Semester study guide Flashcards
Give an example of a transverse wave and describe the different parts of the wave
Ocean
Give an example of a compressional wave and describe the parts of the wave.
Sound
The sun shines through a light rain creating a rainbow. What property of light waves is being demonstrated.
Refraction
Explain how the wavelength and frequency of a wave are related to the amount of energy in a wave.
Greater energy,higher frequency shorter wavelength
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.
Reflection
What property of the sun controls the orbits of the planets?
Gravity
The inner four planets of our solar system are described by what term?
Terrestrial
Place the planets in the correct order with the planet closest to the sun rst.
Mercury,Venus ,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,Pluto.
The orbits of most planets are what shape?
Elliptical
Objects in galaxies are held together by _______
The gravitational attraction of object
What occurs during a lunar eclipse?
The moon goes though the earths shadow.
What phase of the moon does a lunar eclipse occur during?
Full moon
When the illuminated part of the moon appears to get smaller each night, the phases are said to be ___.
Waning
When the visible part of the moon increases each night, the moon is said to be ___.
Waxing
The average daily temperature in the northern hemisphere is coldest when ______.
The sun is pointing away from it
Because the sun’s rays strike different parts of the Earth at different angles throughout the year, we have ______.
Seasons
The seasons are the result of the ______ tilt of the earths ____ as it orbits the sun
Earth,doesn’t move
As the Earth revolves around the sun the Earth’s axis _________.
Doesn’t move
When is Earth’s axis tilted neither toward nor away from the sun?
Equinox
At the start of what season is the sun lowest in the sky?
Winter
When the northern hemisphere is experiencing winter the souther hemisphere is experiencing____.
Summer
A scientist observes the same carters on the surface of the moon everyday because ____.
The moon rotates and revolves at the same speed
What is the darkest part of the shadow called?
Umbra
What is the lighter part of the shadow called?
Penumbra
Why do we not have an eclipse every new and full moon?
The 5 degree tilt of the earths orbit
How many tides occur in a 24 hour period?
4
Tides are caused by the gravitational pull of the ___.
Moon and sun
How many high tides occur in a 24 hour period?
2
What type of tides occurs when the high tides are highest and the low tides are lowest?
Spring
Analog waves can carry more data than digital waves. True or False
True
Analog wave are better for transmitting data because they do not degrade. True or False
False
Describe the difference between mechanical and electromagnetic wave
Mechanical waves need a medium to travel and electromagnetic waves don’t
frequency X wavelength
=speed
speed divided by wavelength
=frequency
speed divided by frequency.
= wavelength
