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CRCT Science Review


One day 1 rotation of earth on its axis (this takes 23 hours 56 minutes) this is rounded to 24 hours.
One Year 1 revolution of the Earth around the sun is 365.25 days. This is why we have leap years every four years.
equinox These occur around March 21 and September 21, when we have an equal amount of sunlight all day and all night
solstice These occur around June 21 and December 21, are the longest days of the year
solar eclipse the moon is positioned between the earth and moon
lunar eclipse the earth is positioned between the sun and the moon
Objects in sky Because the earth rotates on its axis and revolves around the sun objects seem to move through the sky
inner planets Mercury, Venus. Earth, Mars the terrestrial (rocky) planets
outer planet Jupiter, Saturn, Uranus, Neptune the Gas Giants
Revolution of the moon it takes approximately 28 days for the moon to revolve around the earth. during this time the moon goes through it's phases.
Big bang theory The theory of how the universe was created states that the universe began as a point of energy and matter that exploded which allowed everything in the universe to form
seasons (winter, spring, summer. fall) these occur because of the tilt of earth's axis. it is tilted at 23.5 degrees. if the axis had no tilt then all of the seasons would be the same
Day and Night we have day and night on earth because it rotates on its axis. One rotation is about 24 hours
Objects in space objects float in space because earth's gravity affects objects less and less the farther the object is from earth. Also gravity holds all of the objects in the solar system
phases of the moon The moon appears to change shape because it revolve around the earth. the moon's actual shadow causes phases of the moon/ the moon can be waxing(gaining lighted area) of waining (losing lighted area) it can also be shaped as a crescent or gibbus
Two thing that affect shadows the two things that affect shadows are the position of the light source and the position of the object itself
Astroid belt the astroid belt is located between mars and Jupiter. it separates the terrestrial planets from the gas giants
types of galaxies the three types of galaxies are irregular ( no definite shape ) elliptical ( oval shaped ), and spiral ( frisbee shaped ). our galaxy the milky way is a spiral galaxy. our solar system is located on the orin arm far from the center.
comet A chuck of rock and ice that orbits the sun like a planet. It's tail is made of melted ice that is pointing away from the sun. They usually are found in the Kuiper belt or Oort Cloud
Meteor A meteor forms because of the friction of the earths atmosphere and between a meteoroid. Sometimes meteoroid strike the earths surface causing it to be called a meteorite. You can Find these in Antarctica
Spring Tide When the earth sun and moon Aline and cause very high tides this is called a spring tide
Neap tide When the sun moon and earth form a right angle and cause a small change in tides this is called a neap tide.
Apollo The Apollo space program was one of the programs that made it to the moon.
Effect of gravity The closer an object moves towards a planet or star, the greater the effect that planet's or star's gravity will have on that object
Apparent magnitude This is how a star appears from earth
Absolute magnitude This is how bright the star really is.
Light year The distance light can travel in one year.it is used to measure extreme distances in space
Novas and supernovas exploding stars In space.
Quasars These are star like objects, however, they are brighter than stars and are considered to be the most luminous
Pulsars Stars that pulsate, when tis happens when stars seem to be dimming and becoming brighter as it pulsates
Electro magnetic spectrum The arrangement of electromagnetic waves.
Reflecting telescopes Use lenses and mirrors to view distant objects
Refracting telescopes Use lenses to view distant objects
Other telescopes Use invisible waves from the electromagnetic spectrum to make images on a computer screens of distant objects
Satellite Any natural or man made object that revolves around another object
Asteroid A large meteoroid in space. These are located in the asteroid belt
Moon's atmosphere The moon has no atmosphere and is in a vacuum therefore erosion or waethering cannot take place.
Info for gas giants All of the gas giants have rings. Saturn has the most rings and jupiter has the most moons
Planets that support life Earth is the only planet in the solar system that can support life
Constellation Patterns of stars in the sky, can provide a map to locate objects in space
AU's/astronomical unit Are used sometimes to refer to the distance in space. One AU= the distance of earth to the sun.
Years of planets The closer a planet is to the sun the shorter the year it will have because it's orbit around the sun is shorter.
Gravitational pull the larger an object is in space the more gravitational pull it will have. the moon has a gravitational pull about 1/6 of the earth. if you weighed 100 pounds on earth you would weigh about 18 pounds on the moon
Life in the universe as of now there is no other life in the universe
Black hole a collapsed star whose gravity has grown so great that even light can't escape it's atmosphere.
Space probe is launched into space to travel to distant areas in space while sending back information by electro magnetic waves
Geocentric theory said that the earth was the center of the solar system
Heliocentric theory said that the sun was the center of the solar system
Location of our solar system is located toward the outskirts of the milky way. our solar system our galaxy and all matter in it are a part of the universe
Globular and open clusters millions stars group together to from these
Photosphere is the part that we can see on earth
Time for light from sun to travel to us it takes 8 minutes for sunlight to reach us on earth
Nuclear fusion the joining of hydrogen atoms together to make helium atoms
Nuclear fission the splitting of atoms to form elements like uranium
Luminous something that gives off it's own light
Illuminated something that reflects the light from other objects
Temperature of stars Stars that are white or blue are actually warmer than red and orange stars
light to earth objects we see at night show us the past because we are seeing the light that left the objects reflected off the object. it can take millions of years for light to reach us
space shuttle takes off like a rocket but flies like an airplane
space station can allow astronauts to stay in orbit earth fro months at a time
universe expansion today the universe is still expanding
Created by: Awesomepaul115 on 2014-04-14

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