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Earth's magnetic field and bar magnets both attract particles to the same location. Where are they?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
What happens when two north poles of magnets are placed together?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
What characteristics do magnetic substances have? They
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
What must happen for an electromagnet to have a magnetic field?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
The fact that a compass needle is designed to always point north tells us what?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
What is our best evidence that Earth has a magnetic field?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
What substance is attracted to a magnet?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
A circuit, coiled wire around an iron rod, and a switch are components of which of the following?
a compass needle lines up with it
Earth is surrounded by a magnetic field
they repel
iron
the North and South poles
an electromagnet
can push or pull objects they are not touching
It must be connected to an electrical source
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