Heat Transfer
What is the process called when heat moves through direct contact?
Conduction
What is the definition of electricity?
Presence and/or flow of electric charges
What is the area around a magnet where magnetic forces can be observed?
Magnetic Field
What is created when electricity flows through a wire?
A magnetic field
What is the term for energy transfer that occurs due to temperature difference?
Heat transfer
What type of heat transfer occurs through liquids and gases?
Convection
Define static charge and static discharge
Static charge is a buildup of electric charges. Static discharge is a loss of electric charges.
What type of material is attracted to a magnet?
Ferromagnetic materials (like iron, nickel, or cobalt)
What is the name of an electromagnet that is just a coil of wire with an electric current running through it?
Solenoid
Where is magnetic force strongest on a magnet?
At their poles
What is the primary method of heat transfer from the Sun to Earth?
Radiation
Define what an insulator does.
An insulator prevents the flow of electric current and is a poor conductor of heat and electricity.
How do like poles of magnets behave when brought close together?
Like poles repel each other while opposite poles attract.
How does an electromagnet differ from a permanent magnet?
An electromagnet can be turned on and off and has a variable strength, while a permanent magnet maintains a constant magnetic field.
Name the 3 parts of an electromagnet
Coil of wire, an iron core, and a power source (battery)
Name a material that is a good conductor of heat
Any metal
Explain what happens when an object is charged by conduction
An charged object touches and uncharged object. The uncharged object then becomes charged.
What direction does a compass always point? Why?
North because Earth’s South Magnetic Pole is facing upwards and opposites attract
What electromagnet transforms mechanical energy to electrical energy?
Generator
List the 3 types of charging that can occur on an object.
Charging by conduction, Charging by induction, charging by friction
Describe how heat transfer occurs in a convection current.
Heat transfer occurs through the movement of fluids (liquids or gases) due to differences in temperature, creating currents.
Explain what happens when an object is charged by induction
An charged object gets close to an uncharged object without touching it. The uncharged object becomes charged
Explain how you can increase the strength of an electromagnet.
Increase the number of coils, increase the size of the iron core, turn up the electric current.
Name the 3 ways to decrease the strength of an electromagnet.
Decrease the number of coils, decrease size of iron core, turn the electric current off.
What is it called in heat transfer when temperature is the same for two objects?
Equilibrium