Topic 2- Measuring Temprature
What is the most commonly used temperature scale in the world?
Celsius scale
Define Thermal Energy.
The total kinetic energy in the particles of an object.
What is the energy change hidden from a thermometer called?
latent heat
Name 4 types of energy sources.
Mechanical, chemical, nuclear, electrical, etc.
Name an advantage and disadvantage of hydro-electric dams.
Advantage: They look very impressive, so they contribute to the tourism industry.
Disadvantage: They affect the wildlife around were they are built.
What temperature is absolute zero?(In degrees Celsius)
-273.15oC
What are the main 4 ideas in the Particle Model of Matter?
-All matter is made up of tiny particles too small to be seen.
-The particles are always moving.
-The particles have space between them.
-The motion of the particles increases as the temprature increases.
Define heat capacity.
The amount of thermal energy that warms or cools an object by one degrees Celsius.
What is the least frequent radiation waves?
Radio waves
What are the two problems with fossil fuels?
-They are non-renewable resources.
-They produce carbon dioxide which contributes to the greenhouse effect by not letting the extra thermal energy on Earth to leave into space.
Who invented the first ever thermometer?
Galileo
What is the difference between Thermal Energy and Temperature?
Thermal Energy is the total kinetic energy of the particles in a substance, but temprature is the average kinetic energy.
What is evaporative cooling?
It is when the quicker moving particles of a liquid evaporate leaving the slower moving particles to stay causing the average kinetic energy to lower.
What is the most frequent radiation wave?
Gamma rays
What is cogeneration?
A method of energy conservation by which waste heat from one industry is used by another industry.
What does anything warmer than absolute zero give of?
Infrared Radiation(IR)
What is energy?
Energy is the quality of a substance to do work or cause change.
What happens during a phase change?
The organization of the particles changes, but the temprature does not.
Name the 5 features of an energy transfer system.
Energy Source, Direction of Energy Transfer, Transformations, Waste Heat, Control Systems
Define active solar heating.
A type of heating that uses mechanical devices to distribute stored thermal energy.
What is Lord Kelvin's real name?
William Thomson
Define Particle Model of Matter.
A scientific model of the structure of matter.
Define specific heat capacity.
The amount of thermal energy needed to warm or cool one gramof a material by one degrees Celsius.
Name the three characteristics of all radiation.
-They behave like waves.
-They can be absorbed and reflected by objects.
-They travel across empty space at the same very high speec of 300 000 km per second.
Define passive solar heating.
A type of heating that uses materials in a structure to absorb, store and release solar energy.