Electromagnetic Radiation
True or False...
Electromagnetic (EM) waves need a medium to travel.
False! EM waves DO NOT need a medium to travel through. Mechanical waves do!
What is the element name of the element with the symbol V
Fill in the blanks...
A ball actively rolling down a hill is an example of _________ energy, while a ball sitting at the top of the hill is an example of __________ energyKinetic, Potential
How do sound waves travel?
By vibration of particles
Is density a physical or chemical property of matter?
Physical! You can actively observe if an object will sink or float. A substances' density also DOES NOT change it into a different substance.
Looking at yourself in the mirror is an example of what type of light interaction?
Reflection
Fill in the blanks...
__________ and __________ reside in the nucleus and have a mass of 1. _________ orbits the nucleus and has a mass of <1.
Protons and Neutrons, Electrons
Rarefaction and compression are two characteristics of which type of energy waves?
Longitudinal Waves
Sound waves are mechanical waves.
True! They are mechanical along with ocean waves and seismic waves. They require a medium!
Give an example of a CHEMICAL change
Flammability, Reactivity, or Combustability
What does ROYGBIV stand for?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
8 electrons
Fill in the blanks...
As __________ energy increases, __________ energy decreases. An increase in ____________ energy, leads to a decrease in _____________ energy. The are inverse to one another!
Kinetic, Potential, Potential, Kinetic
Which part of the ear vibrates and transfers these vibrations to the inner ear?
Tympanic membrane (Ear Drum)
Which State of Matter is Described Below...
Particles have little to no room for movement. The only form of movement molecules within this state can do, is vibrate in place.
Solid
Put the electromagnetic spectrum in order from highest frequency to lowest frequency.
Gamma rays, x-rays, UV rays, visible light, infrared, microwaves, radiowaves.
Which family on the periodic table contains full electron shell and are considered stable. They usually don't associate with others.
Noble Gases, Group 8
Give TWO examples of a SOURCE of energy.
Fossil fuels, Nuclear, Geothermal, Hydropower, Wind,
Pitch and Frequency of a sound wave are directly related to one another. What does this statement mean?
As one increases, so does the other. Increased pitch = Increased frequency and vise versa
Dry Ice (CO2) is the solid form of carbon dioxide. When placed in a bowl at room temperature, it directly goes from solid to gas. What is the name of this process?
Sublimation is the process of going from a solid to a gas
Calculate...
The speed of a wave is 65 m/s. If the wavelength is 0.8 meters, what is the frequency of the wave?
65m/s =0.8m x f
We must 65 by 0.8 in order to get he frequency
F= 81.25Hz
Calculate...
How many neutrons are in Au?
Au has a mass number of 197. REMEMBER
mass number = P + N.
The atomic number is equal to the number of protons
Heat can be transferred by conduction, convection, and radiation. Define all 3 terms.
Conduction: heat transferred by direct contact
Convection: heat created by the movement of liquid or gas
Radiation: heat transferred by electromagnetic waves
What is echolocation and give an example.
Echolocation is the use of sound waves bouncing off of an object to detect its location. Examples: ultrasound, dolphins, whales, porpoises
Calculate...
A graduated cylinder starts off with 60mL of water. After dropping a gold ring, with a mass of 20g into the cylinder, the water level went up to 70mL. Calculate the volume of the gold ring. Calculate its density.
In order to obtain the volume of the ring, we must subtract the starting water amount from the final water amount. 70mL - 60mL = 10mL
The volume of the gold ring is 10 mL
Using the volume we just calculated, we can plug it into our density equation. D= m/v. D= 20g/10mL
The density of the gold ring is 2g/mL