First, I would like to say I miss you and I am sorry that I can't be there today and I missed yesterday. However, test is still Thursday.
Yesterday you were asked to get your notes in order if you haven't already and to have one question of the day for me today. Here is your opportunity to ask me that question.
In addition to that, you are now assigned one response to one other persons question, but don't stop there. There more questions you try to answer the better shape you will be for the exam.
Remember, this exam is about our Changing Earth:
The big idea to learn is how does the Earth change?
Chapter One: What changes occur inside the Earth and how do we know?
Chapter Two and Three: How do those changes below the surface affect the surface causing change?
Chapter 4: How has the Earth changed over time?
Chapter 5: How are we changing the Earth today and what can we do to reduce these changes?
36 comments:
WOW! You see the time this post was...posted? And this was my first chance to get some sleep tonight. Thats how much I care.
Bring on your questions.
So were do rubber tires go after you pay someone to get rid them?
So what happens when things like refrigerators get thrown away?
if we send a sismic wave through the earth can people on the other side of the earth
How does some thing get recycled?
Could solar panels eventually replace asphalt and concrete?
sorce http://science.howstuffworks.com/environmental/energy/solar-panel-highway.htm
What are some examples of how we know what is inside the earth? Why are these questions on the blog so confusing?
Where can we get the QOTD?
Josh,
can people on the other side of the earth...what? read it with seismographs?
Cole,
Nice copy and paste. A student last year had a presentation on putting peizometers in the road so that everytime a car rode over them it generated energy. I don't know that we can afford all roads turned into solar panels. Sounds breakable the way that some people drive
Moses,
Why are your responses so confusing? Examples of how we know whats in the earth can be found here.
When you want to find a half life you take days over what to equal what again? I have it in my notes but I don't fully understand it.
Mandi,
Good question. Best answer would be they are in your notebook with dates and your final answers.
Next best answer would be they can be found on this blog. On the front page in the top left tab is a search for this blog, type in Grade 8 and you will see all teh Grade 8 posts for each week and the questions of the days those weeks.
Another answer would be you know the test questions because you just went over the test.
Michael
I think Stu did this one for week 7
The top is all you need to know for now about half life
Jonell well I think that if you got rid of a rifrigerator I think they would take apart it at take out the metals and things that can get recycle and then they would crush the parts that can't get recycled and they would give it to some one And then the nonrecyclable parts would parobally go to a landfill or something.
Julanna well with the tires they would probally just give them to someone an they would probally put them in a landfill because they give off alot of pollution and things.
When things get recycled nick they are taken to the plant an once they are there they get melted down and flattened into sheets of either aluminum or whatever you recycled. Then they get put into stores or whatever else it would go to be uses
How do solar pannles get recycled after they get used?
Have scientists tried alot to get to the center of the earth? Has it been done?
What is fossil dating? I know that jack explained it.. Very nicely... But I am still kinda confused.
Kate,
Nope and nope.
Since it gets hotter and more molten as you go threw the crust, we know that we cannot drill down there.
But, we have tried to see how far we can go.
12,262m is a smidgeon above 7.5mi.
Cara,
Good question. You take a small sample and "see" what chemicals are in it.
You compare radioactive chemicals to the decayed elements they become to find a ratio.
That ratio will give you a length of time.
Some down sides, this only works with igneous rock and original remains.
Sedimentary rock and the fossils found there a made of radioactive and decayed particles that began their decay before that rock or fossil were laid down.
Is it possible for people to feel earthquakes a cross the world
Are earthquakes the worst natural disaster
How many pages are there on the test and is it hard?
has anyone thought of a way
to use snow as a resource?
Julianna I think or jonell lol with thetires when they are done being used hey can get recycled by putting the in parka and also using them on football fields too. Everything doesn't just go in a landfill right away.
How many era are on the geologic time scale. Thing are recycled by going to a plant and they separate the paper with ones that have a lot of ink to ones that have little to nothing win ink on it. And then they put it in a machine and then the machine takes all of the ink away from tue paper. And then the machine takes all of the paper and then the machine will make new peices of paper. And that's how they recycle paper at a plant.
How do we use fossils for evidence for the geologic time scale?Doesn't it involve index fossils?
The useful metal is then taken out of the refrigerator and everything recyclable @jonell
Cecka,
Many and yes.
Michael, figuring out a half-life is also the same as asking the question "How much chemicals are left in the fossil?" This can be figured out by using radioactive dating.
When trying to figure out the exact age of a fossil, you must know that the more radioactive the fossil is, the younger it is. You must also understand that uranium eventually turns into lead. The fossil's half-life can be determined by the radioactive amounts.
Heres an example: Pretend it takes 1,000,000 years for one-forth (25%) of the fossil to decay. Well,1,000,000 years go by and what do you know?! 25% of the fossil has turned into lead. That means that after the first 1,000,000 years of that fossil's life, one-forth has decayed. This means that only 75% of uranium remains and 25% of the original 100% of uranium has gradually turned into lead.
1,000,000 years pass slowly and steadily for the abandoned fossil. Now that 75% of uranium has shrunk again. Like last time, 25% of the original number turns into lead. One forth of 75% (18.75%) turns into lead. This means that the lead amounts have increased to 43.75% and the uranium levels have decreased to 56.25%. As uranium levels decrease, lead levels increase. The one forth that is taken away or subtracted, from the uranium adds to the lead amounts. Over time, uranium levels will be smaller than the lead levels, even though the uranium levels were higher and the lead levels were smaller.
Which brings me to my question. Is this a good enough answer for the test? Or does it need to include more?
I was sick today, so what are the questions? Also,about how long is a good answer? Like one paragraph or two? Are the questions you listed the test questions? And when things get sent to be recycled, they are separated into usable things and things that can't be used anymore. Then the ones that can be used get melted down to make something else.
How do you find halflife? I'm with rachel, I'm confused. haha
What are the layers of the Earth from the inside out?
how do soler pannels work?
How do we know how a time period in the geological time scale looked like back then?
Well in response to Nick Caspers question something be recycled by remelting it back into the same item it was before you threw it in the recycle bin.
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