Electric Force
What is the negatively charged particle in an atom called?
Electron
True or False: Earth is a magnet
True
Name a way electromagnets are used in technology.
MRI machine, scrapyard, electric motor, headphones, etc.
What is a force?
A push or pull
What do we call the force between charged particles or objects?
Name a material that will be attracted to a magnet
Iron, steel, etc.
How could you remove the magnetic field in an electromagnet?
Turn off the electric current
What do you call any permanent change in the DNA of a gene or chromosome?
Mutation
In which direction do electric field lines point?
Where is the magnetic field the strongest on a magnet?
The poles
When is the magnetic field stronger: in a straight wire or a loop of wire?
A loop of wire
What do you call a statement in the following form:
If _____________ then ___________ because _______________
Hypothesis
Insulators: rubber, plastic, wood, glass, etc.
Conductors: copper, iron, steel, other metals, sea water, etc.
What does it mean when magnetic field lines are closer together?
The magnetic field is stronger
Name a way to increase the strength of an electric field in an electromagnet.
Increase the current, increase the number of loops, move the loops closer together
What do we call the force by which every object in the universe attracts every other object?
Name two of the four ways objects can become charged
What causes Earth's magnetic field?
Iron moving in the core
If you put multiple compasses around a straight wire with a strong current, in which direction would they point?
In a circle around the wire
What do you call the process where a cell divides into two new body cells?
Mitosis