Brain TeaserThe smallest unit of any

element is a(n) _________ .

a. compoundb. moleculec. mixtured. atom

d. atom

Brain TeaserWhich of the following is a

physical change?

a. melting ice cubesb. burning paperc. rusting irond. burning gasoline

A. Melting ice cubes

Brain Teaser

Sugar is made from these three substances!How are these substances different?

See Demo to answer the following question!

Appearance, State, Solubility

Brain TeaserDo you think sugar will form if you mix

charcoal, oxygen, and hydrogen?

Answer: NO

?

Brain TeaserWrite the definition of an

element!

There will be a Vocab Quiz today!!!! Start studying after your BT

Brain TeaserWrite the definition of an

element!A substance that can not be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number.

Brain TeaserIf you add oil to water and shake the two

liquids together, you will form a

a. pure substance.b. miscible liquid.c. heterogeneous mixture.d. homogeneous mixture.

c. heterogeneous mixture.

Brain TeaserThere are 6 specific properties

for ALL matter, name them:

1. Color2. Shape3. Odor4. Texture

5. Hardness6. size

Brain TeaserFind the density of the object:

Given: m= 122gv= 2.5 cm3

SHOW ALL YOUR WORK!

a. 130.6 cm3

b. 0.0249 g/cm3

c. 0.02cm3

d. 48.8 g/cm3

d. 48.8 g/cm3

D=m/v

Brain Teaser• A block of wood 3.0cm on each

side has a mass of 27g. What is the density of this block?a. 10.0 g/cm3

b. 1.0 g/cm3

c. 9.0 g/cm3

d. 0.33 g/cm3

b. 1.0 g/cm3

D=m/v

Brain Teaser• The chemical symbol for sulfuric acid is

H2SO4, how many atoms are contained in each molecule of sulfuric acid?

a. 3b. 5c. 6d. 7

d. 7

Brain Teaser• List four properties that can be

used to classify elements…Melting PointBoiling PointDensityReactivity

ColorHardnessMalleabilityThermal ConductivitySolubility

Brain Teaser• Ice floats in water because it is

a. more dense than water.b. less dense than water.c. colder than water.d. warmer than water.

b. Less dense than water

Brain TeaserExplain in your own words

“buoyant force”The upward force exerted on an object immersed in or floating on a fluid

Write your

KNOWNS & UNKNOWNS:

Known: d = m/v unknown: ?

d = _____ units d= m/v

m = _____ units d= #units/#units

v = _____ units d= # units box answerChapter 2 Review pg. 60-62 Q’s & A’s

1-20, 30

Chapter 3 Review pg. 94 Q’s & A’s

1-2, 4, 6, 7, 10

• Turn in Ch. 2 Review• First –Read Lab• 2nd –State Your Hypothesis• 3rd – Begin Your Lab• When completed, clean up

equipment!• Keep lab in folder/binder for class!

• Reminder: TEST• TUESDAY!!!