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Energy comes from different sources. What is the most important source of energy for the earth?
Energy can change from one to another. ______________ use the sun’s energy to make food, they change light energy from the Sun to energy that stored in food.
__________ change light energy to electrical energy.
_______________ change stored energy to electrical energy.
Wind turbine change movement energy from the wind to __________.
Electrical fans change electrical energy to _______________.
Heat source can be obtained from friction, burning and electricity but the __________ is the main source of heat.
_______________ is a measure of how hot or cold something is.
Hot objects have have high temperature and cold objects have low temperature. Temperature is commonly measured in _____________.
What instrument do we use to measure temperature?
The boiling point of water is 100 °C, and the freezing point of water is ___________ °C.
Clinical thermometers is used for to measure body temperature. What are the average living human body temperature?
Heat always flow from a hotter to a colder region.
Which pin or thumb tax will be released first? Is it A, B or C?
Fill in the Blank with the Correct Answer
On the diagram shown, it shows that the object heated has a good .