Flashcards
Space Science (Grade 9 )
Cards in this deck (96)
- 1any object that exists in spaceCelestial object
- 2a celestial object that is made up of hot gasesstar
- 3a round celestial object that orbits around one or more starsplanet
- 4when an object does a 360 degree turn on its axisrotation
- 5when an object rotates fully around another objectrevolution
- 6Three pieces of evidence showing the Earth is round1. Disappearing Ships
2. The Changing Sky
3. Earth's Curved Shadow - 7the first astronomers made observations ___ ago6000 years
- 8the process of determining the location of a point by measuring two angles at either end of a fixed baselineTriangulation
- 9helps in triangulation by measuring the angle above the horizonastrolabe
- 10patterns of shapes people and animals in the skyconstellation
- 11light travels the distance of ____ in a year (light year)9.46 x 10^12 km
- 12light travels at the speed of ____3 x 10^5 km/s
- 13brightness of a star seem from Earthapparent magnitude
- 14The North Star is also known as ____Polaris
- 15the pointer stars are the ___two stars on the end of the Big Dipper
- 16all stars move slowly ____ throughout the yearwestward
- 17The earth's orbit around the Sun is ____elliptical
- 18The Earth's axis is tilted at an angle of ____23.5 degrees
- 19Higher concentration of sunlight warmer temperatureHemisphere is facing TOWARDS the Sun
- 20Lower concentration of sunlight Cooler temperaturehemisphere is facing AWAY from the Sun
- 21The moon orbits the Earth in about ___29.5 days
- 22by the time it finishes to revolve around the earth, the moon spins ___ on its axisonce
- 23the moon's _____ and ____ are the samethe moon's rotational period and orbit period are the same
- 24the ____ of the Moon is always facing the EarthThe same portion of the Moon is always facing the Earth
- 25phases if the Moon1. New Moon 2. Waxing Crescent
3. First Quarter 4. Waxing Gibbous
5. Full Moon 6. Waning Gibbous
7. Third Quarter 8. Waning Crescent - 26Waxingincreasing
- 27Waningdecreasing
- 28Gibbousthe amount of light we see between half-lit and fully-lit
- 29CrescentThe amount of light we see is between half-lit and non-lit
- 30When one celestial body passes directly in front if anotherEclipse
- 31Lunar Eclipsethe moon passes through the umbra of the Earth's shadow
- 32Happens __ a yeartwice, because the moon's orbit is tilted
- 33Solar EclipseThe shadow of the Moon falls on the Earth's surface
- 34The solar eclipse also occurs twice a year
- 35Caused by the gravitational force between the Earth and the MoonTides
- 36the moon pulls at everything on Earth but only water can move.
- 37why do we not see a solar eclipse every time the Moon is between the Sun and Earth?You have to be in a specific place, usually a very remote place, to see the solar eclipse
- 38Far more people have seen a lunar eclipse than a solar eclipse. Why?You can see a lunar eclipse anywhere on Earth
- 39The universe is defined asEVERYTHING!
- 40the universe is ___ old13.8 billion years old
- 411 AU is....the distance between the Earth and the Sun,
1.5 x 10^8 - 42Our solar system is comprised ofthe Sun and everything that orbits it
- 43Planets are held in orbit by ...The Sun's gravitational pull
- 44The Earth is moving about ___30km/s
- 45The first model of the solar systemGeocentric Model
- 46The Geocentric Model states that __ is at the center and everything in the solar system orbits itEarth is at the center, as displayed in the Geocentric Model
- 47The model that stated that everything in the solar system orbits the SunHeliocentric Model
- 48_____ developed the Heliocentric Theory in the ____Copernieus developed the Heliocentric Theory in the 1500's
- 49A planet has to meet three criteria1. it must be round
2.., It must orbit a star
3. It must be large enough ( have enough gravitational pull) to clear it's orbit - 50an object that's made up of rocky materials, ice, and gascomet
- 51where does comets come from?It comes from the Kuiper Belt and the Oort Cloud
- 52Why do their tails always point away from the Sun, regardless of it they're travelling towards or away from it?The wind of the Sun causes the gases and particles of the comet to be pushed back, which forms a tail
- 53piece of rock that's moving through spaceMeteoroid
- 54a meteoroid that hits Earth's atmosphere and burns upMeteor
- 55a meteoroid that passes through the Earth's atmosphere without getting totally burnedMeteorite
- 56what are shooting stars really?Meteors
- 57Challenges of space travel- distance
- costly
- need food and air for long trips
- need protection from extreme heat and extreme cold - 58Two types of space exploration-Humans
- Instruments ( planetary orbiters, landers and satellites ) - 59Telescopes can detect....All telescopes detect electromagnetic radiation
- 60Radiation is...Waves that travel at the speed of light
- 61Examples of radiation are...Radio waves, light rays, rays
- 62Optical telescopes can..detect visible light
- 63The two types of optical telescopes are...Refracting and Reflecting telescopes
- 64Refracting telescopes uses...A lens to collect light from an object
- 65Reflecting telescopes uses...a mirror to collect the light from an object
- 66Non optical telescopes can...Detect non visible radiation
- 67Radio waves are able to...go through clouds
- 68you can use non optical telescopes on...a cloudy day or at night time
- 69Radio waves are ______________ on the receivercollected and focused
- 70A ___ amount of the radiation from space is absorbed by the Earth's atmospherelarge
- 71Telescopes are placed in ___ above the _____placed in space, above Earth's atmosphere
- 72Pros about telescopes in space- Can detect objects that re not otherwise visible from Earth
- powered by solar energy - 73cons about telescopes- very expensive and difficult to repair/ upgrade
- difficult to point accurately at an object ( not anchored ) - 74Orbiters are ..- launched into space to orbit a planet or a moon
- 75Orbiters can ...collect data and take pictures of celestial objects
- 76cons about orbiterssometimes orbiters malfunction come too close to the celestial object and burn up in the atmosphere
- 77Landers areplanetary instruments that can't move around
- 78Landers can..sample data from one specific location on a celestial object
- 79Landers can only last fora few months
- 80Satellites are...an artificial object or vehicle that orbits Earth, the moon, or other celestial bodies
- 81satellites are ____ becausethey are a important part of our daily lives because of weather reports, internet, radio and cell phones
- 82a GPS stands forGlobal Positioning system
- 83a GPS is programmed inall new smart phones
- 84Remote - sensing satellites can...complete i orbit of the earth every 90 minutes
- 85Scientists use the remote sensing satellite tostudy weather (meteorology)
study the climate (climatology )
study the ocean (oceanology )
study of water (hydrology ) - 86Satellites that are located farther away from the Earth and takes 24 hours to orbit the earth are called ...Geosynchronous Satellites
- 87Geosynchronous Satellites are used to...broadcast television programs and satellite radios
- 88The most important celestial object for life on earth isThe Sun
- 89The Solar System was formed from ...Gravity that set gases and dust particles into motion forming a young star called a protostar
- particles gather as the spinning cloud and start joining together
- Rocks and dust that didn't fall into the Sun collided with each other to forn the planets - 90The Solar System was also formed from ...collisions are common among spinning nnebulas
- nebula forms rocky lumps called planetesimals
- if planetesimals can survive collisions they form planets - 91Where did the Sun come from?Solar Nebula theory
- describes how stars and planets form from contracting, spinning disks of gas and dust
- nebula collapse and contract compressing gases and increasing the temperature
-nebula fission begins - 92What is the Sun composed of?75% hydrogen
25% helium
- small amounts of other gases - 93Nuclear fission is ...Energy production that is a result of hydrogen atoms combining to form helium
-nuclear reaction - 94When the Sun grows, ....Helium settles in the Sun's core because it is more dense than hydrogen
- Region of hydrogen around the core grow larger
- the sun is 30% larger today than when it was a protostar, 5 billion years ago - 95The sun's lifespan is10 billion years
- 96Features of the Sun-photosphere: the surface layer of the sun, which is 6000 degrees Celsius
- sunspots: are of strong magnetic fields on the photosphere, cooler than the photosphere ( 4ooo degrees), occurs in 22 year cycles, peaking in numbers ever 11 years
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- Science (Space) Flashcards on Space Science (Grade 9 ) , created by StudyBug14 on 05/12/2014.
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- StudyBug14 · Dec 2014
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- Apr 6, 2018
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