1. Measurement, Tools, and Safety in Science

2. Measurement
Measurement is a description of an object using numbers and units
Units in the US (for example: inches, gallons, and Fahrenheit) are different from units used by scientists
Scientists use the metric system also known as the International System of Units (SI for short)
The SI system is used by scientists for consistency

3. What are some units used in the SI System?
Degrees Celsius or Kelvin
Meters
Liters
Grams
Complete Part 1 on your worksheet now.
Answers: 1. C 2. B 3. D 4. A

4. Tools In order for scientists to perform measurements we use tools.
What are some tools used by scientists for measurement?
Rulers
Balances
Graduated cylinders
Beakers
Thermometers
Droppers
Complete Part 2 on your worksheet now
Answers: 1. D 2. E 3. C 4. A 5. B 6. F

5. Each measurement tools measures different values and uses different units for the measurement
Complete Parts 3 and 4 on your worksheet now
Answers Part 3: 1. A 2. B 3. C 4. C 5. B 6. D
Answers Part 4: 1. A 2. B 3.C 4. C 5. B 6. D

6. While performing experiments it is important to be safe
Some important things to note:
During labs it is important to listen and follow all directions both verbal and written
There should be no fooling around when lab equipment is involved
The safety contract must be followed at all times AND must be signed before you will be allowed to complete any lab experiments tomorrow.
Let’s go over the safety contract now.

7. Safety Rules Please complete Part 5 of your handout now. Answers:
1a. Carry the microscope from underneath and on the neck.
1b. Do not eat using laboratory equipment and do not eat in the lab
1c. Wear safety gear, keep lab area clear, point test tube away from students.
Part 6 is your HW tonight.