Unit 1 Assessment Greenhouse Study Guide
Objective 1: Safe procedures in the laboratory.
1. Kelly is mixing chemicals in the lab to see if she can make them explode. She has really long hair, which keeps falling in her eyes. She is drinking a can of Coke and eating chips. The Bunsen burner is on full-blast, and her notebook is lying near it. She is running from the lab station to the supply table, carrying chemicals back and forth. She sniffs the test tubes to see if anything is happening, and she looks in them as she heats them.
1. Please describe at least four things Kelly is doing that are unsafe in the laboratory.
2. Explain why each of the four things is unsafe.
3. Provide at least one solution to make her safe for each of the four things you mentioned.
Objective 2: Scientific Method
Please define the following terms, using the definitions we created in class:
Theory
Hypothesis
Experimental group
Control group
Constant
Independent Variable-
Dependent Variable
Controlled Experiment
Conclusion
Observation
10. List the steps of the scientific method in order.
11. Please write a prediction for the following problem using the format we learned in class.
Mrs. Cleaver is trying to grow tomatoes in her garden. All of the tomato plants keep wilting, even if she waters them twice a day. She cannot seem to get them to stop wilting!
12. What is the first step of the Scientific Method?
13. Why is it important to repeat an experiment many times?
14. How many independent variables should a well-designed experiment include in its design?
15. Why should a well-designed experiment have a control group?
16. Discuss the differences between the dependent variable and the independent variable.
17. Examine Redi’s famous experiment below:
- What is the independent variable?
- What is the dependent variable?
- What are the constants?
- What is spontaneous generation? How did disproving this theory make scientists at the time think about changing their ideas about living things?
18. Why is it important for experimental results to be repeated?
19. Examine Pasteur’s experiment to the left:
- Did Pasteur’s experiment confirm the result of Redi’s experiment?
Would the results of Pasteur’s experiment have been different if he would have waited 3 years to break the neck of the flask?
Objective 3: Characteristics of Life and STERNGRR
1. Describe the eight characteristics of life, using RAREHOG.
2. Describe the eight processes of STERNGRR.
3. List some observations that could be made to determine whether an object is living or
nonliving.
4. What is metabolism? Which life function(s) (STERNGRR) does metabolism include.
5. What is homeostasis?