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Environ. Sci. final
Environmental Science 9 Final
Question | Answer |
---|---|
What does the frequency of a sound wave determined? | pitch |
A wave will travel only as long as it has _________ to carry. | energy |
What is the law of conservation of matter? | Matter can not be created or destroyed. |
Write and balance and equation using Na and Br2. | 2Na + Brx ---> 2NaBr |
Write and balance and equation using Ca + O2. | 2Ca + Oc --> 2CaO |
When you add the charges of a compound, what do the charges need to equal? | zero |
What law says current is equal to the voltage difference divided by the resistance? | OHMs |
What is a conductor? | helps the flow of an electron |
What is an insulator? | opposes the flow of electrons |
2 positive charges __________ on another | repel |
A path that allows only one route for an electric current is called a _____. | series |
A circuit that has two or more branches for electrons to follow is a _____ circuit. | parallel |
Neutrons are ________. | neutral |
Protons are _________. | positive |
Electrons are ________ | negative |
Energy in the form of motion is ________. | kinetic |
Stored energy is ________. | potential |
Potential energy is | top |
Kinetic energy is the greatest at the | bottom |
What is the law of conservation of energy? | Energy can not be created or destroyed. |
As particles in an object move faster, the temperature | increases. |
Compressional waves are | parallel to medium |
Transverse waves are | perpendicular |
The _________ is the height of the wave from rest. | amplitude |
The amplitude is the ____________ a wave has. | amount of energy |
The trough is the _________. | low point |
The crest is the _____. | high point |
If the frequency is cut in half, the wavelength will ______. | double. |
The ability of two or more waves to combine and form a new wave is _____. | interference |
Reflection is ______. | returning light |
Refraction is ______. | bending light |
What is Ohm's law? | current is equal to voltage and resistance |
The net accumulation of electric charges on an object is | static electricity |
Resistance is | the ability to oppose the flow of the electrons |
Current is | the flow of electrons through a wire or conductor |
Insulators do not | conduct a current |
Conductors | encourage a curent to flow |
What are permanent magnets? | objects that are magnetic all the time |