Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
|
What did Galileo prove and how?
|
Porved that the planets orbit the Sun by observing the phases of venus
|
|
|
What else did galileo discover? (2) Why imp?
|
1- discoverd 4 moon orbiting Jupter (imp b/c showed that E not most imp body), 2- discovered moon has craters and mountains (imp b/c church believed universe was perfect and smooth, and he proved them wrong)
|
|
|
What did Kepler dishover about orbits?
|
That they are ellipses, not circles
|
|
|
What are keplers 3 laws?
|
1- orbits are ellipses, 2- area swept out by planet in a certain time, 3- a^3= t^2 (a= avg dist to Sun in AU, t= time in yrs for 1 orbit)
|
|
|
Why is the Earth still hot inside?
|
1- early impacts generated heat, and as it's well-insulated heat doesn't escape much, 2- plate tectonics keeps mantle warm
|
|
|
What are the plates in Earth?
|
they are the cracked crust, which include ocean floor and continents
|
|
|
What is the result of the fast that the plates aren't fixed?
|
continental drift
|
|
|
Why has the Earth's surface features changed?
|
earthquaces, volcanoes, erosion
|
|
|
How have old crusts destroyed?
|
by faults/earthquakes, volcanes, mountain range uplifts
|
|
|
How is our atmosphere composed of?
|
Nitrogen (77%), Oxygen (21%)
|
|
|
How are rocks formed in 2 billion different from contemp rocks?
|
they formed w/o oxygen
|
|
|
What added oxygen to Earth's atmosphere?
|
plant photosynthesis
|
|
|
What is the density of the moon?
|
3.3 kg/l
|
|
|
What are some features of moon?
|
cool, so no current geological activity, no atmosphere, no erosion, used to have magnetism, features we see are "old"
|
|
|
What are two obvious surface features of moon?
|
Maria (dark, smooth regions), Highlands (bright, rugged areas w/ overlapping craters)
|
|
|
What is the cause of lunar features?
|
a period of heavy bombardment of debris
|
|
|
Why can we see still see the impact scars of moon?
|
b/c w/o erosion and geological activity, the surfaces are old
|
|
|
What is the order of the sun, earth, and moon in a solar eclipse? (L to R) When can this occur?
|
earth, moon, sun; New Moon
|
|
|
What is the order of the sun, earth, and moon in a lunar eclipse? (L to R) When can this occur?
|
moon, eath, sun; Full Moon
|
|
|
During lunar eclipse, where would the eclipse be visible?
|
anywhere where ists night and could normally see the full moon
|
|
|
During solar eclipse where would a total eclipse by visible?
|
under the umbra in one particular place
|
|
|
How many hours of day/night in Vernal Equinox?
|
12/12
|
|
|
How many hours of day/night in Autumnal Equinox?
|
12/12
|
|
|
How many hours of day/night in Summer Solstice?
|
15/9
|
|
|
How many hours of day/night in Winter Solstice?
|
9/15
|
|
|
When is moonrise and moonset in new moon?
|
6 am, 6pm
|
|
|
When is moonrise and moonset in waxing cresent moon?
|
9am, 9pm
|
|
|
When is moonrise and moonset in first quarter moon?
|
12pm, 12am
|
|
|
When is moonrise and moonset in waxing gibbous moon?
|
3pm, 3am
|
|
|
When is moonrise and moonset in full moon?
|
6pm, 6am
|
|
|
When is moonrise and moonset in waning gibbous moon?
|
9pm, 9am
|
|
|
When is moonrise and moonset in last quarter moon?
|
12am, 12pm
|
|
|
When is moonrise and moonset in waning crescent moon?
|
3am, 3pm
|
|
|
How off is day 1 from day 2 in time of rise/set?
|
50 minutes diff/ day
|
