1. What Tools Do Scientists Use?

2. Qualitative vs. Quantitative
Do not involve measurement
Use numbers

3. Dutch eyeglass maker Anton Van Leeuwenhoek

4. Today’s Microscopes

5. Temperature Scales

6. How is Mass different from Weight?
The amount of matter in an object
Measured in grams or kilograms
Use a balance
The measure of the force of gravity’s pull on an object
Measured in newtons
Use a scale

7. On Earth this astronaut weighs 240 lb.
Weighs zero pounds
Weighs 60 pounds

8. Reading a Graduated Cylinder: What is a meniscus?

9. Review 1. What is a qualitative observation?
2. What is a quantitative observation?
3. What is the difference between mass and weight?
4. Name three things you need to do in order to stay safe in a science lab.