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Astronomy Notes
Section C Chapter 4 test notes
45
Science
6th Grade
04/27/2011

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Cards

Term
____________'s model showed the solar system revolving around the Earth
What was wrong with this model?____________
Definition
Ptolemy
Planets orbit the sun
Term
___________'s model showed the planets moving in circles around the sun
What was wrong with this model? ___________
Definition
Corpericus
Planets orbit elliptically
Term
___________'s model showed the planets revolving around the sun in elliptical orbits
Definition
Kepler
Term
The nine planets that move around the sun are different in size, atmosphere, distance from the sun, and number of moons
Definition
Just know your facts!
Term
The greeks called the planets ____________ because they appeared to be moving among the groups of stars
Definition
wanderers
Term
What are AUs?
Why do scientists use AUs?
Definition
Astronomical Units
Distances in the solar system are too large to use Kilometers
Term
One AU equals the distance between what two objects in our solar system?
How many miles is an AU?
Definition
Earth and the sun
93,000,000 miles
Term
__________ keeps the planets in orbit?
Who discovered "_________"?
Definition
Gravity
Isaac Newton
Term
Why do planets shine?
Definition
Reflecting sunlight
Term
Planets are much closer to Earth than any star, so they appear _____________.
Definition
brighter
Term
What objects are in our solar system?
Definition
Asteroids, sun, meteoroids, comets, and planets
Term
How many stars are in our solar system?
Definition
one
Term
Do stars create their own light?
Definition
yes!
Term
WHat revolves around the sun?
Definition
Planets, asteroids, comets, and meteoriods
Term
How do objects in the solar system effect Earth?
Definition
They enter earths atmosphere
Term
What in our solar system burns up?
What in our solar system hits the ground?
Definition
meteors
meteorites
Term
What makes life possible on Earth?
Definition
The sun's heat and light
Term
Why does the sun seem so bright from earth?
Definition
It is so much closer to earth than any other star
Term
What causes the rise and fall of our ocean's tides?
Definition
the gravity from the sun and the moon
Term
What kind of star is the sun?
Definition
average
Term
How are stars (and the sun) categorized?
Definition
By its size, temperature, and brightness
Term
How do scientist measure far distances to stars and galaxies?
Definition
Light years
Term
How long is a light year?
Definition
6,000,000,000,000
Term
What does a star's brightness depend on?
Definition
how big, hot, and how far from earth it is
Term
The bigger and hotter a star is, the more light it gives off
Definition
Just know it!
Term
How do cool stars appear?
How do Medium hot stars appear?
How do the hottest stars appear?
Definition
Red
Yellow
Blue or White
Term
________________ are groups of stars that make a picture in the sky by appearing close to each other
Definition
Constellations
Term
Are galaxies actually close together?
Definition
no
Term
What are galaxies?
What is the name of our galaxy?
Definition
huge groups of stars that are fairly close together
The Milky Way
Term
Spectroscopes identify the __________ in a star by separating ____________ into a pattern of __________ and ______________
Definition
Elements
light
lines
colors
Term
Reflecting and reflecting telescopes are optical telescopes because they gather the _____________ light waves
Definition
visible
Term
The _________ and _________ in optical telescopes focus __________ and _____________ _____________
Definition
Lenses
Mirrors
Light
Magnify images
Term
A radio telescope gathers radio _________
An infrared telescope gathers infrared _______
Definition
waves
rays
Term
How can images from a space telescope be recorded?
Definition
on film on by electronic detectors
Term
_________ and other radiation that is recorded by _________ in ___________ do not pass through the __________.
Definition
LIght
Telescopes
Space
Atmosphere
Term
What could light and other radiation that is recorded by telescopes in space passing through the atmosphere do?
Definition
Blur the images
Term
Why are images from telescopes on Earth blurred?
Definition
because of particles in the air or the temperature of the air
Term
Do images in space produce clearer images than telescopes on Earth? If so, why?
Definition
they do because they are closer and past all the particles in space
Term
The distance light can travel in a year
Definition
light year
Term
a group of stars that form a pattern in the sky
Definition
constellation
Term
a ball of ice, dust, and gases
Definition
comet
Term
spacerock that lands on earth
Definition
meteorite
Term
shows how something works
Definition
model
Term
an instrument that separates light into patterns of lights and colors
Definition
spectroscope
Term
the bending of light
Definition
refraction
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