Science Space Flashcards
Diffrent belefis (china)
People in china and india belived that the earth is flat and held up by 12 pillars
Diffrent beilefs(thailand)
People in Thailand believed that a
solar eclipse occurred when a god
called Rahu swallowed the Sun.
The wood turtle(india)
In India people believed that the
Earth was supported on the back of
a giant wooden turtle.
Describe the similarities and differences between the geocentric and the heliocentric
models.
The geocentric model says that the earth is at the center of the cosmos or universe, and the planets, the sun and the moon, and the stars circles around it. The early heliocentric models consider the sun as the center, and the planets revolve around the sun.
Big bang
The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point (13.7billion years ago) then expanded and stretched to grow as large as it is right now—and it is still stretching!
The conditions to send a satellite into orbit
Satellites are able to orbit around the planet because they are locked into speeds that are fast enough to defeat the downward pull of gravity
Orbits(polar)
This satellite go over the north and south pole in a polar orbit satellites are useful for mapping
Orbit (LEO)
There are lots of satellites, such as the international space station in Low Earth Orbit. This is an orbit below 1000km from Earth some Leo satellites go over the North Pole and south pole.
Benefits of the space programme
Health and medicene transportation,public safety,information technology
Risks of space programme
Spcae radiation,isolation distance from Earth,lack of gravity
Do aliens exist?
As there billions of stars and galaxies theres a chance of aliens existing
Exo planets
A planet orbiting a star that is not our sun
When do scientists use mathematical models
Scientists use mathematical models.these are very useful when you cannot do experiments to collect data
What is a mathematical model
As set of rules using maths or usually using a comuter that helps you predict what could happen
What does frank drake want to calculate
Working out how many planets are likely to have life on them. The search for alien life continues
SETI
Search for extra-terrestrial intellgence
Who came up with the heliocentric model of the universe
Galileo galliei
What are the required conditions for habitable Zone
Atmosphere, with oxygen water and a sutiable climate
How to find out mean
To find the mean, add all the numbers together then divide by the number of numbers.
How many planets are in the solar system
8
Why is the moon classified as a natural satellite
It orbits planet
Describe the orbit of a artifical satellite
Circullar orbit
Mars appers to move backwards across the sky name this type of motion
Retrogade motion
Scientists now believe that theory 2 is correct suggest why they might think theory 1 is wrong
New evidence
Sequence of a star much bigger than the sun
Protostar>main sequence star>red super giant>supernova>neutral/black hole
Sequence of a star the same size as the sun
Protostar>main sequence star>redgiant>whitedwarf> black dwarf
Explain how atoms of the elements helium are formed in a star
When a star becomes a red giant it fuses heluiem
Explain how atmos of very heavy elements, such as gold were formed
Heavy elements formed when a massive star collapes than explodes as a supernova fussion
Describe what happens to a star much bigger than the Sun, once the star reaches the
end of the ‘main sequence’ period of its life cycle. Your answer should include the
names of the stages the star passes through.
When a star reaches the end of the main sequence star runs out of hydrogen the star expands the star cools it forms a red super giant. supernova forms heaver elements core shrinks becoming a neutron star if mass large enough core collapses and black hole forms
How does a Refracting Telescope work?
Objective lens,focal length,eye piece
What is the major problem of the refracting
telescope?
Causes blurry image.
How does a Reflecting Telescope work?
Eye piece lens,concave mirror, flat mirror
Describe one similarity and one difference between reflecting and refracting
telescopes
The main difference between a refracting telescope and a reflecting telescope is how they magnify light from distant objects.
Similarity is both telescopes will make a small and inverted image of whatever it’s pointed at
I can suggest an observation that could not
be explain by the geocentric model.
The phases of Venus
I can explain why atoms could not be
formed immediately after the Big Bang
the universe was both too hot and too dense for elements to form.
I can explain ways in which the Big Bang
theory is supported by evidence.
the discovery in the 1960s of cosmic microwave background radiation
I can explain different techniques
astronomers use to search for possible
habitable planets.
The transit method is the most prolific, but there’s also the radial velocity method, direct imaging.
Describe how astronomers use
telescopes
using curved mirrors to gather and focus light from the night sky.
Describe two types of telescope
Refractor Telescopes utilize specially designed lenses to focus incoming light into an image for you to see with your eye or capture with a telescope camera.
Reflectors use mirrors, which causes light to reflect at various angles within the optical tube, extending the overall light path.
Describe how a Convex lens works
Convex lenses refract light inward toward a focal point.
Describe how astronomers search
for life on other planets. Include
SETI and Carl Sagan!
using radio telescopes to search for signals from other civilizations.
What is accuracy
Accuracy:The accuracy of a measurement is how close a result comes to the true value.
Precisied
Is close to the answer but not as right as the answer
Repatable result
Same person reapts the expirement and gets the same answer everytime
Reproducible
Anyone can get the same results
Resolution
Smallest reading on a thermometer
Anomly
Anomalous result: anomalous results dont fit the pattern and should be ignored and not included in the mean
