Blank Flashcards
Give an example of a transverse wave and describe the parts of the wave
Example: ripples on water surface
Parts: crest, trough, amplitude, wavelength, and resting point.
Give an example of a compressional wave and describe the parts of the wave
Example: sound wave
Parts: rarefaction, compression, and wavelength.
The sun shines through a light rain creating a rainbow. What property of light waves is being demonstrated. Explain your answer.
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
Explain how the wavelength and frequency of a wave are related to the amount of energy in a wave.
The more the energy means the smaller the wavelength. So, the less the energy the longer the wavelength. That is the relationship between them.
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.
Sound waves being reflected back to you
What property of the sun controls the orbits of the planets?
The gravity of the Sun keeps the planets in their orbits. They stay in their orbits because there is no other force in the Solar System which can stop them.
The inner four planets of our solar system are described by what term?
Terrestrial planets
Place the planets in the correct order with the planet closest to the sun.
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 _______
Gravitational Pull/ or gravity
What occurs during a lunar eclipse?
A lunar eclipse occurs when the Moon passes directly behind Earth and into its shadow. This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned, with Earth between the other two
What phase of the moon does a lunar eclipse occur during?
Full moon
What type of eclipse is pictured in the diagram.
I don’t know maybe a lunar or solar or partial solar or partial lunar
Know the phases of the moon by their position in orbit
I think I know them
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 ______.
WHEN THE SUN 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 ______.
Seasons
The seasons are the result of the ______ tilt of the earths ____ as it orbits the sun
Earth has seasons because our planet’s axis of rotation is tilted at an angle of 23.5 degrees
As the Earth revolves around the sun the Earth’s axis _________.
Points the same directions
When is Earth’s axis tilted neither toward nor away from the sun?
The Equinox (Vernal & Autumnal) There are only two times of the year when the Earth’s axis is tilted neither toward nor away from the sun
At the start of what season is the sun lowest in the sky?
Winter
What is true about the Moon’s rotation?
That is rotates and revolves at the same speed
When the northern hemisphere is experiencing winter the souther hemisphere is experiencing____.
Summer
A scientist observes the same craters on the surface of the moon everyday because ____
We only see one side because the rotation and speed of the moon is the same
What is the darkest part of the shadow called?
Umbra
The lighter part of the shadow is called the _______.
Penumbra
Why do we not have an eclipse every new and full moon?
The moons orbit is tilted 5 degrees
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?
Neap
Analog waves can carry more data than digital waves. True or False
False
Analog wave are better for transmitting data because they do not degrade. True or False
False
Describe the difference between mechanical and electromagnetic wave
Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission
Know the methods to find the wavelength, frequency or speed of a wave
Speed = frequency X wavelength Frequency= speed divided by wavelength Wavelength = speed divided by frequency.
Speed = frequency X wavelength
Frequency x Wavelength = Speed
Frequency= speed divided by wavelength
Speed dived by wavelength = frequency
Wavelength = speed divided by frequency.
Speed divided by frequency = wavelength
Know the units for speed, frequency, and wavelength.
Speed is m/s
Frequency is hz
Wavelength is m
Match the type of wave with its uses. 1.radio 2.microwave 3.infrared 4.visible light 5.ultraviolet 6.xray 7.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
A-4 B-6 C-5 D-3 E-1 F-2 G-7
