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43 Cards in this Set

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Uranus is ___AU from the sun.
19.19 AU
Mercury is ___AU from the Sun.
.39 AU
Earth is ___AU from the Sun.
1 AU
Mars is ____AU from the Sun.
1.52 AU
Saturn is ____AU from the Sun.
9.54 AU
Neptune is _____AU from the Sun.
30.06 AU
Pluto is _____AU from the Sun.
39.53 AU
The Earth is approx. _________km from the Sun. This distance is equal to __AU.
150 million; 1 AU
Another way to measure distance is to measure the speed of _______.
light
light travels approx. ______km/s.
300,000
How far does light travel in one minute? What is this distance also called?
18 million; light minute
The distances between the planets of our solar system can also be measured in light _______ and light _______.
minutes;hours
DUe to the great distances of the universe, distances between the stars are measured in ______ years which is the distance ________ travels in one Earth _________.
light;light;year
Light travels __________km in one Earth ________.
95 trillion;year
The North Star, aka ________, is _____ light years from Earth.
Polaris;431
Define Satellite.
Real or fake bodies that revolve around larger bodies like planets
List planets without a moon.
mercury, venus
what is the name of Earth's moon?
luna
what conditions are requred for the preservation of almost all the impacts ot a moon by other objects?
the atmosphere
explain the current theory of the moon's origin.
A large object that is about the size of Mars collided with Earth making a huge impact whilte it was still forming. This caused part of the Earth's mantle to be ejected into the Earth's orbit. The formation of Luna was created by debris.
The different phases of the moon are due to changing positions between the _____ and the ______.
earth; sun
What is a waxing moon?
the sunlight fraction seen from Earth that is getting larger
When the Earth comes between the sun and the moon, a _______ occurs.
solar eclipse
When the shadow of one celestial body falls on another, an _______ occurs
eclipse
What is a lunar eclipse?
happens when Earth comes between the sun and the moon
what is an annular eclipse?
occurs when moon comes between the Earth and the Sun
What might be a cause for some of the unusual shapes of some moons in our solar system?
asteroids
Name Earth's moon and describe it.
Luna

density is much less than Earth.
Has different phases due to changing positions between the Sun and the Earth.
Name Mars' moons.
Phobos and Deimos.

have very dark surfaces that reflect even less than asphalt does. material is similar to asteroids.
phobos=28 km long
deimos=16 km long
How many moons does Jupiter have? Name 4 of them and explain.
17 moons.

Ganymede, Callisto, Io, and Europa

Ganymede is larger than mercury and is the largest moon.
Io is caught in gravitational tug of war between Jupiter and its neighbor. It is the most volcanic active body in solar system.
In Europa, scientists think that life evolved in the subterranean oceans of Europa.
Discovered in 1610.
How many moons does Saturn Have? Name one and explain.
18 moons.

Titan has no atmosphere and most of the moons in Saturn are small bodies made mostly of water, ice with some rocky material.
How many moons does Uranus have? Name one and explain.
21 moons

Miranda is made of ice and rocks and are heavily cratered. May have been hit and broken apart in the past
How many moons does Neptune have? Name one and explain.
has 8 moons.

Triton is the largest moon and is captured by Neptune's gravity. its poles sometimes point directly toward the sun and has a thin atmosphere of nitrogen.
How many moons does Pluto have? Name one and explain.
1 moon

Charon has the same period of revolution as Pluto and is half the size of Pluto.
Define fluid friction.
a form of friction that opposes the motion of objects that are traveling through a fluid.
define newtons first law
and object at rest will stay at rest and an object in motion will stay in motion unless an unbalanced force acts upon it.
define newtons second law
mass and the amount of force are the 2 factors that determine an object's acceleration.
define newtons third law
when an object exerts a force on the other object, the other object exerts an opposite and equal force to the first object.

aka action reaction
define pressure
how much force exerted on an object
define terminal velocity
when an object comes to constant velocity
define lift
upward force of object due to pressure under and even move air pressure near bottom against gravity.
define thrust
forward force produced by the engine
define drag
froce that opposes or restricts motion of fluid