The Basics of Heat & Particle Theory
What is Thermal Energy?
The total kinetic energy of all the particles in a substance.
Three methods of heat transfer.....
Conduction, convection, and radiation
Name 4 different types of alternative energy?
Wind, Solar, biomass, geothermal
Explain the process of radiation and green house gases ?
Radiant energy passes earth atmosphere and some is absorbed by earth and some is reflected.
What is renewable energy?
Energy sources that are naturally replenished, such as wind or solar
What is Temperature?
This measurement represents the average kinetic energy of particles in an object.
How does heat move?
Heat always transfers from an object with this temperature to one with a lower temperature.
What is nuclear energy?
This energy source uses the splitting of atoms to create heat but produces radioactive waste.
Name one negative and one potential positive effect of the greenhouse effect.
1. Heat planet, makes food
2. Over heat planet, climate change
Which type(s) of energy transfer occur(s) when a hot air balloon is turned on to float?
convection
What is density?
This is why hot air rises and cold air sinks during convection.
What is the term for showing warm air/liquids rising and cool air/liquids falling?
What is burning fossil fuels and where does this occur ?
The primary human activity responsible for the increase in greenhouse gases like CO_2. Factories, cars etc
Name the greenhouses gasses found in atmosphere and chemical formulas.
N2O-Nitrous Oxide
CO2-Carbon dioxide
CH4- Methane
Use the idea of convection to explain sea breezes
Over Land: Air warms expands becomes less dense rises.
Over Water: Air stays cooler remains more dense sinks and moves toward the land.
Result: A continuous convection current is formed.
What is the Particle Theory of Matter?
This theory states that all matter is made of tiny particles that are always moving.
Thermal Expansion vs Thermal Contraction
Heat is added (Temperature increases) vs increases).Heat is removed (Temperature decreases).
Pick one alternative energy source answer the following:
One advantage
One disadvantage
Opinion is it a good source explain?
vary
Explain and give example of conventional and alternative energy terms.
answers may vary
Explain heat transfer of radiation
radiation transfers energy through electromagnetic waves. Because these waves can travel through a vacuum, radiation is the only way heat can travel through the empty space of the universe.
Kinetic energy is ....
Energy that all moving objects have.
What are insulators?
These materials, like wood or plastic, are poor at transferring heat and are used to slow energy loss
Does Ice melt faster in hot or cold water?
In the melting ice activity, ice melts fastest in hot water for this scientific reason.
The greenhouse gas that is released from animals such as growing and raising cattle is called __________________________________.
Methane
Which Metals was best and worst conductor in Mr.Johnson's Experiment
copper and stainless steel