Machines
What are the two types of machines?
Simple and compound machines
Name 3 materials that are insulators.
A generator, receptor, conducting cable and switch together create a(n) _____.
Insulators are usually made of materials like metals.
False- insulators are usually made of materials like plastic, rubber, wood, etc.
Give examples of two compound machines.
Wheel and axle, a pulley, scissors, computer, washing machine, etc.
Name two examples of conductors.
Water and metals
What material do magnets and the items they're attracted to need to be made of?
They need to be made of metal.
A bike is a simple machine.
False- A bike is a compound machine.
Give examples of two simple machines.
A lever, a wedge, a screw, inclined plane, etc.
Which one allows (permite) electricity to flow? Conductors or insulators?
Conductors permit electricity to flow.
How many poles does a magnet have? What are the names of the poles?
2 poles, the north and South Pole.
Wires are made of plastic.
False- wires are made of metal.
What type of energy does an oven use and what type of energy does it convert it to?
It uses electric energy and converts it to thermal energy to cook the food.
What are the four parts of an electric circuit?
Receptor, generator, cables, and the switch
How does an electric current work?
The battery provides the electric energy and the electricity runs through the cables until it arrives at the receptor (the lightbulb for example).
The earth is like a magnet.
True.