y4 sci

The picture shows a lamp giving off light. What form of energy does the lamp use to produce light?

• Thermal

• Mechanical

• Electrical

• Light

A simple device that opens and closes an electric circuit is called a/an _________.

• Light bulb

• Dry cell

• Switch

• Power source

Which form of energy is produced when a guitar string vibrates?

• Light energy

• Wind energy

• Sound energy

• Electrical energy

Why are metals very useful for making electrical wire?

• Metals do not bend.

• Metals are conductors.

• Metals are light.

• Metals hold much heat.

A complete pathway for the flow of electricity is called a ________

• series

• current

• circuit

• wire

In a fair test you should...

• only change one variable (the independent variable)
• change all the variables 
• change no variables 

Which of these examples are a solid?

• water
• oxygen
• orange juice
• rock

What is this object made of?

• Iron
• Leather
• Rubber
• Glass

Which picture is showing us clay?

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Which object is made of glass?

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