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Science CRCT
Science CRCT flash cards
| Term | Definition |
|---|---|
| One Year | 1 revolution of the earth around the sun is 365 days |
| One Day | 1 rotation of the earth on its axis(it takes 23hrs and 56 min)This is rounded to 24hrs. |
| Spring / Fall Equinox | (dates=3/21,9/21)there is an equal amount of daylight and darkness. |
| Solstice | (dates=6/21,12/21) The longest and shortest days of the year. |
| Phases | objects have appeared to move in the sky because earth is rotating on its axis and revolving around the sun |
| Eclipses | A solar eclipse happens during the day, the moon has to be position between the sun and the earth. A Lunar eclipse happens when the earth is positioned between the sun and the moon. Shadows from the earth and the moon cause eclipses. |
| Mars | Is the last inner planet, has a rust colored surface, polar icecaps, large volcanoes, and channels that allow water to flow on its surface at one time |
| Inner/ Outer Planets | Inner Planets(Mercury, Venus, Earth, Mars are denser/outer planets. The outer planets(Jupiter, Saturn, Uranus, and Neptune) are mostly gases. Pluto the "dwarf planet", is mostly frozen and rocky.Scientist today don't classify pluto as a real planet |
| Moon's revolution | It takes the moon 28 days to revolve around earth. During that time it goes through all of its phases. |
| Big Bang Theory | State that the universe began as a point of energy and matter that exploded which allowed everything in the universe to form |
| Seasons | ( Winter, summer, spring, and fall) occur because the tilt of earths axis, it is tilted at 23.5 degrees. If it was at 90 degrees there would be no seasons. |
| Day and Night | We have day and night on the earth because of earth rotates on its axis. It usually takes around 24 hours |
| Gravity | objects float in space because earths gravity affects objects less and less the farther the object is away from earth. Also gravity holds all of the objects in the solar system in place. |
| Moons shadow | the moons actual shadow cause its phases . The moon can be waxing(gaining light) or waning(losing light) during the month. It also can be shown as a crescent or gibbous. |
| Affecting a shadow | The two things that affect an appearance of a shadow is the position of the light source and the position of the object itself. |
| Asteroid belt | The asteroid belt is located between Mars and Jupiter. It separates the inner and outer planets |
| 3 types of galaxy's | The 3 types of galaxy's are the irregular, spiral, elliptical galaxy's. Our galaxy, the Milky Galaxy is a spiral galaxy. |
| A Comet | A comet is a ball of a rock and ice. Its tail is made when heat from the sun melts the ice and it is released into space |
| Meteor | a meteor is a rock in space that releases a lot of heat when it meets the earths surface |
| Tides | When the earth, moon, and sun are in line it creates very high tides |
| Apollo Space Program | the Apollo space program was the one that eventually reaches the moon. |
| Magnitude | the magnitude of a star depends on the stars brightness. |
| Light Year | a light year is the distance light can travel in a year |
| Nova's/Supernovas | are exploding stars in space |
| Quasars | are star like objects however they are brighter than stars and are one of the most luminous items in space |
| Pulsars | are star that pulsate |
| Telescopes | there are 2 types of telescopes that use visible light: the reflecting and refracting telescope |
| Satellite | natural or manmade object that orbits another object |
| Moon | The moon does not have an atmosphere therefore no erosion or weathering can take place |
| black hole | a black hole is a collapsed star whose gravity has grown so big |
| Photosphere | Is the part of the sun that we can see |
| Big Bang | scientist have said the big bang is still expanding today |
| Geocentric theory | a theory where human believed that the earth was in the center of our solar system |
| A valley | has been more deeply eroded than the 2 valleys in the nearest vicinity |
| Mineral Mica | breaks with cleavage because the atoms have a regular arrangement |
| Coal | is formed when dead organisms that lived many year ago decayed and eventually formed today used as a fuel source |
| Erosion | is the taking of pieces of sediment and moving them with wind, water, and ice |
| Faulting | is the breaking and cracking of earths crust |
| Mountains | have high elevation and sleep slopes |
| Plains | Have low elevations and gentle slopes |
| Halite | halite breaks with cleavage and when it breaks it looks like cubes |
| Limestone | is a good example of a rock that can be worn down by chemicals of the environment |
| Compaction | is when sediments are being pushed together |
| Glaciers | Is a block of ice that is classified as alpine or continental fjords or sea inlets |
| Igneous Rock | is a fire formed rock which is made out of magma and lava. Granite is a very hard igneous rock which Stone Mountain is made out of. |
| Rock Cycle | the rock cycle is the process of rocks changing into one form to another. The 3 main types of rock is igneous, sedimentary, and metamorphic. |
| 3 Types of volcanoes | The 3 types of volcanoes are the Shield, Cylinder Cone, and the Composite |
| 3 Types of earthquake waves | the 3 types of earthquake waves are the Surface wave, the Secondary wave, and the Primary Wave. The primary and the secondary wave occur in the earth. Surface Waves give off the most damage. The Richter scale measures the strength of the earth quake. |
| Seismograph/Seismologist | a Seismograph is the instrument used to pick up seismic waves. A seismologist is a person that study earthquakes. |
| Minerals | Minerals are made from various elements, and they also make up rocks.Minerals also make up rocks.Minerals have various characteristics such as specific gravity.Specific Gravity rations the weight of a mineral compared with an equal volume of water. |
| Silicon | Silicon is the most abundant element. Silicon dioxide ,known as sand, is one of earth most abundant compound.compound. Aluminum is the most abundant metal. |
| An ore | An ore is a rock that contains a metal that can be extracted to help humanity, for example aluminum and titanium can be used to better the society. |
| Foliated rock | Foliated rocks are rocks that form in layers. Nonfoliated rock do not form in layers. |
| Continental Drift | Continental Drift is the scientific process used by scientist to explain how one large land mass millions of years ago became the seven continents we know as of today. |
| Cementation | is the process where rock particles get cemented together. This can happen in sedimentary rocks. |
| Deposition | is the process where sediments are deposited in an area. During this time layers can build up |
| Fossil Fuels | Fossil Fuels are nonrenewable resources. This means once they are used up there will be no more. |
| Stalactites/Stalagmites | are cone like features that form in a cave |
| Paleontology | is the study of the past. A paleontologist is someone that studies the past |
| Unitarianism | is where something sudden happens over a short period of time. Catastrophism is where something sudden happens over a long period of time. |
| Superposition | states that younger rock lie above older rock |
| Rock Layers | can be stretched, folded, uplifted, subducted, and compressed. |
| Plate Tectonics | Indirect evidence of plates moving is a fossil of a fish founded on a mountain no longer covered in water |
| Convection | occurs when sunlight is heating air. The air expands and rises and eventually turns into a cloud. |
| Clouds | form when dense cold air pushes warm air upward. This cools and condenses into clouds |
| Tides | tides occur when the moon has a large enough gravitational pull to pull the water upwards |
| Humidity | is water vapor or dew in the air |
| Ground Water | is used more quickly than it is replaced |
| Deserts | the sky in deserts is not cloudy because there is not enough humidity to form clouds |
| Aquifer | is a very large area underground that can store water for thousands of people. |
| Wind and temperature | variate can cause ocean currents. |
Created by:
emelian215
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