Save
Busy. Please wait.
Log in with Clever
or

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever
or

Username is available taken
show password

Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Question

The most accurate Greek attempt to explain planetary motion was the model of:
click to flip
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know

Question

The Ptolemaic model probably persisted for all these reasons Except:
Remaining cards (26)
Know
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Astronomy

Test 1 (part 2)

QuestionAnswer
The most accurate Greek attempt to explain planetary motion was the model of: Ptolemy
The Ptolemaic model probably persisted for all these reasons Except: it accounted well for Galileo's observations of the phase cycle of Venus
The Ptolemaic model of the universe: explained and predicted the motions of the planets with deferents and Epicycles
Scientists today do not accept the Ptolemaic model because: the work of Tycho and Kepler showed the heliocentric model was more accurate
The heliocentric model was actually first proposed by: Aristarchus
Which of these was Not seen telescopically by Galileo? Stellar parallax.
which of the following is a contribution to astronomy made by galileo? All of the above.
Which of these observation of Galileo refuted Ptolemy's epicycles? the complete cycle of Venus' phases
It took two centuries for the Copernican model to replaced the Ptolemaic model because? there was no scientific evidence to support either model until Galileo made his observations
Kepler's first law worked, where Copernicus' original heliocentric model failed, because Kepler described the orbits as: elliptical, not circular.
The most famous prehistoric astronomical observatory is: Stonehenge
A circular orbit would have an eccentricity of 0
Upon which point do Copernicus and Kepler disagree? The orbits of the planets are ellipses with one focus at the Sun.
What contribution to astronomy was made by Tycho Brahe? His observations of planetary motion with great accuracy proved circular orbits could not work
What does Kepler's third law imply about planetary motion? Planets further from the Sun orbit at a slower speed than planets closer to the Sun.
A planet whose distance from the Sun is 3 A.U. would have an orbital period of how many Earth-years? √27
The place in a planet's orbit that is closest to the Sun is called perihelion.
The force of gravity varies with the: (A and C are correct) product of 2 masses and inverse square of the distance separating the two bodies
The law of universal gravitation was developed by Newton
According to Newton's Law of Universal Gravitation if the moon were three times further from Earth the force by Earth on the Moon would: decreases by a factor of 9
How much stronger is the gravitational pull of the Sun on Earth, at 1 AU, than it is on Saturn at 10 AU? 100X.
Which of these was a contribution of Newton to astronomy? His differential calculus lets us calculate planetary motions more accurately. Sun's gravity is greatest on a planet at perihelion, so the planet must speed up. Artificial satellites could be put into orbit about the Earth. Moon pulls as strongly on us
Jupiter lies about 5 A.U. from the Sun, so at its distance: the Sun's gravity is 25 times weaker than its pull on the Earth.
If the distance between two asteroids is doubled, the gravitational force they exert on each other will be one fourth as great.
Escape velocity is the speed required to overcome the gravitational pull of an object.
According to Copernicus, retrograde motion for Venus must occur around inferior conjunction, when it passes between us and the Sun.
Kepler's second law implies what about planetary motion? A planet moves faster when it is closer to the Sun.
Created by: graync
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards