Quality of materials

Which of these materials are natural?

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Which of these materials are human-made?

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What attributes has this material?

• shiny, synthetic, metallic

• Soft, plastic, synthetic

• natural, hard, flexible

• sharp, small, plastic

What are some sources of electrical energy?

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Most electricity flows through metal wires.

• True

• False

It Is the ability of electricity to flow through a material

• Electrical conductivity

• Flexibility

• Semiconductor

• Ductility

It is the ability to bend

• Electrical conductivity

• Flexibility

• Semiconductor

• Ductility

It has a medium level of electrical conductivity.

• Wooden log

• Flexibility

• Semiconductor

• Ductility

Hardness means that the material breaks easily

• True

• False

A wooden toy car has a high electrical conductivity

• True

• False