1.Mina will make a simple electric circuit for his project in science. She already bought small light bulb and some batteries but she forgot to buy electric wires. Which of the following material will she use in substitute for electric wire? Note: The electric current must flow from the batteries through the bulb in order for it to light up.


a.
wooden tube


b.
aluminum foil


c.
paper cups


d.
plastic straw

2.Which of the following is not an insulator?


a.
plastic cup


b.
wood


c.
steel bar


d.
paper plate

3.When is a certain material considered as an insulator? If it …


a.
does not allow passer-by to pass through them.


b.
does not allow heat and electricity to pass through it.


c.
allows heat and electricity to pass through it.


d.
allows heat and electricity to flow.

4.The following are insulators except


a.
silver


b.
rubber shoes


c.
toothbrush


d.
socks

5.How do we describe a conductor of electricity? It is a material that…


a.
allows the electrons to move freely.


b.
absorbs electrons that move freely.


c.
has no free electrons that can move freely


d.
has extra free electrons on its surface.


need ko po pls (°-°)
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