Measuring Temperature
TRUE OR FALSE:
Estimating temperatures with your eyes or skin is always safe and reliable.
FALSE
Estimating temperatures with your eyes or skin is NOT always safe or reliable.
Define energy source.
energy source: an object or material that can transfer its energy to other objects.
(ex: light bulb)
Liquid to Gas is ___________.
Liquid to Gas is evaporation.
Define energy.
Energy: a measure of something's ability to do work- in other words, to cause changes.
Who invented the Celsius scale (° C)?
Anders Celsius invented the Celsius scale.
Poor conductors are known as _______________.
Poor conductors are known as heat insulators.
What are the boiling and melting points of water (°C)?
Boiling point: 100°C
Melting point: 0°C
Temperature indicates the _______ _____ of particle motion in a substance.
Temperature indicates the average speed of particle motion in a substance.
What was named in William Thomson's honour?
The Kelvin scale was named in honour of William Thomson. He was given the title "Lord Kelvin."
What are the three ways in which energy can be transferred?
The three ways in which energy can be transferred are radiation, conduction, and convection.
Name a change of state in which particles become
(a) more organized
(b) less organized
(c) able to move more freely
(a) solids
(b) liquids
(c) gases
FILL IN THE BLANKS:
Energy is not a ________. It cannot be weighed. It does not take up _____. Energy describes a quality or condition.
Energy is not a substance. It cannot be weighed. It does not take up space. Energy describes a quality or condition.
Who created the air thermometer?
It was Galileo, an Italian scientist, who created the air thermometer.
In __________, the warm fluid, itself, moves from place to place, carrying the thermal energy with it.
In convection, the warm fluid, itself, moves from place to place, carrying the thermal energy with it.
Define evaporative cooling.
Evaporative cooling: a process in which the faster-moving particles on the surface of a liquid evaporate and escape into the air; the slower-moving particles, which are left behind, have lower kinetic energy, decreasing the temperature of the remaining liquid and the surface on which it is resting.
What are the four important ideas of the particle model of matter?
• All substances are made of tiny particles too small to be seen.
• The particles are always in motion — vibrating, rotating, and (in liquids and gases) moving from place to place.
• The particles have spaces between them.
• The motion of the particles increases when the temperature increases. The motion of the particles decreases when the temperature decreases.
FILL IN THE BLANK:
At the top of Mount Everest, water would boil at only ___.
At the top of Mount Everest, water would boil at only 69°C.
What are the 5 features of the energy transfer system (in order)?
1. Energy Source
2. Direction of Energy Transfer
3. Transformations
4. Waste Heat
5. Control Systems
Is there a temperature to turn helium into a solid? If so, what is it?
No, there isn't a temperature to turn helium into a solid.
Define thermal energy.
Thermal energy: the energy generated by the movement or vibration of particles; the total kinetic energy of all the particles in a substance