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Q 1/23
Score 0
Anthony tapes a piece of string to each of two ping-pong balls. He hangs the balls so that they are close to one another but do not touch. Later, he finds that they have pulled together.
They are now touching. What could explain why the two balls are now touching?
30
They have gained opposite charges.
They have both gained a positive charge.
They have both gained a negative charge.
They have both lost their charges.
Q 2/23
Score 0
Celeste uses a wool cloth to give a balloon a negative charge. What will happen when he
holds the balloon near the wall, and why?
30
The balloon will not stick to the wall because a negatively charged object is repelled
by another negatively charged object.
The balloon will stick to the wall because a negatively charged object is attracted to
another negatively charged object.
The balloon will not stick to the wall because a negatively charged object is repelled
by an uncharged object.
The balloon will stick to the wall because a negatively charged object is attracted to
an uncharged object.
23 questions
Q.
Anthony tapes a piece of string to each of two ping-pong balls. He hangs the balls so that they are close to one another but do not touch. Later, he finds that they have pulled together.
They are now touching. What could explain why the two balls are now touching?
1
30 sec
Q.
Celeste uses a wool cloth to give a balloon a negative charge. What will happen when he
holds the balloon near the wall, and why?
2
30 sec
Q.
Tory wanted to know how positive and negative charges affect balloons. The balloons
are touching and attracted to each other. What are the charges on the balloons?
3
30 sec
Q.
What form of energy cooks food in a solar cooker?
4
30 sec
Q.
To conserve energy or if they don’t have a clothes dryer, some people hang their laundry
outside to air dry. Which of the following is the most optimal day to hang laundry?
5
30 sec
Q.
An electron is the particle most easily removed from an atom.What is the electric charge of a neutral atom from which an electron has been removed?
6
30 sec
Q.
Why do two socks sometimes stick together in a dryer?
7
30 sec
Q.
Which is true about how a charged object interacts with a neutral object?
8
30 sec
Q.
Why does your phone charger have plastic covering the electrical wires?
9
30 sec
Q.
A material that allows an electric current to flow through it is an electrical conductor. A
material through which an electric current cannot flow easily is called an insulator. Which
statement bestdescribes the difference between an insulator and a conductor?
10
30 sec
Q.
An electric clock in a classroom will not run if it is not plugged into an electric outlet. What
does the clock get from the electric current from the outlet?
11
30 sec
Q.
Sam made toast for breakfast by putting a slice of bread into the toaster and turning it
on. Which energy transformation did he use to make a piece of toast?
12
30 sec
Q.
You use energy transformations every day. Which of these is a way that you would use
the transformation of electrical energy to motion energy?
13
30 sec
Q.
An object that has thermal energy can lose some of that energy. Which answer describes
an example of the thermal energy of a material decreasing?
14
30 sec
Q.
What type of energy does a ball sitting on a shelf have?
15
30 sec
Q.
What does a generating station do?
16
30 sec
Q.
What effect of decreasing the number of coils around a nail that is a simple electromagnet do?
17
30 sec
Q.
Does a book that is on the fourth shelf from the bottom have the same total sum of kinetic and potential energy as a book that is on the second shelf from the bottom?
18
30 sec
Q.
If you push down a spring scale and then release it, which types of energy does it have?
19
30 sec
Q.
The ability to cause changes in matter.
20
30 sec
Q.
Energy that an object has because of its position or its condition.
21
30 sec
Q.
The energy an object has because of motion.
22
30 sec
Q.
The total energy of motion and position of and position of an object.
