Brain Teaser
The smallest unit of any
element is a(n) _________ .
d. atom
a. compound
b. molecule
c. mixture
d. atom
Brain Teaser
Which of the following is a
physical change?
A. Melting ice cubes
a. melting ice cubes
b. burning paper
c. rusting iron
d. burning gasoline
Brain
Teaser
See Demo to answer the
following question!
Sugar is made from these three substances!
How are these substances different?
Appearance, State,
Solubility
Brain Teaser
Do you think sugar will form if you
mix charcoal, oxygen, and hydrogen?
Answer: NO
Brain
Teaser
Write the definition of an
element!
There will be a Vocab Quiz today!!!!
Start studying after your BT
Brain
Teaser
Write 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 Teaser
If you add oil to water and shake the two
liquids together, you will form a
c. heterogeneous mixture.
a. pure substance.
b. miscible liquid.
c. heterogeneous mixture.
d. homogeneous mixture.
Brain Teaser
There are 6 specific properties
for ALL matter, name them:
1. Color
2. Shape
3. Odor
4. Texture
5. Hardness
6. size
Brain Teaser
Find the density of the object:
Given: m= 122g
v= 2.5 cm3
SHOW ALL YOUR WORK!
a.
b.
c.
d.
cm3
d. 48.8
130.6
0.0249 g/cm3
0.02cm3
48.8 g/cm3
3
g/cm
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.
b.
c.
d.
g/cm3
10.0
1.0 g/cm3
9.0 g/cm3
0.33 g/cm3
b. 1.0
3
g/cm
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.
b.
c.
d.
3
5
6
7
d. 7
Brain Teaser
• List four properties that can be
used to classify elements…
Melting Point
Boiling Point
Density
Reactivity
Color
Hardness
Malleability
Thermal Conductivity
Solubility
Brain Teaser
• Ice floats in water because it is
b. Less dense than water
a.
b.
c.
d.
more dense than water.
less dense than water.
colder than water.
warmer than water.
Brain
Teaser
Explain 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
d = _____ units
m = _____ units
v = _____ units
unknown: ?
d= m/v
d= #units/#units
d= # units box answer
Chapter 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!!!