science 8 rev
DESCRIPTION
A virtual field trip about the effects of gravity.TRANSCRIPT
SCIENCE 8VIRTUAL FIELD TRIP
Ms. Miller
Earth is only a small part…
http://www.google.com/earth/ , type in the school’s address and take a little trip from outer space to Braxton County Middle School.
There is so much more beyond where we live. Let’s investigate what’s out there.
Where are we going to go…
First we will look at what is being effected by the Earth’s gravitational pull.
Comets, Asteroids, Meteoroids, Oh My…
Gravity has an effect on many things outside of our atmosphere.
Comets Asteroids Meteoroids Let’s learn how the Earth’s gravity pulls
them in and the difference between them.
Comets
Comets – Overview A comet is an object in space that is made up of dust and
rock particles mixed with frozen water, methane, and ammonia that forms a bright coma as it approaches the sun.
Comets orbit the sun. Some comets inhabit in an area known as the Oort Cloud which is far beyond the orbit of Pluto.
Occasionally a comet streaks through the inner solar system; some do so regularly, some only once every few centuries. Many people have never seen a comet, but those who have won't easily forget the celestial show.
Comets
Famous Comets Let’s explore. http://amazing-space.stsci.edu/resources/
explorations/cometmyth/lesson/facts/Fact6/index_nf.html
Asteroid vs. Comet
The main difference between an asteroid and a comet is what they are made of.
Asteroids are made up of metals and rocky material. Comets are made up of ice, dust and rocky material. Both of these space objects were formed during the
earliest times of the solar system, around 4.5 billion years ago.
Asteroids formed much closer to the Sun, where it was too warm for ices to remain solid.
Comets have tails and asteroids do not. Why do comets have tails? Comets formed farther from
the sun where ices would not melt. Comets, which approach the Sun, lose material with each orbit because some of their ice melts and vaporizes to form a tail.
Asteroids
Let’s watch a video of asteroids. . . . http://www.space.com/51-asteroids-forma
tion-discovery-and-exploration.html
Meteoroids
A meteoroid is matter revolving around the sun or any object in space that is too small to be called an asteroid or a comet.
A meteor is a meteoroid that buns up in Earth’s atmosphere.
A meteorite is a meteoroid that strikes the surface of the moon or planet.
Meteoroids
We can study meteorites that have landed on Earth. . . .
http://www.solarviews.com/eng/meteor.htm
What else does gravity effect?
Gravity effects the motions in sun-earth moon systems
Eclipses, tides, seasons http://www.solarviews.com/eng/solarsys.h
tm http://www.visuallearningsys.com/digital-
science/preview
Eclipses
Solar Eclipses
When the moon passes between the Sun and Earth, the moon is fully or partially blocked by the sun. This is called a solar eclipse.
http://eclipse.gsfc.nasa.gov/eclipse.html
Lunar Eclipses
When the Sun, Earth, and Moon are aligned (with the Earth in the middle), a lunar eclipse occurs.
The Moon passes directly behind the Earth into it’s umbra (shadow).
http://www.moonconnection.com/lunar_eclipse.phtml
Tides
http://earthsky.org/earth/tides-and-the-pull-of-the-moon-and-sun
Tides
Seasons
Science fiction or fact??
Could we colonize space? Should we continue to research space? http://www.spacefuture.com/archive/the_
ethical_commercialization_of_outer_space.shtml
Let’s discuss space exploration
http://www.spacedaily.com/ http://www.spaceref.com/news/viewsr.ht
ml?pid=30009 http://www.universetoday.com/37079/ben
efits-of-space-exploration/
Pros and Cons
Let’s discuss the pros and cons of space colonization.
http://settlement.arc.nasa.gov/Basics/wwwwh.html
http://www.debate.org/opinions/should-humans-attempt-to-colonize-space