5 Questions
What is another name for heat?
thermal energy
In which direction does heat flow?
from high temperature to low temperature
What happens to a substance if heat is added to it?
it becomes hot
What is one effect of heating an object?
it causes expansion
What can heat energy be converted into?
mechanical energy
Study Notes
Heat: A Form of Energy
- Heat, also known as thermal energy, is a form of energy that can be transferred from one object to another.
- Heat always flows from a region of higher temperature to a region of lower temperature.
- When heat is added to a substance, it becomes hot, whereas removing heat from an object makes it cold.
- Heat can be converted into other forms of energy, such as mechanical energy, and vice versa.
Effects of Heat on Matter
- Heat can cause expansion in objects.
- Heat can bring about various changes in matter, including changes observed in Activity 4.1.
- Heat is capable of killing microorganisms, as demonstrated by scientific experiments.
Learn about heat, a form of energy, and how it is transferred, converted, and affects the temperature of substances.
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