Physical/Chemical
What is a physical change?
It is a change that makes an object change its appearance,color,or size
What does DC stand for?
Direct current
What is the aurora borealis called in the southern hemisphere?
aurora austrialis
Is a rusted nail a chemical change or physical?
It is a chemical change because it wont change back into a regular nail.
What are the parts of a compass?
The parts are a magnetized needle, and a flat space to let the needle pivot.
What is a chemical change?
It is a change that is completely permanent?
What does AC stand for?
It stands for Alternating current.
What would you detect if you scattered iron fillings on a piece of paper with a magnet under the paper?
the magnetic fields
How is cutting wood a physical change?
It is a physical change because it is still wood even after it has been cut.
If you cut a magnet in half will it have one pole and why?
No because if you cut a magnet half it will still have 2 poles
Is a fish decomposing on the side of the lake a phyical or a chemical change?
a chemical change
Who made people start using D.C. current?
Thomas Edison
When you hang a magnet,so it is free to swing and turn,what have you created?
a compass
true or false?Was the concept of electric fields first introduced by Thomas Edison?
False (Michael Faraday)
What are the parts to make an electromagnet?
A battery,copper wire,nail,paper clips
When you eat food is it a physical or chemical change?
Chemical change
Who invented A.C. current?
Nikola Tesla
What is magnetism a type of?
electricity
force
gravity
matter
force
How do you magnetize a needle?
The needle is rubbed on a magnet to make it magnetized.
How do you find out which pole is which on an unmarked magnet?
You test it by using another magnet
Is breaking a plate a physical or a chemical change?
Physical change
What device do you use to measure electrical current?
Ammeter
Which one of these items would NOT attract to a magnet?
coins/paper clips/i phones/audio speakers
coins
When someone shocks you,what electricity is it?
Static electricity
What units is electrical resistance typically measured in?
Ohms