1.
[12,Science,V]
A magnetic field is created by the flowing.
2.
[11,Science,V]
There are _________ types of Electricity
3.
[12,Science,V]
All magnets have _____ poles.
5.
[11,Science,V]
The center of an atom is called.
6.
[11,Science,V]
Electricity was first discovered by.
7.
[13,Science,V]
The unit of measuring forces is
8.
[11,Science,V]
Noen, Hydrogen, Iron are some examples of
11.
[11,Science,V]
The ______ particles are different from each other.
12.
[14,Science,V]
______ is a mixture of many different colors.
13.
[13,Science,V]
There are _________ types of forces
15.
[11,Science,V]
Ozone, Nitrogen, Table Salt are some examples of
16.
[13,Science,V]
A force can stop a ________ object
19.
[12,Science,V]
______ have north and south pole.
20.
[14,Science,V]
The pinhole camera was invented by