1. What is matter?
Matter is the “stuff” all around us. It is anything that has mass and takes up space.
We will study the properties of matter and the changes that matter undergoes by performing experiments.

2. Homework for tonight… Please get your your school supplies.
3 Ring Binder and filler paper Scientific Calculator Highlighters Pens and pencils

3. Are all these numbers the same???
Do Now
Who is your tallest teacher?
Who is your shortest teacher?
Estimate their heights.
2. A scientist measures a rectangular piece of metal. The width is 5.00 cm and the height is 2.00 cm. How should the scientist report the area of the rectangle?
a) cm2 b) 10.0 cm2 c) 10. cm d) 10 cm2
Are all these numbers the same???

4. In your group
Measure the length and width of your white board using the Plonkit and calculate the area. Share this value on the board.
You all used the same measuring device…
Now, repeat the activity with Plonkit 2.0
Plonkit ->

5. Practice measuring by taking
Meaningful Measurements A.
B. mm
C D E. mL mL C

6. DO NOW: What are the three states of matter? Compare them.
Compare physical and chemical changes. What are examples of each?
What are examples of physical properties?

7. SOLID GAS
LIQUID

8. Physical Change Physical Properties
Alters a given material without changing its composition
What are some examples???
Physical Properties
Observed without changing the substance’s composition
Examples:

9. Can physical properties be used to identify a substance?
Which liquid has the highest boiling point?
Which property can be used to distinguish neon from chlorine? neon form oxygen?
A yellow solid is discovered. The solid was put in an oven that reached a maximum temperature of 450oC. When the oven was opened, the material was still solid. Identify it!

10. In our lab, we will identify a liquid using its physical properties – specifically density. We will also practice taking meaningful measurements so remember to use all the digits on the scale plus one estimated digit. What is density?
Go over their responses on board
Do density lab

11. Which plastics would be the most difficult to separate? Why?
When plastics are recycled it is particularly important that they are separated by type. The numbers on recyclable plastics help this process along, but on a large scale it is inefficient to hand sort the items. Instead materials are separated by density.
Answer these questions in your group on the white board. Provide a reason for each. Write your names on the white board so we can assess your responses.
Which plastics would float on water? Which would sink? How do you know?
Which plastics would be the most difficult to separate? Why?
Which liquid, from our investigation yesterday, could be used to separate the Polyvinylchloride from Polystyrene? How would it work?
Can the alcohol be used to separate HDPE from PETE? Explain your choice.
Plastic
Density (g/mL)
PETE- Polyethylene Terephthalate
1.31
HDPE High-density Polyethylene
0.96
Poly Vinyl chloride
1.4
LDPE Low-density
Polyethylene
0.88
PP Polypropylene
0.86
PS Polystyrene
1.05

12. Chemical Changes A new substance is formed
What is evidence that a chemical change has occurred?

13. Are units important? Do we have a way to convert from one unit of measure to another?

14. How many water molecules are in this glass
How many water molecules are in this glass? How would you go about solving this problem???
Brainstorm and TELL me what you would do. Could you show CLEARLY, LABELED WORK that a PEER CAN FOLLOW to demonstrate your solution?

15. We are going to learn a pattern that we can use to solve any conversion problem – no matter how easy or complicated – in science, business, math.

16. You are following a recipe on the cooking channel prepared by a British chef. The recipe requires 1.25 L of apple cider. The only volume measuring equipment you have is in cups. You go online and find that:
1 L = cup (US)
How many cups do you need?
1. CIRCLE your given -> this goes on the left side of your paper
2. UNDERLINE what you are trying to find -> this goes on the right side of your paper
3. Set up conversion factors to go from one unit to the next.
4. When all the units work out, solve.

17. Now let’s try another.
Measure your pencil in inches.

18. What is energy? What is temperature?
Write out on your white boards. (One on each) Now share.

19. How can we tell if a process is exothermic or endothermic?
Discuss with your neighbor

20. Which requires more energy in order for its temperature to change?

21. Specific heat capacity -
q = m c DT
Specific heat capacity -
the amount of heat needed to raise the temperature of 1 gram of substance by 1ºC

22. Compare the specific heats of
Copper
Water
= J/gºC
= 4.18 J/gºC

23. To help us understand heat, imagine the hot coffee in this mug

24. Endothermic Process System Surroundings System absorbs energy
from the surrounding
Heat goes into the system
The energy of the system
increases
Energy
Surroundings

25. Exothermic Process System Surroundings System releases energy
to the surrounding
Heat goes out of the system
The energy of the system
decreases
Energy
Surroundings