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State Ohm's Law using symbols
I=V/R
What are the three forms of heat transfer?
Conduction, convection, radiation
What is an ion and how does it form?
An ion is an atom with a charge. It forms when electrons are either lost, making it a positive ion, or added, making it a negative ion.
What type of substance is a good absorber of heat energy?
A dark colored substance is a good absorber.
Name three facts about electrons.
They are negatively charged, found in orbitals outside the nucleus of an atom, 2,000 times lighter than a proton, behave like a wave and a particle, can be transferred between atoms.
What forms of heat transfer are stopped by a vacuum?
Conduction and convection
What is the law of conservation of energy?
Energy can be neither created nor destroyed. All the energy in the universe was put there by God at the time of creation.
What makes a bulb shine brighter? Batteries arranged in series or in parallel?
In series
State Ohm's Law using words
Current=Voltage/Resistance
What makes a bulb light?
When voltage passes through the filament, resistance creates heat and light.
What are the six major forms of energy on earth?
Thermal, Nuclear, Electromagnetic Radiation, Chemical Potential, Gravitational Potential, Kinetic
Explain what is happening to atoms during conduction.
Atoms that are heated begin to vibrate and bump into neighboring atoms, causing the next atoms to vibrate and so on.
What is kinetic energy?
Energy associated with motion.
Name three facts about a neutron.
No charge (neutral), slightly larger than a proton, found in the nucleus, add mass to the atom.
Name three facts about a proton.
Positive charge, found in the nucleus, 2,000 times heavier than an electron.
What type of substance blocks heat loss by radiation?
A reflective substance.
Describe how fusion works.
Gravity from the sun causes positive hydrogen ions to fuse together and form helium atoms, releasing electromagnetic radiation.
Give an example of gravitational potential energy.
Dam, Wile E. Coyote's piano ...
What direction do electrons flow in a circuit?
Negative to positive.
Give an example of chemical potential energy.
Food, fossil fuels, batteries...
Where on the electromagnetic spectrum is heat found?
Infrared waves (just below red on the visible light spectrum).
What was significant about Rutherford's model of the atom?
Rutherford discovered that the atom is mostly empty space, with the positive charge concentrated in the nucleus and the electrons in an outer orbit.
What do conductors of heat and conductors of electricity have in common?
They are usually metals; metals have free outer electrons so they are effective conductors.
Explain Bohr's model of the atom.
Bohr's model showed the protons in the nucleus of the atom, surrounded by electrons in orbits, similar to planets orbiting the sun. His model did not include neutrons.
Name one way kinetic energy is converted to electricity.
Windmills, waterfalls at a hydroelectric plant, burning fuel creates steam which turns a turbine ....