating over an open flame?
Slightly tilted pointing towards you Slightly tilted pointing away from you Perfectly in the upright position It doesn’t matter
18
4. Which direction should a test tube be facing when heating over an open flame?
Slightly tilted pointing towards you Slightly tilted pointing away from you Perfectly in the upright position It doesn’t matter
19
5. Define the term “scientific law”
A possible explanation to a scientific question An explanation that has been well tested and unifies a broad range of observations An explanation for why certain things exist that can be tested to determine its accuracy. Generalizes a body of observations, typically math related.
20
5. Define the term “scientific law”
A possible explanation to a scientific question An explanation that has been well tested and unifies a broad range of observations An explanation for why certain things exist that can be tested to determine its accuracy. Generalizes a body of observations, typically math related.
21
6. How are theories developed?
By making observations with the five senses By thinking of one scientific hypothesis Through scientific predictions Through many consistent and supportable tests
22
6. How are theories developed?
By making observations with the five senses By thinking of one scientific hypothesis Through scientific predictions Through many consistent and supportable tests
23
7. Identify the statement below that is an observation
Due to overfishing, extinctions in the ocean are on the rise If a young caterpillar is fed a diet high in milkweed, then predators will avoid it as an adult Gardenia bushes are very fragrant How fast can a cheetah run
24
7. Identify the statement below that is an observation
Due to overfishing, extinctions in the ocean are on the rise If a young caterpillar is fed a diet high in milkweed, then predators will avoid it as an adult Gardenia bushes are very fragrant How fast can a cheetah run
25
8. Which of the following is sometimes called the manipulated variable?
Independent variable Dependent variable Control variable Experimental variable
26
8. Which of the following is sometimes called the manipulated variable?
Independent variable Dependent variable Control variable Experimental variable
27
9. Which of the following is sometimes called the responding variable?
The independent variable The dependent variable The control variable The experimental variable
28
9. Which of the following is sometimes called the responding variable?
The independent variable The dependent variable The control variable The experimental variable
29
10. Which of the following is the group that the experimental group will be tested against?
a. The responding variable b. The experimental group c. The control group d. The constant group
30
10. Which of the following is the group that the experimental group will be tested against?
a. The responding variable b. The experimental group c. The control group d. The constant group
31
11. Kimmy observes goldfish in an outdoor pond
11. Kimmy observes goldfish in an outdoor pond. The goldfish seem to be more active when the weather is warm than when it is cold. She asks herself, “How do temperature changes affect goldfish? Task: Discuss the scenerio with your group and create a hypothesis for Kimmy
32
11. Kimmy observes goldfish in an outdoor pond
11. Kimmy observes goldfish in an outdoor pond. The goldfish seem to be more active when the weather is warm than when it is cold. She asks herself, “How do temperature changes affect goldfish? Possible hypothesis: “If the temperature increases, then goldfish activity will increase.” OR “If temperatures decrease, then goldfish activity will decrease.”
33
12. Which of the following phrases contains quantitative data?
Green leaves surround white flowers Ricky’s football jersey is number 85 Seeds sprout more quickly when it is warm Water evaporates at a rate of 2 mL per minute
34
12. Which of the following phrases contains quantitative data?
Green leaves surround white flowers Ricky’s football jersey is number 85 Seeds sprout more quickly when it is warm Water evaporates at a rate of 2 mL per minute
35
13. What type of information does an MSDS sheet not give you?
a. Chemical structure b. Chemical properties c. Personal safety d. Fair market value
36
13. What type of information does an MSDS sheet not give you?
a. Chemical structure b. Chemical properties c. Personal safety d. Fair market value
37
14. In class Kelly placed her pencil on the triple beam balance
14. In class Kelly placed her pencil on the triple beam balance. What can you infer about this? She wanted to find the volume of the pencil She wanted to find the mass of the pencil She wanted to find the length of the pencil All of the above
38
14. In class Kelly placed her pencil on the triple beam balance
14. In class Kelly placed her pencil on the triple beam balance. What can you infer about this? She wanted to find the volume of the pencil She wanted to find the mass of the pencil She wanted to find the length of the pencil All of the above
39
15. Convert 68°F to Celsius C= (F-32) F=1.8(°C) C = K – K=C
40
15. Convert 68°F to Celsius C= (F-32) F=1.8(°C) C = K – K=C = 20°C
41
16. Convert 18°C to °F C= (F-32) F=1.8(°C) C = K – K=C
42
16. Convert 18°C to °F C= (F-32) F=1.8(°C) C = K – K=C = 64.4°F
43
17. Convert 100K to °C C= (F-32) F=1.8(°C) C = K – K=C
44
17. Convert 100K to °C C= (F-32) F=1.8(°C) C = K – K=C =
45
18. Graduated cylinders are marked in units of
liters meters millimeters milliliters
46
18. Graduated cylinders are marked in units of
liters meters millimeters milliliters
47
19. A runner eats a large pasta dinner the night before a race
19. A runner eats a large pasta dinner the night before a race. In this example, which characteristic of life is the runner using to help her win the race? All living things have cells All living things reproduce and display heredity All living things evolve and adapt All living things obtain and use energy
48
19. A runner eats a large pasta dinner the night before a race
19. A runner eats a large pasta dinner the night before a race. In this example, which characteristic of life is the runner using to help her win the race? All living things have cells All living things reproduce and display heredity All living things evolve and adapt All living things obtain and use energy
49
20. Which of the following is a way that organisms maintain homeostasis?
A damaged skin cell dividing into two newer skin cells A human shivering in the cold weather A crow learning to retrieve a food reward in a lab experiment Finishes in the Galapagos developing different types of beaks
50
20. Which of the following is a way that organisms maintain homeostasis?
A damaged skin cell dividing into two newer skin cells A human shivering in the cold weather A crow learning to retrieve a food reward in a lab experiment Finishes in the Galapagos developing different types of beaks
51
21. Which of the following is not a characteristic of life?
Reproduce and display heredity Respond to stimuli Maintain homeostasis Are multicellular
52
21. Which of the following is not a characteristic of life?
Reproduce and display heredity Respond to stimuli Maintain homeostasis Are multicellular
53
22. According to the graph, what is the height of Plant A at 21 days?
5 cm 9cm 11 cm 11 ft
54
22. According to the graph, what is the height of Plant A at 21 days?
5 cm 9cm 11 cm 11 ft
55
23. Identify the lab equipment below
56
23. Identify the lab equipment below
Wash Bottles
57
24. Identify the lab equipment below
58
24. Identify the lab equipment below
Striker
59
25. Identify the lab equipment below
60
25. Identify the lab equipment below
Micropipette *Can measure liquids less than 1 mL
61
26. What piece of lab equipment would you use to measure 10 g of NaCl?
62
26. What piece of lab equipment would you use to measure 10 g of NaCl?
Balance Triple Beam Balance
Similar presentations
