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Science 9 Unit E Flash Cards
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- 1SolsticeLongest and Shortest day of the year
Sol = Sun
Stice = Stop - 2EquinoxNight & Day are =
Equi = equal
Nox = night - 3GeocentricEarth Centred
Aristotle - 4HeliocentricSun Centered
Copernicus' - 5Light YearUsed to measure distances OUTSIDE our solar system
300 000 km/s!!!!! - 6Astronomical UnitUsed to measure LOCAL distances (Distances in our solar system)
AMU - 7ConstellationsRecognized star patterns in the night sky
88 in total - 8AsterismUNOFFICIALLY recognized star patterns
- 9GalaxySolar System
millions and billions of stars held together by gravitational forces - 10Black HoleRegion of space that has a gravitational pull so strong no even light can escape it!
- 11***Why is looking at stars in space looking in to the past?Stars are so far away that it can take light years for a stars light to reach us. So light from lights years in the past is actually the light we see.
- 12How can we use the Hertzsprung-Russell diagram to determine the temperature and brightness of stars?the diagram tells us the temp and brightness of stars. The HIGHER on the diagram the BRIGHTER the star is. The FARTHER you go RIGHT the COOLER the star get.
- 13***What did these significant occurrences mean for ancient peoples? (ex. Stonehenge, solstice…)Stonehenge - Marked the solstices
Solstice & Equinox - Told them when it was time to plant and harvest - 14The three galaxy typesSpiral
Elliptical
Irregular - 15The 2 star life cycle sequences?Sun-like Star - Nebula_Protostar_Sun-like Star_Redgiant_White dwarf_Black Dwarf
Massive Star - Nebula _ Protostar_Massive star_RedSUPERgiant_SUPERNOVA_Black Hole OR Neutron Star - 16***Planets – general information, and the order; terrestrial vs. JovianM
V
E
M
J
S
U
N
Jovian - Gaseous - bigger - Rings - Lots of moons
Terrestrial - Rocky - smaller - No rings - Few moons - 17Define: Comets, Meteors, Meteorites, and MeteoroidsComets - "Dirty Snowballs" _ Appearances can be predicted because of their predictable ellipses _ tails alway face directly away from the sun
Meteoroids - Flying randomly in space
Meteors - Burning in Earth's atmosphere - Atmospheric pressure makes they glow
Meteorites - Meteors that have hit Earth - 18How is an astrolabe used to determine the position of celestial objects? Define altitude and azimuth.Azimuth – Compass direction – Always moving Clockwise
Altitude – height of object
First, look at the bottom of the astrolabe you will see a compass, place it on a flat surface and line up 0 with north.
Second, you use the top flat part (altitude finder) and make sure you can see the object you are looking for in the 2 small holes. Then you will take the number at the bottom of the flat part (# is the height) Third, look at the bottom part again and find what number your object lines up with. - 19Parts of a RocketPayload
Fuel
Structural & Mechanical Parts - 20What is the speed needed by rockets to overcome Earth’s orbit? What is a possible solution to avoid the problem of Earth’s gravitational pull when launching interplanetary rockets?28 000 km/h is needed to overcome Earth's orbit/gravity
Launching from the ISS is an option when trying to avoid Earth's gravity.
A purpose of the ISS is launching interplanetary rockets. - 21Give info about: Shuttles, Space Probes, StationsShuttles - To bring people and supplies to space crafts
Space Probes - UNMANNED space crafts/remote controlled to explore other planets/distant places
Stations - Observation, Research, Launching interplanetary rockets - 22Some spacesuit featuresOuter layer radiation protection
Inner layer - Cold protection
Lights - 23What is the difference between gravity and microgravity? What are some effects of microgravity on the body?Gravity - FORCE OF attraction BETWEEN masses
Microgravity - FORCES THAT ACT ON GRAVITY ARE GREATLY REDUCED
Effect of microgravity is bone loss - 24Describe the 4 types of satellites that we studied. What is geosynchronous orbit?Research & Observation - Weather- Look at the weather _ used to FORECAST WEATHER
RESEARCH-AlSO BE USED TO TRACK SHIPS AT SEA, FOREST FIRE, SOIL QUALITY
Communication- Used for phone signals - CREATE CLEARER TRANSMISSIONS _ MAKE MANY USERS POSSIBLE
Remote Sensing - senses waves like heat and OBSERVES EARTH & SEND INFO BACK TO EARTH WITHOUT TOUCHING
GPS- used to find you location
Geosynchronous Orbit - Eg Weather satellites - satellites are assigned to one place they follow that one spot matching the speed of Earth's orbit. - 25Optical telescopes - what are their advantages and disadvantages? What are the differences between refracting and reflecting telescopes?A - Don't take up a lot of space
- clear images
D-Cost
- size limit
- limit to how far we can see
-BLOCKED BY WEATHER
Refracting - Use lenses
-LIMIT TO HOW POWERFUL THEY CAN BE
Reflecting - Use mirrors and lenses
- Spin casting
SEGMENTED MIRRORS (lots of mirrors into one big mirror) - 26What are the advantages of the Hubble Space Telescope?Not affected by weather
Closer to objects - 27How are radio telescopes different from optical telescopes?Radio- Need a lot of space
- Need radio silent zones
-No limit to what we can see
- USE RADIO WAVES
NOT AFFECTED BY WEATHER
USED NIGHT AND DAY
Optical- Not a lot of space needed
No radio silence needed
Limit to what we can see
USE VISIBLE LIGHT
BLOCKED BY WEATHER
USED MOSTLY IN THE NIGHT - 28What is the technique known as interferometry?Combining one or more telescopes to create a clearer image
- 29What is spectroscopy? What does it tell us about stars?Is the study of the absorption & emission of light
Tells us the **composition** of stars - 30Red-shift, blue-shiftRS- Moving away from Earth
BS-Moving toward Earth - 31What do parallax and triangulation tell us about celestial objects?DISTANCE
.........
Of celestial objects - 32What is space junk and why is it a problem?Space Junk- pieces that have fallen off rockets and are now just floating in space
Space Junk is hard to detect on Radars sometimes spacecraft can crash into them - 33Identify some issues related to space exploration using these categories: economic, political, ethical, environmental.Economic Who will pay
Political - Who owns space
Ethical - WHY NOT EARTH PROBLEMS FIRST
Environmental- WHO NEEDS TO MAKE SURE SPACE ENVIRONMENTS DON'T GET HARMED - 34What is your opinion on future space exploration?COMPLICATED
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- Descripción
- Flash Cards for ALL of Unit E (Unit E exam)
- Creado por
- Savanna Jewison · mar 2022
- Actualizado
- 8 mar 2022
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