Coolit
In physics, heat is energy that is transferred from one substance to another substance because of a difference in
temperature.
What is Heat?
Temperature is a measure of hotness or coldness. If two objects at different temperatures are brought together, energy is
transferred-that is, heat flows-from the hotter object to the colder one. A radiator gives off heat, warming the cooler
air around it. If a person holds an unwrapped chocolate bar, his or her hands transmit heat to the chocolate, eventually
melting it. "Heat" should only be used when energy is transferred between substances..
The temperature of a stove burner is high.
If a cold pot is put on top of it, the burner transfers heat energy to it.
All matter, whether a solid, liquid, or gas, is composed of tiny particles such as molecules and atoms. These particles ar
constantly in motion-traveling, vibrating, or rotating randomly in all directions. One of the many different forms of
energy is the energy something has because of its motion. This type of energy is called kinetic energy. The kinetic energy
of the particles in matter is the basis of temperature and heat.
Temperature is the measurement of how fast, on average, the particles in something are moving. Microwaving a bowl of
soup, for example, raises the temperature of the soup by speeding up the average motion of its molecules. The
molecules in the hot soup are traveling faster overall than they did before the soup was heated. On the other hand, the
molecules in an ice cube are moving more slowly.
Temperature is a measure of movement. It does not depend on the amount of matter being considered. An ice chip am
a brick of ice will have the same temperature if the average speed of their particles is the same, even though the ice E
is much larger than the ice chip.
So, heat is the transfer of energy from a hotter substance to a colder one. Transferring heat to a substance usually ra
its temperature. So, back to the bowl of hot soup. The bowl of hot soup and the room-temperature air surrounding
bowl are at different temperatures. Heat from the bowl of hot soup will transfer to the air around it, raising the
temperature of the air. The movement of the energy from the bowl to the air is heat; the movement of the molecul
the soup is temperature.
PROMPT: How are temperature and heat related to each other?