1. Skills Unit Review
Speed Dating!

2. Find YOUR ideal Lab Partner!! Have Notebook with you
Scientific Method
Controlled Experiments
Variables
Constants
Control Groups
Interpreting Data
Metric System
Scientific Notation
Measurements

3. Students on the outside
Rotate to your LEFT
Students on the outside
Students on the inside

4. 1. Scientific Method
Students want to test if guinea pigs grow larger if kept in warmer cages. They decided to measure the temperature of the cages in Celsius and the size of the guinea pigs in grams. During the experiment, they fed the guinea pigs the same type and amount of food each day, housed the pigs in the same types of cages with the same type of exercise equipment and shelter, and gave the pigs the same amount of water. The students measured the size of the guinea pigs each day in the evening for thirty days. a. What is the Independent Variable? b. What is the Dependent Variable?

5. 2. Scientific Method
Students want to test if guinea pigs grow larger if kept in warmer cages. They decided to measure the temperature of the cages in Celsius and the size of the guinea pigs in grams. During the experiment, they fed the guinea pigs the same type and amount of food each day, housed the pigs in the same types of cages with the same type of exercise equipment and shelter, and gave the pigs the same amount of water. The students measured the size of the guinea pigs each day in the evening for thirty days. What are 5 constants the students controlled during the experiment? (There are more than 5 if your imagination is working hard!)

6. 3. Scientific Method
Students want to test if guinea pigs grow larger if kept in warmer cages. They decided to measure the temperature of the cages in Celsius and the size of the guinea pigs in grams. During the experiment, they fed the guinea pigs the same type and amount of food each day, housed the pigs in the same types of cages with the same type of exercise equipment and shelter, and gave the pigs the same amount of water. The students measured the size of the guinea pigs each day in the evening for thirty days. Write a hypothesis for this experiment. (If… then… because… )

7. 4. Interpreting Data
Some business savvy kids set up a lemonade stand on their corner and tracked their sales according to the temperature outside. The data they collected is shown on the right.
What temperature resulted in the best sales?
If the temperature outside were 50 degrees F, predict what how much money they could make in sales?
Predict how much they could make if the temperature were 78 degrees F.
NOT on Test: See if you can find 1 or more problems with the graph

8. 5. Interpreting Data
Students conducted an experiment to test how the acidity of soil affects plant growth. The students measured the acidity by taking the pH of the soil and they measured the height of the plants in cm. The results they collected are shown on the right.
What pH resulted in the tallest plants?
If the pH rose to 7.4, how tall would you expect those plants to grow?
How tall would you expect the plants to grow if the pH were 6.5?

9. 6. Scientific Notation A x 10B
Explain how to write a number in scientific notation to your partner (explain the parts of the formula A x 10B).
Write the following numbers in scientific notation:
0.0006
340
6.7

10. 7. Scientific Notation A x 10B
Explain why the following number is NOT in scientific notation: 44.4 x 104
Write the following number in Standard Notation (the long way):
2 x 103
5.6 x 10-3
8.001 x 100
4. 91 x 107

11. Convert the following metric measurements:
8. Metric System
Before you begin, pretend like your partner has never seen the metric ladder before. Teach them how to use it. Be specific and clear in your instructions.
Convert the following metric measurements:
35.7 mL = ______ L
2000 hg = ______ mg
50 dam = ______ mm

12. Convert the following metric measurements:
9. Metric System
Before you begin, pretend like your partner has never seen the metric ladder before. Teach them how to use it. Be specific and clear in your instructions.
Convert the following metric measurements:
0.03 kilometers = _______ meters
3.401 grams = _______centigrams
88.8 L = ______ kiloliters

13. 10. Measurements
Measure the volume of the liquid in the graduated cylinder.
Measure the length of the arrow.
What metric UNITS would you use to measure something’s mass, length, and volume?
* Don’t forget to estimate to one digit smaller than the smallest division!*

14. 11. Measurements Practical
Determine the volume of the rubber stopper.
Record all measurements that get you to the answer.

15. 12. Measurements Practical
Find the mass of the following objects:
Eraser
Paper clip
10 marbles
100 mL of water

16. 13. Measurements Practical
Find the Density of water D = m / v Record all measurements that lead you to the answer

17. 14.Notebook Check Get your notebook in order
Use the table of contents to be sure you have everything
Gather any missing papers from file box
Rate yourself on the Following from (3- I Know it 2 – I kind of know it I have no idea)
Metric Conversions
Scientific Notation
Variable Identification
Writing a Hypothesis

18. 15. Vocabulary Independent Variable Dependent Variable Observation
A. Use of the 5 senses to examine characteristics of something
B. Variable that is controlled and remains the same throughout the course of an experiment
C. The variable being tested in an experiment. The one you purposefully change.
D. A testable explanation that leads to further investigation.
E. The variable that is measured in an experiment and changes as a result of changes to the Independent Variable.
Independent Variable
Dependent Variable
Observation
Hypothesis
Constants

19. Independent Variable
Dependant Variable
Observation
Hypothesis
Constants