This blog is a collaborative place for 8th grade earth scientists to share their written responses to our end of unit assessment questions on plate tectonics. Students: please first post your question, followed by your written response.
Friday, March 14, 2008
laser range finder's
Laser range finder’s, are used in C.A on the San Andreas Fault. Laser range finders are useful fore measuring the slightest movement between two points that are widely separated from each other. This is how it works two stations are mounted on the opposite side of a fault line. One station has a reflector. A pulse of laser light is sent to the reflector station, witch sends the pulse back to the sending station. The atomic clock is used to measure how long it took for the light to travel to the reflectors and back. Light travels at a velocity of 186,000 miles per second knowing that it is a matter of simple arithmetic to determine exactly how far the two stations are from each other. Weeks and months later additional measurements are made and if any movement along the fault has taken place to move the two stations closer to each other or farther than they where the time it takes for the laser pulse to travel back and forth will be different. The difference in the arrival times can be converted to a precise measurement of how far the land beneath has moved. Laser range finders can detect a change of only one fifth. I think that this is a good thing to have because one I like to know if the ground is moving two its kind of cool to know.(CH 4)
i love u r paper
ReplyDeleteThere are quite a few grammar, spelling, and punctuation mistakes and it could be a little longer.
ReplyDelete-ASu4
I like your paper but it could use some work with the length a little bit and the spelling and grammar errors.
ReplyDeleteEB4
its got really good info, but you might want to spilt it into three paragraphs (intro, body, and conclusion...)
ReplyDeletei liked it nice job
-mmb 4th
this could be a little longer but good job:)
ReplyDeletems4
Great job with defining laser range finders. Good Work! GG4
ReplyDeletethe first comma is unnecisary and you spelt for rong, other then that it is rightous!
ReplyDeletemany grammer mistakes!
ReplyDeleteNR5
Your paper is good it had a lot of information that I didn't know before.It has a few problems but I still love it.
ReplyDeleteKP5
It had good information but the length could be lenghtened. Such as an introductin or a conclusion.
ReplyDeleteML5
Its kinda intresting but i knids think you left it hanging. Good job so far MR.5
ReplyDeleteyour paper is asom. i thaught it was so good i couldent stop reading it over & over.
ReplyDeleteit was ok like some one else said here was a few mistakes but other wise it was cool!!!jg5
ReplyDelete