WHAT ARE SOURCES OF HEAT?
What is heat?
A form of energy.
What instrument do we use to measure temperature?
Thermometer.
What are the states of matter?
Solid, liquid and gas.
What types of materials are there according to their transmission of heat?
Thermal conductors and insulators.
What can we use the heat energy for?
Cooking, being warm, electricity…
What two types of sources of heat are there?
Natural and artificial.
What measure unit do we use to measure temperature?
Degrees Celsius or Fahrenheit.
When do materials change their state?
When we heat them.
What is the main characteristic of thermal conductors?
They conduct heat.
What is the most important source of heat energy?
The Sun.
Say two examples of natural heat sources.
Sun, hot spring, volcano, hot sand, fire…
Where are degrees Fahrenheit used?
In The USA.
What types of changes are there?
Physical and chemical.
What is the main characteristic of thermal insulators?
They don’t get easily.
What do we use solar panels for?
To create electricity using energy from sunlight.
Say two examples of artificial heat sources.
Microwave, iron, hairdryer, oven, lightbulb…
What types of thermometers are there?
Digital and with liquid in them.
What is the melting point?
The temperature at which a material changes from solid to liquid.
Say one example of thermal conductor.
Metal.
Why is solar energy a clean energy?
Because it doesn’t pollute the atmosphere.
What is temperature?
How hot something is.
Say two reasons why it is important to measure temperature.
1 To know the weather. 2 To know if food is in good condition to be eaten. 3 To check our body temperature.
What is the melting point of water?
0ºC.
Say one example of thermal conductor.
Wood, plastic, air, wool…
What is the geothermal energy?
The energy of the heat that comes from inside the Earth.