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CBA 2 Review
Test Description: Review of Forces and Energy
Instructions: Answer all questions to get your test result.
1) A teacher attaches pictures to the dry-erase board using adhesive tape during a sorting activity. The next day, one of the pictures was found on the ground. Which force acted on the picture, causing it to fall?
A
magnetism
B
gravity
C
friction
D
evaporation
2) What form of energy is being used when a person pushes heavy boxes across the floor?
A
sound energy
B
heat energy
C
electrical energy
D
mechanical energy
3) A girl turned the light off and went to bed. She remembered she had accidentally left her glass of ice water on the counter. When she got up the next morning, the ice had melted. What form of energy caused the ice to melt?
A
thermal energy
B
light energy
C
mechanical energy
D
sound energy
4) Which form of energy is demonstrated when a woman pushes a wheelchair?
A
electrical
B
light
C
mechanical
D
thermal
5) Which of the following is the best example of a student using electrical energy?
A
Turning on the light in the classroom
B
Writing down the homework assignment
C
Knocking on the classroom door
D
Using scissors to cut a piece of yarn
6) Which forms of energy from the Sun reach the Earth?
A
light and thermal
B
thermal and electrical
C
mechanical and thermal
D
light and mechanical
7) Which of the following items will best allow energy to flow through an electric circuit?
A
flexible drinking straw
B
glass candy dish
C
retractable metal antenna
D
wooden craft stick
8) Matt and Pam placed boards on the curb to race their identical remote control cars on. Matt's board had a rough surface. Pam's board was smooth. Pam's car won 5 out of 5 races. Pam's car was faster than Matt's because of:
A
tension
B
friction
C
pressure
D
gravity
9) Most household appliances, such as toasters and blenders, must be plugged into a socket to work. Which type of energy provides power for these appliances?
A
electrical
B
sound
C
light
D
mechanical
10) Walkie-talkies and remote-control cars require batteries to work. Which type of energy is used to power these kinds of toys?
A
electrical energy
B
light energy
C
heat energy
D
sound energy
11) Which of the following materials are good conductors of heat, sound, and electricity?
A
rubber and cotton
B
copper and aluminum
C
wood and glass
D
plastic and wood
12) Students wanted to know if the mass of an object would affect how fast it fell. The students needed to accurately measure the height they would drop the object from and the mass of the object. Which two tools did the students use to get this informat
A
beaker and graduated cylinder
B
balance and meter stick
C
tongs and measuring cup
D
graduated cylinder and balance
13) A boy went camping and packed his flashlight. When it got dark, he tried to turn on the flashlight; however, it didn't work. There are several reasons why it would not work. All of the following are reasons the flashlight might not work EXCEPT
A
switch was not turned to ON
B
scratched lens covering the lightbulb
C
broken lightbulb
D
old batteries
14) Students put a small wooden ball on the end of a spring. They dropped the ball and watched it bounce up and down. One student explained that gravity was the only force making the ball move. Which of the following is a weakness of this explanation?
A
the ball sometimes moves upwards
B
the ball fails to tough the floor
C
the ball weighs very little
D
the ball is too small
15) Which of these would be a good insulator of electricity?
A
copper
B
aluminum
C
rubber
D
steel
16) Joshua is making a trivet. A trivet is placed on a table beneath a hot pot. He knows that he must choose something that will NOT allow heat to pass easily from the hot pot to the table. Which material should Joshua use to make the trivet?
A
copper
B
wood
C
silicon
D
aluminum
17) Electricity will flow in an electric circuit only if the circuit-
A
has several batteries
B
produces light energy
C
has the right kind of insulators
D
makes a complete path
18) What object could be placed between the wires of a circuit to complete the circuit?
A
eraser
B
toothpick
C
penny
D
crayon
19) Conductors allow thermal and electrical energy to pass through easily. Insulators prevent the flow of thermal and electrical energy. Which of the following items is a poor conductor and a good insulator?
A
copper
B
silver
C
wood
D
stone
20) All of the following are conductors of electricity EXCEPT-
A
steel fork
B
aluminum nail
C
copper penny
D
rubber band
*select an answer for all questions
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