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9th Science Test 7

Across
A simple device that uses the laws of electrostatics to detect small electric charges
What is the SI unit of resistance
Material through which current does not easily flow
The law that relates current, voltage, and resistance
What are the two belts of charged particles located above the Earth's equator that protect Earth from the solar wind
A substance that has no unpaired electrons and is slightly repelled by either pole of a magnet is a ? substance
What term describes a substance that has several unpaired electrons per atom and is strongly attracted to magnets
A material whose domains strongly resist changes in the direction of its magnetic field is described as magnetically ?
What is an object capable of attracting materials by a magnetic force
Down
Material through which current flows easily
What are used to indicate the direction and strength of a magnetic field
A circuit that contains a complete path for electrons to flow through is a ? circuit
What is the imaginary line that circles the Earth halfway between the two magnetic poles
The Earth's 'north-seeking' pole is called
The extent to which a material can absorb or channel lines of flux
Electrical device designed to hinder current flow
Material that allows current to flow through it with no resistance
What method of magnetism is used when a needle is magnetized by holding a magnet near a needle, magnetizing by ?
What term describes an object with an equal number of positive and negative charges
A device that opens or closes a circuit
The process of diverting unwanted electric charge directly into the earth is