Olololol

Only available on StudyMode
  • Download(s) : 172
  • Published : December 4, 2012
Open Document
Text Preview
About how many extrasolar planets have been detected to date? a) 1-10
b) 10-100
c) 100-500
d) 500-1000
e) >1000

What is the easiest way to find planets?
a) directly imaging the planet
b) seeing the planet "transit" in front of its parent star (will be more prevalent in the future; satellites right now are looking for this) c) measuring the doppler shift of a star's spectrum lines (gravitational wobble on star) d) X-ray observations

Most of the planets discovered around other stars
a) are more massive than the Earth and orbit very far from the star b) are more massive than the Earth and orbit very close to the star c) are less massive than the Earth and orbit very far from the star d) are less massive than the Earth and orbit very close to the star

Life as we know it on Earth could only form in a "habitable zone", which is the range a) in the galaxy where there is enough oxygen
b) of distances from a star where most water is in liquid form c) of latitudes that stay warm during an ice age
d) of time when when there is no longer comets and asteroids

If a meteor impact killed the dinosaurs, it was most likely due to the resulting a) shockwave
b) shower of small, high speed fragments
c) change in the Earth's orbit, changing the Sun's intensity d) dust blocking sunlight, killing plants

–– LECTURE 20 ––
Which effect plays little role in permitting human life to flourish on Earth? a) Greenhouse gases lock in warmth; prevent icy winters
b) Jupiter protects Earth from many major comet impacts
c) Ozone protects us from ultraviolet radiation
d) The Moon protects us from most cosmic rays

–– LECTURE 21 ––

Which of the following could cause a meteor shower?
a) A meterooid hits a cloud in the atmosphere and creates a thunderstorm b) Earth crosses the debris filled orbit of a comet
c) Asteroids in the same orbit as the Earth
d) A small constellation of dying stars disintegrates

The energy emitted by the sun is produced
a)...
tracking img