Download Test Review CBA 2B

Name: _______________________
Test date: 8th period Tuesday, Dec. 13th
1st, 3rd, 5th Wednesday, Dec. 14th
2nd, 4th, 6th Thursday, Dec. 15th
CBA 2B Review
Energy:
1. Here is a diagram of a roller coaster.
What position has the most potential energy? Position W
What position has the most kinetic energy? Position X
2. Define potential energy energy due to position, condition, or
chemical composition
3. Give an example of potential energy due to
a. Position: The higher off the surface the more possible
energy
b. Condition: The farther you stretch something the more
possible energy
c. Chemical composition: The possible energy released when
mixing chemicals (like vinegar and baking soda)
4. Define kinetic energy energy in motion
5. Kinetic energy due to
a. Mass: more mass = more kinetic energy
b. Speed: more speed = more kinetic energy
6. The Law of Conservation of Energy states: energy cannot be
created or destroyed, it only changes forms
7. Label all the energy transformations
Thermal Energy
8. Define:
a. Conduction: transfer thermal energy by touch
b. Convection: transfer thermal energy by motion of liquid and
gas molecules
c. Radiation: transfer thermal energy through energy waves
9. Examples: Decide whether each is Conduction, Convection or
Radiation.
a. Heat from a light bulb Radiation
b. A hot air balloon rising Convection
c. Cooking eggs in a pan Conduction
d. Burning your tongue on soup Conduction
e. Walking on hot sand Conduction
f. Boiling water Convection
g. Heating a swimming pool Convection
h. Cooking food in a microwave Radiation
i. Roasting marshmallows over a fire Radiation
j. The sun's rays Radiation
k. An ice cube melting on hot pavement Conduction
10.
How does thermal energy affect water molecules?
To change from liquid to gas increase in thermal energy
To change from liquid to solid decrease in thermal energy
11.
What is an insulator? A material that does not transfer
energy well
What is a conductor? A material that transfers energy very
well
Speed
12.
What is the formula to calculate speed? Speed =
distance/time
13.
How is velocity different from speed? Speed =
distance/time; velocity = distance/time + direction
14.
A lion runs 45 m after a gazelle in 5 seconds. What was the
speed of the lion? Speed = 9 m/s
15.
A bus is travelling from Houston to Dallas (384 km) and the
trip takes 4 hours. What is the speed of the bus? Speed = 96
km/hr
16.
A person throws a Frisbee for their dog a distance of 35 m.
The dog runs to catch it in 6 seconds, but it takes 19 seconds for
the dog to get back. What is the dogs average speed?
Total distance = 70 m
Total time = 25 s
Speed = 2.8 m/s
17.
Calculate the speed of a car moving on a freeway.
distance = 40 m time
=5s
18.
speed = 8 m/s
Calculate the speed between letters E and F
distance = 12 km
time = 6 s
19.
speed = 2 km/s
Who won the race with the greatest speed?
Runner D won the race,
he ran 6 m in 3 s