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Science Quiz 5/25/11
| Question | Answer |
|---|---|
| Who is Ptolemy? What did he do? | Egyptian astronomer, came up with geocentric model, ancient greeks agreed |
| Who is Galileo Galilei? What did he do? | Italian scientist,proved heliocentric model using a telescope |
| Who is Nicolaus Copernicus? What did he do? | Polish scientist,revived heliocentric model |
| Who is Johannes Kepler? What did he do? | German mathematician, discovered orbit of a planet around sun is an ellipse (oval) |
| Heliocentric model | Sun is in the middle, earth and planets revolve around it |
| Geocentric model | Earth is in the middle, sun and the planets revolve around it |
| Ellipse | Oval shaped, shape of orbit of a planet around the sun |
| Space-probes | Unpiloted vehicle, carries scientific instruments into space & transmits information back to earth |
| Spacesuit | Allows people to live in space |
| Spaceshuttle | Reusable space vehicle that is launched like a rocket & lands like an airplane |
| Spacestation | Permanent lab designed for research in space |
| Satellite | Have a clear view of space, fly high in space |
| Au | Astronomical Unit, measures distance from earth to sun |
| Mercury | 0.4 au |
| Earth | 1.0 au |
| Venus | 0.7 au |
| Mars | 1.5 au |
| Jupiter | 5 au |
| Saturn | 9.5 au |
| Uranus | 19 au |
| Neptune | 30 au |
| Pluto | 40 au |
| Gravity | The attraction between any 2 objects because of their masses, keeps planets in air |
| Inertia | The tendancy of an object to resist a change in its motion, makes planets go in straight line |
| Moon | Always see same side of the moon,low gravity, variations in temp., water in poles |
| Spring tide | Need moon in a node, full & new moons, change between high and low tides is the greatest |
| Neap tide | Need moon in a node, 1st and 3rd quarter moons, change between high and low tides is the least |
| Lunar eclipse | Sun, earth and moon...occurs when earth casts a shadow on the moon |
| Solar eclipse | Sun, moon and earth...occurs when moon casts shadow on portion of earth, large umbra |
| Solar nebula | Large thin cloud of dust and gas |
| Planetesimal's | Asteroid-like bodies that collided to form planets (accretion) |
| Protoplanetary disk | Large disk cloud of dust and gas |
| Protoplanets | Moon sized planetesimals |
Created by:
NATWEST
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