Q1: Write the scientific words in the blanks :
1. Something that is found in nature and is valuable to humans is called ----natural
resources-----------------------------------2. Natural materials of sources of energy that are useful to people and can not be
replaced easily is called --------------------nonrenewable resources------------------------3. Source of energy made from the remains of ancient is called ---------fossil fuel---------4. A fossil fuel found between rock layers is called ----------------coal--------------------5. A fossil fuel can be used to produce electricity is called ---------coal, natural gas and
oil-------------------------------6. A fossil fuel can provide energy for cooking and heating is called ----------natural
gas—
7. An electric fence used to contain cattle works by transmitting energy through a
conductor creating an electric ____current____
8. ____natural gas _____is pumped out of the ground and can be used for cooking and
heating our homes
9. Coal is mainly used to generate___ electricity ______ and has been used to power
steam locomotives.
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Q2: Write the steps of how nonrenewable resources used to produce electrical
energy:
1) Coal contains chemical energy
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2) Burning coal changes chemical energy to thermal energy that heat water.
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3) Changing thermal energy in to mechanical energy using turbine .
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4) Changing the mechanical energy in to electrical energy using generator.
Q3: Write the name of each picture and the function of each one :
---------------------------------Turbine--------------------------
-------------------------------Generator---------------------------------Q4 : Choose the correct answer:
1. A fan is plugged into an extension cord. The extension cord is plugged into a wall
outlet. How does the extension cord help the fan work?
- The extension cord makes the fan more powerful.
- The extension cord makes the fan easier to operate.
- The extension cord transfers sound energy to the fan.
- The extension cord transfers electric currents from the outlet to the fan.
Correct Answer The extension cord transfers electric currents from the outlet to the
fan.
2. A flow of electrical charges is known as _____.
- Resistance
- electrical current
- static electricity
- voltage