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It's just physical science
Physical Science
Changes
Mixture of Questions
Do you really know?
100
Which material is the best conductor for electricity to flow through? (a) rubber (b) aluminum (c) sand (d) plastic
What is (b)? aluminum
100
A student reads that electromagnets are used in devices such as car motors and toasters. Which one best describes why electromagnets are used instead of bar magnets?

a) electromagnets are permanent magnets b) electromagnets can be turned on and off c) electromagnets last longer than bar magnets d)electromagnets are usually smaller than bar magnets

What is b?
100
The following solid materials are on a table. Which material could a bar magnet separate from from the rest? (a) cookie crumbs (b) iron fillings (c) sand (d) salt
What is iron fillings?
100
What do you call a material that current cannot pass through easily?
What is an insulator?
100
Electric current flows in this kind of circuit.
What is a "closed" circuit?
200
Increasing the electric current flowing through a wire will make an electromagnet: (a) stronger (b) weaker
What is (a)? stronger
200
When a material changes temperature without being heated or cooled, this is evidence of a: (a) physical change (b) a mixture is formed (c) chemical change (d) magic
What is (c)? chemical change
200
This part of a circuit is able to start and stop the flow of electrical current.
What is a switch?
200
What do you call a circuit that has more than one path along which current can travel?
What is a parallel circuit?
200
What happens when water freezes?
The water turns from liquid to solid.
300
Grant was working on a wooden birdhouse. He was trying to change the texture of the wood by sanding it with sandpaper. What type of change was taking place. (a) different substance (b) physical change (c) chemical change (d) no change was taking place
What is (b)? physical change
300
When water is heated, what happens?
The water turns from liguid to gas.
300
Electrons moving from one object to another can cause this.

Hint: It creates a charge.

What is static electricity?
300
Which is an example of a chemical change? (a) mixing vinegar and baking soda (b) dissolving salt in water (c) mixing Kool-aid (d) mixing dirt and water to make mud
What is A?
300
What do you call a material that electric current can pass through easily?
What is a conductor?
400
How can you separate the particles of sand, salt, and water?

Hint: I need the entire step process. (2 steps)

Using a filter, filter the sand from the salt and water. Then let the water evaporate to separate the salt from the water.
400
While working with magnets, Caleb held the south pole of his magnet to the south pole of another magnet. What word describes how the magnets will respond to each other?
What is repel?
400
What do you call the ends of a magnet?
What are poles?
400
If an object carries a negative charge, how will it react to an object that has a positive charge? (a) attract the object (b) repel the object (c) retract and expel the object (d) do nothing to the object
What is A? attract
400
The switch in an electrical circuit has to be 

(a) from Target 

(b) a conductor 

(c) an insulator 

(d) both conductor and insulator

What is (b)? conductor
500
When a liquid freezes this change happens. (a) mixture is made (b) chemical change (c) physical change (d) new substance is formed
What is (c)? physical change
500
They both have two opposite poles.

Hint: Name the two types of magnets

What is a bar magnet and a electromagnet?
500
What would you need to make up a circuit?
What is a battery, wire, and light bulb?
500
Evaporation is an example of this kind of change due to temperature. (a) physical change (b) chemical change (c) magnetic
What is A? physical change
500
An insulator does not allow electric current to flow through it. True or False?
What is true?