Measurement Tools and Safety in Science Measurement Measurement

Measurement, Tools, and Safety in Science

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

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

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

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 4. C 5. B � Answers 2. B 6. D Part 4: 1. A 2. B 4. C 5. B 6. D 3. C

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.

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