WorksheetsElectricity
Total questions: 25
Worksheet time: 30mins
A group of students hang a balloon with an electrical charge from the ceiling with a string. They bring another balloon near the first one. Predict what will happen when the balloons are brought closer together. The balloon on the string will?
move upward if the charges are opposite.
remain still if the charges are opposite.
move downward if it loses its charge.
move away if the charges are the same.
Which statement supports that electricity can be very dangerous to humans?
It keeps us in contact with others who may live far away.
Inventors need to create something that could be put between humans and the flow of electricity.
Conductors are usually made from wire.
Our bodies are good conductors.
Which of the following occurs due to static electricity?
A steel ball falls vertically to the ground after it is released from a height.
An iron nail moves toward a bar magnet after the two are placed close to each other.
A laboratory cart rolls across the floor after it is pushed by a student.
A plastic comb attracts a small piece of paper after it is used to comb someone's hair.
A student rubbed a balloon with a wool cloth. The balloon developed a negative charge. The student placed the balloon against a wall and let go. The balloon stayed next to the wall for a few minutes, then fell. What is the MOST likely reason the balloon fell?
The balloon gave up positive charges to the wall.
he wall gave up negative charges to the balloon.
The balloon gave up negative charges to the wall.
The wall gave up positive charges to the balloon.
Which material is NOT a good electrical conductor?
wood
water
copper
aluminum
A student is given three identically sized blocks. Each block is made of a different material. What characteristic of the blocks should be examined to find out which block is made of metal?
weight
conductivity
color
texture
