Measuring Temperature
Who made the Celsius scale?
Anders Celsius
Define thermal energy.
Thermal energy is the energy generated by the movement or vibration of particles
Define contract and expand.
• Contract : to shrink or decrease in volume.
• Expand : to increase in volume
A substance will change its state when it reaches certain temperature called _____
Boiling/Melting points
Define energy source.
Energy source is an object or material that can transfer energy to other objects.
What is the bimetallic strip?
A bimetallic strip is made of two different metals joined firmly together.
What are the four different features of these tiny particles that you should know?
• All matter is made up of extremely tiny particles
• The tiny particles of matter are always moving
• Adding heat to matter makes the particles move faster
•The particles have space between them
____ are matter that are made up of only one kind of particle.
What is evaporative cooling?
Evaporative cooling is a process inwhich the faster moving particles on the surface of a liquid evaporate and escape into the air.
Radiation is the transfer of energy without any movement of matter. Energy that is transferred in this way is called _____ or ________.
radiant energy and electromagnetic radiation
Each of the thermometers described below contains a
_____ , a material that is affected by changes in some feature of the environment, such as temperature.
sensor
Why is it so hard to test the particle model to see if it is correct?
It's hard to test the particle model to see if it is correct because the particles are very tiny so we can't see them or weigh it.
What happens to solids, liquids, and gases as they are warm? What if they were cold?
When they are warm, the particles move faster and expand.
When they are cold the particles move slower and contrast.
What is hidden heat or latent heat?
Hidden heat/latent heat, is the total energy of a substance that increases or decreases during a phase change.
List four common types of energy sources.
Mechanical energy
Chemical energy
Nuclear energy
Electrical energy
Describe how a thermostat controls the temperature in a building.
A thermostat exerts control by switching heating or cooling devices to keep the correct temperature.
What does the Law of Conservation of Energy state?
The Law of Conservation of Energy states that:
Energy cannot be created or destroyed. It can only be transformed from one type to another or passed from one object to another.
Which state of matter shows the largest change in volume when warmed or cooled? Which state shows the smallest change?
The gaseous state is when volume changes easily. The solid-state shows the smallest changes.
If the melting point for tin is 232 °C and the boiling point is 2602 °C, what is tin as a liquid?
2602°C and up
What are the many different forms of EMR?
Radio waves, microwaves, visible light,UV, infrared,X-rays,gamma.
Name all 4 main thermometers.
The Thermocouple
Bimetallic Strip
Recording Thermometer
Infrared Thermogram
What is James Joule known for?
Joule built many ingenious devices.One was a set of paddle wheels that stirred water as they were turned by falling weights.
Bridges are made from materials that ____ and ____ as the temperature changes, so they cannot be fastened firmly to the bank of a river or lake.
contract and expand
List six changes of state.
fusion,evaporation,condenstation,freezing,sublimation
(gas to solid) and sublimation (solid to gas).
List five features of all energy transfer systems.
Energy source
The direction of Energy Transfer
Transformations
Control Systems
Waste Heat