Last Finals Flashcards
Give an example of a transverse wave and describe the different parts of the wave
Answer: ripples on water; wavelength, amplitude, frequency, crest, trough.
Give an example of a compressional wave and describe the parts of the wave
Answer: sound wave; compression, rarefaction, wavelength.
The sun shines through a light rain creating a rainbow. What property of light waves is being demonstrated. Explain your answer
Answer: light enters the water droplet rarefaction bends it and splits the colors.
Explain how the wavelength and frequency of a wave are related to the amount of energy in a wave
Answer: the smaller the wave the more frequency it has.
You are standing in a large empty building and as you talk you can hear your voice return to you after a second or two. What property of waves is being demonstrated. Explain your answer
Answer: reflection; your voice hits the other side of the building and bounces back.
What property of the sun controls the orbits of the planets?
Answer: gravity
The inner four planets of our solar system are described by what term
Answer: terrestrial planets
Place the planets in the correct order with the planet closest to the sun
Answer: M, V, E, M, J, S, U, N, P.
The orbits of most planets are what shape
Answer: elliptical
Objects in galaxies are held together by _______
Answer: gravitational pull
What occurs during a lunar eclipse
Answer: the moon passes through the earths shadow.
What phase of the moon does a lunar eclipse occur during
Answer: full moon
What type of eclipse is pictured in the diagram
Answer: solar eclipse
Know the phases of the moon by their position in orbit
Answer: know their position
When the illuminated part of the moon appears to get smaller each night, the phases are said to be ___
Answer: waning
When the visible part of the moon increases each night, the moon is said to be ___
Answer: waxing
The average daily temperature in the northern hemisphere is coldest when ______
Answer: the suns rays hit the northern hemisphere at an indirect angle.
Because the sun’s rays strike different parts of the Earth at different angles throughout the year, we have ______
Answer: seasons
The seasons are the result of the ______ tilt of the earths ____ as it orbits the sun
Answer: 23.5, axis
As the Earth revolves around the sun the Earth’s axis _________
Answer: stays the same
When is Earth’s axis tilted neither toward nor away from the sun
Answer: spring and autumn
At the start of what season is the sun lowest in the sky
Answer: winter
What is true about the Moon’s rotation
Answer: multiple choice
When the northern hemisphere is experiencing winter the souther hemisphere is experiencing____
Answer: summer
A scientist observes the same craters on the surface of the moon everyday because ____
Answer: the moons rotation is the same speed as it’s revolution
What is the darkest part of the shadow called
Answer: umbra
The lighter part of the shadow is called the _______
Answer: penumbra
Why do we not have an eclipse every new and full moon?
Answer: the moons orbit has a tilt of 5 degrees
Tides are caused by the gravitational pull of the ___
Answer: moon
How many high tides occur in a 24 hour period
Answer: two
What type of tides occurs when the high tides are highest and the low tides are lowest
Answer: neap tides
Analog waves can carry more data than digital waves. True or False
Answer: true
Analog wave are better for transmitting data because they do not degrade. True or False
Answer: false
Describe the difference between mechanical and electromagnetic wave
Answer: mechanical waves require a medium electromagnetic waves don’t
Know the methods to find the wavelength, frequency or speed of a wave
Answer: ok
Know the units for speed, frequency, and wavelength
Answer: speed m/s, wavelength m, frequency Hz.
Match the type of wave with its uses
- radio
- microwave
- infrared
- visible light
- ultraviolet
- xray
- gamma
A.vision B.imaging the body C.sterilization of medical tools D.thermal imaging E.transmission of TV signals F.WiFi G.radiation therapy
Answer: 1-E, 2-F, 3-D, 4-A, 5-C, 6-B, 7-G
How many tides occur in a 24 hour period
Answer: four
