Light waves travel through ____________ waves.
a) ocean
b) transverse
c) longitudinal
transverse
*** be sure to know the parts of a transverse wave***
100
If a note is played higher on an instrument, what happens to the sound wave?
It has a greater frequency! So the wavelength would be much shorter.
100
How does the number of protons and electrons compare in an atom that has gone through no chemical bonding?
Protons and electrons are even, then when they chemically bond the number of electrons could change.
100
What is the name that we give to the electrons that are used for chemical bonds on the outermost shell of an atom?
Valence electrons
100
How would you chemically change a piece of paper?
burn it
200
If you wanted to make sound travel the quickest, which would you speak through?
A gas, liquid, or solid
Solid, sound travels fastest through a solid because the atoms are so close together.
200
What simple machine does Pascal's Law apply to?
Hydraulics - it states that in a closed system filled with a fluid, if you put pressure on one area, the pressure is evenly spread out in the rest of the system.
200
When an atom has more protons than electrons, it has a __________________ charge.
positive
200
When a chemical reaction absorbs heat, so that the mixture's temperature drops, it is called an _______________ reaction.
Endothermic
200
What kind of electromagnetic wave is being sensed when using night vision goggles?
Night vision goggles read the infrared waves coming off of heat-producing organisms.
300
Which object would be warmest in the Sun: a white tshirt or a black tshirt?
WHY?
Black!
Black absorbs all colors of light, and the photons excite the atoms of the shirt, causing them to move faster, and creating heat energy.
300
Name one tool that uses Pascal's Law to function.
Hydraulic car lift, braking system in cars, the syringe system on your crane.
300
The atomic number of an element indicates how many __________________ an element has.
protons
300
When a reaction releases heat, so that the temperature of the mixture goes up, it is a _____________ reaction.
Exothermic
300
What color of light does a red shirt reflect?
Red! It absorbs every other color of visible light.
400
What kind of electromagnetic waves are used in a tanning bed?
Ultraviolet
***Review the different types of EM waves, you can use your EM Town Worksheet to help you study***
400
How would you mechanically change an orange?
Slicing it, mashing it, throwing it, rolling it, freezing it, etc.
400
When we draw a Bohr Model of an atom, the innermost shell can hold ____ electrons, and the second shell can hold ____ electrons, and the third shell can hold ___ electrons.
2 8 8
400
Would lithium and fluorine form a chemical bond? Why or why not?
Yes! Lithium has 1 electron on its outer shell, and fluorine has 7. Lithium will give its electron to fluorine so that they can both have full outer electron shells.
400
True or False:
Matter is added during a chemical reaction, so the mass is greater after the reaction has occured.
False! The Law of Conservation of Matter states that matter can neither be created nor destroyed.
500
Why can high frequency Electromagnetic Waves be dangerous to humans?
With a higher frequency, ultraviolet, x-rays, and gamma rays have higher energy levels. When exposed to these waves of light, they can cause radiation poisoning.
500
What is the measure of the amount of energy in a transverse wave?
Amplitude
500
Which of these elements are non-reactive? Why?
Nitrogen
Oxygen
Fluorine
Neon
Neon, because it has a full outer shell of electrons
500
What is one way that you can tell there has been a chemical change?
Color change, temperature change, or a gas is produced
500
What is your science teachers favorite singer or band?
Miss Rainville: Billy Joel, or Queen, or the Beatles, or Elton John
Miss Collector: ABBA, or The Beatles, or Queen, or Phil Collins