Science unit 3 Flashcards
Define temperature and thermal energy and explain how the two relate to each other.
Temperature is the near amount of measure of heat energy, thermal energy is the total amount of energy. They both measure heat energy.
Why was the Kelvin scale created?
To show the temperature absolute zero
What are the three descriptions of particles mentioned in the particle model of matter?
Solid = fixed position Gas = constantly moving Liquid = takes shape of its container
What happens to the motion of particles as the temperature changes?
Slows down if it is cold
Speeds up if it is hot
Define Energy. Provide an example.
The measure of something’s ability to work, an example could be a fire.
What is the law of conservation of energy?
Energy cannot be created or
destroyed. It can only be transformed from one type to another or passed from
one object to another.
Describe the process of evaporative cooling.
The hot water evaporates, which leaves the cold water inside
What are greenhouse gases and how do they contribute to global warming?
They trap the heat of the sun inside the Earth, increasing the temperature of the earth.
Thermal Conduction:
Thermal convection:
Convection current:
Radiation
Heat passing through solids
Heat passing through liquid and gas
The hot particles rise up and cool, then get hot again, which creates convection currents
Heat travelling through heat waves
What is the difference between a conductor and an insulator?
Conductors lets heat pass through it and the insulator prevents heat from escaping, or passing throught it.
What are two advantages and two disadvantages of using fossil fuels?
It gives energy, can create electricity. Creates harmful gases
Non-renewable
Thermal pollution:
Refrigerant:
Cogeneration:
Geothermal Energy
When heat escapes to the environment
A liquid that is easily evaporated
Recycling greenhouse gases
Heat found inside the earth
