2 or more elements is known as what?
A compound
Draw a valance dot diagram for carbon.
•
• C •
•
Match the term to the correct definition
Velocity:
a. The speed and direction an object is moving
b. The change in an objects position with respect to time
c. How fast something is moving
A.
Would a long and skinny wire have more or less resistance?
More
On a scale of 1 to 10, how confident do you feel about your final exam?
10
A 15 g rock is dropped into a graduated cylinder of water. The water rises from 10 mL to 25 mL. What is
the density of the rock?
15 mL
Identify the following bonds as covalent (C) or ionic (I):
a. CaCl2
b. CO2
c. HCl
a. I
b. C
c. C
From whose perspective would the motorcycle be going the fastest?
The car going 15 km/h
What is the kinetic energy of a 15 kg object moving at a velocity of 3 m/s?
67.5 J
One end of a rope is vibrating to produce a wave with a wavelength of 0.5 m. The frequency of the wave is 2 hertz. What is the speed of the wave?
1 m/s
Name the 3 particles that make up an atom and their charges
Neutron: Neutral
Proton: Positive
Electron: Negative
Write the chemical formula for each of the following:
a. Carbon tetrafluoride
b. Iron (II) chloride
c. Zinc oxide
a. CF₄
b. FeCl₂
c. ZnO
Sandra ran 6 m E, 4 m W, 8 m N, and then traveled 10 m S. What was her total displacement?
2.83 SE
A current of 0.5 A flows in a 60 W light bulb when the voltage between the ends of the filament is 120 V.
What is the resistance of the filament?
240 ohms
When a wave bounces off a surface that it cannot pass through it is called what
Reflection
The electrons in the outermost energy level or shell of the electron cloud are known as what?
Valence Electrons
Name the following compounds:
a. H₂O
b. Li₃N
c. FeBr₃ (Fe+3)
a. Dihydrogen oxide
b. Lithium nitride
c. Iron (III) bromide
Eli traveled 4 m West in 5 seconds, then an additional 5 m North in 10 seconds. What is his average speed for the entire trip?
0.6 m/s
What is the mechanical advantage of the following pulley's
A: 1
B: 2
C: 2
D: 3
E: 3
Which has more thermal energy: A cup of super hot coffee or an iceberg?
Iceberg
Isotopes have different _____________________ because they have a different number of _____________.
Mass numbers, Neutrons
Name the 5 types of chemical reactions. I will double your points if you can write out the templates for the first 4.
Synthesis: A + B -> AB
Decomposition: AB -> A + B
Single replacement: AB + C -> AC + B
Double Replacement: AB + CD -> AD + BC
Combustion
An airplane flying through the air would experience what kind of friction?
Fluid Friction
What is the gravitational potential energy of a 200 g object suspended 12 m above the earth’s surface?
23.52 J
Fill in the missing parts of the electromagnetic spectrum and label the arrows: high frequency/high energy and low frequency/low energy.
Radio, Microwaves, Infrared, Visible, UV, X-rays, Gamma.
radio: low
Gamma: High