1. Lab Safety Scientific Measurement Scientific Method
Re Teach session

2. Lab Safety Before… Read all directions and procedures
Ask the teacher any questions you may have
Put on all safety equipment, tie back long hair, and remove jewelry
During
Tell the teacher immediately if you spill something
No horseplay – Someone could get hurt!
All partners remain in work area
After
Return all supplies to proper area
Wash and dry work space
Wash your hands

3. Scientific Measurement
The basic unit of length is the…
1 cm = mm
Therefore, 18 cm = mm
meter 10
180

4. Practice

5. Practice
6.8 68
3.1 31
2.6 26
5.9 59
5.3 53
10.1
101

6. Graduated Cylinder Reading a graduated cylinder
Put the cylinder on a __________________
Bend _________________to the liquid
Read the bottom of the ____________________________.
Flat surface
Eye level
Meniscus (curve or bubble)

7. Practice

8. Practice
3.2 mL mL mL mL
1.1 mL mL mL mL

9. Triple-beam Balance Place the object on the scale
Move the largest weight until the arm drops below zero, then move it back one notch
Move the top weight until the arm drops below zero, then move it back one notch
Move the smallest weight until the arm balances with zero
Add up all the values – hundreds, tens, and ones
Find the most accurate reading, which may include DECIMALS!!

10. Practice

11. Practice
47.8 g g
52.8 g g

12. The Scientific Method

13. Practice

14. Practice 2 5 3 1 6 4

15. Variables

16. Variables A science experiment has three kinds of variables.
• Independent variable – The factor that changes in an experiment
• Dependent variable – What is being measured in an experiment
• Control variable – The factor that remains constant in an experiment

17. If (IV) then (DV) because….
For each of the following problem statements, identify the IV, DV, and constants. Then write a hypothesis. Remember the following format: If…(IV goes here), Then…(DV goes here), Because… How does studying with music affect student test scores? Independent Variable: __________________________________________ Dependant Variable:­ __________________________________________ Constants: __________________________________________ Hypothesis: If a student studies while listening to music, then their test scores will _____________________ because ________________________ ______________________________________________________________

18. If (IV) then (DV) because….
For each of the following problem statements, identify the IV, DV, and constants. Then write a hypothesis. Remember the following format: If…(IV goes here), Then…(DV goes here), Because… How does studying with music affect student test scores? Independent Variable: Studying while listening to music Dependant Variable:­ The test score Constants: The person studying, the class Hypothesis: If a student studies while listening to music, then their test scores will increase because studying with music helps increase attention, memory, and ability to do problems mentally.

19. Practice
How does use of an organized binder the amount of homework a student turns in? Independent Variable: __________________________________________ Dependant Variable:­ __________________________________________ Constants: __________________________________________ Hypothesis: If ______________________________________________________, then _______________________________________________________________ because ____________________________________________________________ _____________________________________________________________________________.

20. Practice
How does use of an organized binder impact the amount of homework a student turns in? Independent Variable: Organized Binder Dependant Variable:­ Amount of work turned in Constants: The student, the subject Hypothesis: If a student uses an organized binder for classes, then the amount of worked turned in will increase Because the student will have a section for each classes assignments to be placed.