1. Do Now Test tomorrow! Remember- your ‘What’s In…?’ product is due in class on Wednesday. Open your journal to 10/8 and have textbook ready to help answer questions on whiteboard review

2. Review Journal Check

3. White board Review What property of matter does not change based on location? Mass What is the measurement for the force of gravity on an object? Weight If you travel to a planet with a mass much greater than earth, what happens to your weight? Your weight would increase

4. White board Review When measuring an object to determine its mass, what unit do we use in science? Gram (g) What unit of force is used to describe weight? Newton (N) When measuring the volume of an irregular object, what unit do we use? Milliliters (mL)

5. White board Review What unit do we use to describe the density of a liquid? _______ What unit do we use to describe the density of a solid? _______ What unit do we use to describe mass? ____ What units do we use to describe volume? ______ or _______ g/mL g/cm 3 g mLcm 3

6. White board Review 1. 1 mL is equivalent ___cm 3 1 mL = 1 cm 3 2. What is the process used to measure the volume of an irregularly shaped object? Displacement 3. What tool do we use to measure weight? Spring Scale

7. White board Review You have a piece of pyrite and you want to find it’s density. It’s mass is 40g and its volume is 8mL. What is it’s density? 5 g/cm 3 Now you cut the piece in half. It’s mass is now 20g and it has a volume of 4mL. What is it’s density? 5 g/cm 3 The density of an object ________change depending on how much of it you have. Does not

8. White board Review Which weighs more: a pound of feathers or a pound of gold? They weigh the same! Which is has a greater density: a pound of gold or a half a pound of gold? They have the same density because they are the same substance.

9. White board Review What are the following numbers rounded to the nearest hundredth? 3.141592653 3.14 108.9999997 109

10. White board Review A piece of metal has a volume of 38cm 3 and a mass of 277g. It’s weight is 4lbs. Calculate the density of the metal and identify it based on the information below. Show your work and round to the nearest hundredth! Iron = 7.9 g/cm 3 Tin = 7.3 g/cm 3 Lead = 11.3g/cm 3 Zinc = 7.1 g/cm 3 7.29 g/cm 3 It’s TIN!

11. White board Review The mass of a 250cm 3 block of wood is 200g. What is the density of the wood block? Would it sink or float? Yes, this block would float because it has a density less than the density of water, which is 1g/mL

12. White board Review The mass of 10mL of baby oil is 9.8g. What is the density? (Show all work).98 g/mL The density of water is _____________. 1 g/mL When placed in a bottle, the (baby oil/ water) would be on top and the (baby oil/water) would be on the bottom.

13. White board Review What are common physical properties that you might use to describe something to a friend? Color, shape, size, odor, texture Do physical properties change identity when you measure them? No

14. White board Review Common chemical properties are… flammability and reactivity with substances such as oxygen, water, and acids

15. White board Review A physical change is… a change that affects one or more physical properties of a substance. Examples of physical changes are: Change in size, shape, appearance, and changes in state (freeze/melt/turn to gas)

16. White board Review: Name the 5 pieces of evidence a chemical change has occurred Evidence of a chemical change Production of a gas Formation of a precipitate Production of an odor

17. White board Review: Name the 5 pieces of evidence a chemical change has occurred Evidence of a chemical change Production of a gas Formation of a precipitate Production of an odor

18. Physical vs Chemical Change Examples Physical Changes Chemical Changes Melting Ice Hammering Gold until its flat Tearing paper Cracking an egg Boiling water that turns to steam Burning wood Mixing two substances and a solid is formed Combining substances and the product increases by 5 degrees Bicycle rusting Adding Alka-Seltzer to water Baking a cake

19. White board Review Whether or not a substance catches fire is an example of a ___________ property. Chemical The temperature at which ice changes to water is what type of property? Physical property What is a characteristic property? A property used for identification that is unique to that substance and the same no matter the size of the sample.

20. Whiteboard Review List as many physical properties as you can… Color, odor, shape, size, luster, malleability, solubility, magnetism, density, thermal/electrical conductivity, melting point, hardness, texture You find a box that is 20mm in length, 4cm in height, and 3.7cm in width. What is its volume? 29.6cm 3 The box that you found has a density of 1.76 g/cm 3.What is its mass? 52.10g

21. White board Review: Physical or Chemical Changes? burning sugar Chemical Change Dissolving sugar in water Physical Change digesting food Chemical Change

22. White board Review: Physical or Chemical Change? perfume evaporating on your skin Physical Change Ice melting Physical Change wood rotting Chemical Change

23. Whiteboard Review Define element: Made up of one or more of the same kind of atom that are chemically combined. Define compound: Made up of different kinds of atoms that are chemically combined. Are mixtures chemically combined? No What are the smallest single building blocks of matter? An atom

24. Verbal Review Turn to your shoulder partner and define matter Turn to your face partner and define mass Turn to your shoulder partner and define weight Turn to your face partner and define volume Turn to your shoulder partner and define density