Final Flashcards
Explain how the wavelength and frequency of a wave related to the amount of energy in a wave
The higher the energy the shorter the wavelength the higher the frequency.
You are standing in a a large empty building as you talk you can head your voice return to you after a second or two. What property of waves is being demonstrated. Explain your answer
reflection and the sound waves bounce off the wall coming back to you
What property of the sun controls the orbits of the planets
Gravity
The inner four planets are described by what?
Terrestrial planets
Place the planets in the correct order
Mercury Venus earth mars Jupiter Saturn Uranus Neptune Pluto
The orbits of most planets are what?
Elliptical
Objects in galaxies are held together by what?
The gravitational pull of objects within them
What occurs during a lunar eclipse?
The moon passes through the earths shadow.
What phase of the moon does a lunar eclipse occur during?
Full moon
Using the numbers on the diagram place the phases in the order according to the numbers
1(third quarter) 2(waxing crescent) 3(new moon) 4( waning gibbous) 5(full moon) 6(waning crescent) 7( first quarter) 8( waxing gibbous)
When the illuminated portion of the moon gets smaller and smaller every night the moon is said to be….
Waning
When the illuminated portion of the moon get larger and larger every night the moon is said to be….
Waxing
The average daily temperature in the northern hemisphere is coldest when
the suns rays hit the northern hemisphere at an indirect angle
Because the suns rays strike different parts of the earth at different times we have….
Seasons
When the earths axis is tilted neither toward nor away away from the sun we have..
Vernal and autumnal equinoxes
At the start of what season is the sun lowest in the sky?
Winter
What is true about the moon rotation?
The moon rotates once for each revolution
When the northern hemisphere is experiencing winter the southern is experiencing…..
Summer
A scientist observes the same craters on the same surface side of the moon because….
The moon rotates and revolves at the same speed
Darkest part of the shadow..
Umbra
Lighter part of the shadow…
Penumbra
Why do we not have eclipses every new and full moon?
The moons orbit is tilted 5°
How many tides occur in a 24 hour time period?
4
Tides are caused by….
The gravitational pull or the earth and moon
How many high tides occur in 24 hours?
2
What types of tides occur when high tides are at their highest and low tides are at their lowest?
Neap tides
As earth revolves around the sun earths axis…
Remains at the same angle pointed in the same direction
The seasons are the result of the (blank) tilt of the earths (blank) as it orbits the sun
23.5°, axis
What type of picture is pictured in the diagram?
Study 2 pictures on camera roll
Give an example of a transverse wave and describe its parts
A wave in the water is an example of a transverse wave and its parts include, crest, trough, wavelength, amplitude, and resting point
Give an example of a compressional wave and describe its parts
An example of a compressional wave is a sound wave and it’s parts are, rarefraction, compression, and wave length
The sun shines through a rain drop creating a rainbow. What property of light wave is being represented? Explain your answer.
Refraction is being demonstrated because when the light shines through the rain drop is refracts off the rain drop bending the light and shining the light through the color prism creating a rainbow.
Analog waves can carry more data than digital waves? True or False
False
Analog waves are better for transmitting data because they do not degrade? True or false
True
Describe the difference between a mechanical and electromagnetic wave
Electromagnetic waves do not need a medium to travel through while mechanical ones do
Wave equations
Wavelength=speed divided by frequency
Frequency= speed divided by wavelength
Speed= wavelength x frequency
Speed= m/s
Frequency= hz
Wavelength= meters
X Ray is to…
Imaging the body
Visible light is to…
Vision
Radio waves is to…
Transmitting tv signals
Gamma rays are used for….
Radiation therapy
Infared light….
Thermal imaging
Microwaves…..
WiFi
Ultraviolet…
Sterelazation of medical tools.
