1. The Tools of Science Chapter 2

2. The Big Question pg 40
What Might A Crab’s Shell Size Tell A Scientist?

3. My Planet Diary: pg 44
Fun Facts

4. Why is a Standard Measurement System Important?

5. Why is a Standard Measurement System Important?
A standard measurement system is important because it allows scientists to compare data and communicate with each other about their results.

6. Why is a Standard Measurement System Important?
The metric system was developed in the 1970s
The metric system is a measurement system based on the number 10
Modern scientists use a version of the metric system called the International System, or SI

7. What are some SI units of measure?

8. What are some SI units of measure?
Length – is the distance from one point to another
A meter is the basic SI unit used for measuring length.
One tool you can use to measure a meter is a metric ruler

9. Length con’d…
For measuring lengths smaller than a meter, you use a centimeter (cm) and millimeter (mm)

10. Mass Mass is a measure of the amount of matter in an object
In SI, the basic unit for measuring mass is the kilograms (kg)

11. Weight

12. Weight
Weight is a measure of the force of gravity acting on an object.
A scale is used to measure weight
Weight is gravity dependent

13. Mass vs. Weight
Although mass and weight are related, they are not the same.
The mass of an object is constant.
The weight of the object is not constant.

14. Volume

15. Volume Volume is the amount of space an object or substance takes up.
In SI common units for measuring the volume of solids include the cubic meter (m³) and the cubic centimeter (cm³). The unit for measuring the volume of liquids or gases is the liter (L)

16. Density
Density is a measure of how much mass is contained in a given volume
The standard SI unit for measuring density is kilograms per cubic meter (kg/m³)

17. Read pgs group work

18. Temperature Temperature is measured using a thermometer.
There are two temp. scales (that are used in science); the Celsius scale and the Kelvin scale.

20. Celsius scale
Water freezes at 0ºC
Water boils at 100ºC

21. Kelvin scale Lowest possible temp is 0 K or absolute zero
There are no negative numbers on this scale
The Kelvin scale is the basis for the SI temperature units, and the kelvin (K) is the SI unit for temperature

22. Ch1 L1
Highlights pg44

23. Chapter 2.2 Math in Science see pgs 55-61 highlights
We will, rather than take notes, partner read, teacher read , and/or student read this section.
Listen to what I tell you to highlight

24. Chapter 2.3 Graphs Lesson 2.3 graphs; see highlights
We will, rather than take notes, partner read, teacher read , and/or student read this section.
Listen to what I tell you to highlight

25. Chapter 2 Lesson 4 (2.4) Using Models
My Planet Diary (Disasters)

26. Why do scientists use models?
Model – is a representation of a simple or complex object or process
Models can be pictures, diagrams, 3D objects, or even written descriptions

27. Why do scientists use models?
Scientists use models to understand things that they cannot observe directly.
Models help scientists to understand processes, such as weather systems.

28. What is a System
A system is a group of parts that work together to perform a function or produce a result.
Input is the material or energy that goes into the system. Process is what happens in the system. Output is the material or energy that comes out of the system.
Feedback is output that changes the system in some way

29. We are done SUN