Intro to Biology Review. 1. Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis.

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Presentation transcript:

Intro to Biology Review

1. Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music. Which component is missing from Carmen’s experiment? A. a question B. a hypothesis C. a control group D. a description of the experiment

2. The graph below shows atmospheric carbon dioxide levels since the year Which of the following conclusions can be drawn from this graph? A. Atmospheric carbon dioxide levels are responsible for global temperature change. B. Atmospheric carbon dioxide levels have been rising at about the same rate for the past century. C. Atmospheric carbon dioxide levels have remained the same over the past century. D. Atmospheric carbon dioxide levels have been rising at an increasingly higher rate as the past century has progressed.

3. A scientist performs an experiment to see if acids have an effect on the health of a particular type of plant. Three sets of plants were treated with acidic solutions of known pH while the control set was treated with a solution of neutral pH 7. Which is the best conclusion for this experiment? A. Acid has no effect on the health of this type of plant. B. High acidity is helpful to this type of plant. C. Low acidity is harmful to this type of plant. D. High acidity is harmful to this type of plant.

4. 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 AppliedAverage of INITIAL Height of Grass (cm(=) Average of FINAL Height of Grass (cm) 1Water Fertilizer A Fertilizer B Fertilizer C ) 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?

5. Which of the following must be written so that it is testable? A.Scientific theory B.Scientific law C.Hypothesis D.All of the above

6. 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

7. Which of the following is known as an “educated guess”? A.Conclusion B.Hypothesis C.A Law D.A theory

8. Which direction should a test tube be facing when heating over an open flame? A.Slightly tilted pointing towards you B.Slightly tilted pointing away from you C.Perfectly in the upright position D.It doesn’t matter

9. Define the term “scientific law” a.A possible explanation to a scientific question b.An explanation that has been well tested and unifies a broad range of observations c.An explanation for why certain things exist that can be tested to determine its accuracy. d. Generalizes a body of observations, typically math related.

10. How are theories developed? a.By making observations with the five senses b.By thinking of one scientific hypothesis c.Through scientific predictions d.Through many consistent and supportable tests

11. Which of the following is sometimes called the manipulated variable? a.Independent variable b.Dependent variable c.Control variable d.Experimental variable

12. Which of the following is sometimes called the responding variable? a.The independent variable b.The dependent variable c.The control variable d.The experimental variable

13. 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

14. 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

15. According to the graph, what is the height of Plant A at 21 days? a.5 cm b.9cm c.11 cm d.11 ft

16. Identify the lab equipment below

17. Identify the lab equipment below

18. Identify the lab equipment below

19. What piece of lab equipment would you use to measure 10 g of NaCl?

20. A research group has discovered that damselflies, a type of dragonfly, are being infected by a particular type of aquatic protozoan. Both young and adult damselflies are not directly infected by the protozoan but contract the infection from the prey they eat. The graph shows the percentage of adult damselflies infected by protozoans during the summer and early fall. Which of the following conclusions is supported by the graph? A. Infection in embanked ponds increased during the sampling period. B. Protozoans were more common in creek-fed ponds than embanked ponds. C. Protozoans reproduce more quickly in embanked ponds than creek-fed ponds. D. Infection in creed-fed ponds remained constant throughout the sampling period.