حل ورقة عمل Electricity and Magnetism العلوم المتكاملة الصف الثالث
حل ورقة عمل Electricity and Magnetism العلوم المتكاملة الصف الثالث
Answer Key with Questions
Module Test: Electricity and Magnetism
1) Fill in the blanks using the available answer choices.
A north pole will attract another magnet’…………spole
Blank 1 options
• north
• south
Correct Answer
south
3).A compass uses the ……………….field of the Earth.
Correct Answer
Blank 1: magnetic
4) Static electricity might cause a shock to a person touching which object?
a glass window
a plastic bottle
an iron doorknob
a rubber eraser
Correct Answer
an iron doorknob
6) Which causes a shock when a person touches a doorknob?
- electric current
- static electricity
- a broken circuit
- insulated wires
Answer Key with Questions
Module Test: Electricity and Magnetism
7) Anita lights up the dark room with her flashlight to see what is there. Explain how the electrical circuit in the flashlight works.
Correct Answer
Answers may vary.
Explanation
Answer Key with Questions
Module Test Electricity and Magnetism
8) Your papers keep falling off the refrigerator door. How could you solve this problem?
Design a stronger magnetic holder.
Attach paper clips to a magnet.
Use thicker paper.
Fold the papers in half.
Correct Answer
Design a stronger magnetic holder.
9) Drag and drop the phrases into the correct column.
Ways you can use magnets
Ways magnets do not work
Answer Bank
Collect nails that have fallen on the ground. Hold objects in place
Light up a light bulb Sort items in your desk
Correct Answer
Ways you can use magnets
• Collect nails that have fallen on the ground.
Hold objects in place
Ways magnets do not work
Light up a light bulb
• Sort items in your desk
Correct Answer
attracts
attracts
11) Which statements describe how a magnet can be used to solve a problem? Select all that apply.
A magnetic latch keeps a cabinet door closed.
A person uses a magnet to attach a note to a refrigerator.
A magnetic alphabet letter helps a student read.
A person uses a magnet to steady a wobbly table.
Correct Answer
A magnetic latch keeps a cabinet door closed.
A person uses a magnet to attach a note to a refrigerator.
12) Which would be attracted to a magnet?
an ice cube
O an iron nail
a wax crayon
a copper penny
Correct Answer
an iron nail
13) A positive charge will attract a……….charge.
Correct Answer
Blank 1: negative
14) Maria combs her hair with a plastic comb, causing static electricity to build up on the comb. She then places her comb next to some small scraps of paper. What happens to the paper scraps?
The paper scraps stay in place.
The paper scraps are attracted to the comb.
The paper scraps are repelled by the comb.
The paper scraps are scattered in all directions.
Correct Answer
The paper scraps are attracted to the comb.
15) Describe how the distance that an object is from a magnet affects the magnetic force on that object.
Correct Answer
Answers may vary.
Explanation
16) In which of these situations could a magnet be used to solve the problem? Select all that apply.
Mrs. Lee wants to attach a note to her metal filing cabinet.
Lexie loses her rubber wrist band in the sand at the beach.
Kyle needs to clean up a pile of flour that he spilled while baking.
Halley wants to move her plastic toy car around the race track without using her hands.
Mr. Lopez drops a metal screw under his desk and he cannot reach it or move the desk to get it.
Correct Answer
Mrs. Lee wants to attach a note to her metal filing cabinet.
Mr. Lopez drops a metal screw under his desk and he cannot reach it or move the desk to get it.
17) Which is an example of static electricity in nature?
O rain O volcano
O lightning
O waterfall
Correct Answer
lightning
