Showing posts with label Earth Science. Show all posts
Showing posts with label Earth Science. Show all posts

Monday, August 13, 2012

Into the Ocean

Several years ago, I started teaching earth science. Like so many teachers, I tried to fit everything we could possibly know about earth systems into 180 days. I was overwhelmed and my kids left shell shocked. The vocabulary alone sent more than one student into tears.

When we transitioned to a trimester schedule, I convinced my administration to let me break out my earth science into its components. So now, I have Geology, Meteorology, Astronomy and Ocean Science as separate classes. The plan was to add in an Environmental Science and Climatology in a couple years, but a series of scandalous events found Chemistry taking up all my "extra" time slots.

Ocean Science has turned into my biggest challenge yet. As it turns out, not too many teachers have a separate elective entirely devoted to the subject. This has made it a little more difficult to collaborate and find out what works best. That and my limited knowledge of the ocean doesn't help either.

I live a short drive to the geographic center of the (contiguous) United States, and as a result, am about as far away from any ocean that you could possibly get. As you might guess, many of my kids have only seen an ocean in pictures and have no real concept of its splendid enormity or it's important impact on them.*

This puts my kids in a pretty unique position when they walk in my room. For one thing, this isn't something they have ever really learned about. There is no review in my class; everything is new. The flip side of that is that everything is new and pretty darn interesting.

I have had this class for a couple years now and am at least a little more familiar with the material. This is my year of the ocean and my plan is to really think about how to approach it. This has been a lecture class for the most part with some labs thrown in. Makes me want to cry. Ideally, I would like to use more of a modeling approach and have kids discover these ideas through observations and data interpretation. Again, without an actual ocean, that makes it a little more difficult.

So I started with my standards. Then I rearranged them. Then I rewrote them. I am sure they will change before the year is out. I need a new verb as there is a whole a lot of describing going on. I am finding it much more difficult to write standards for my earth sciences. These classes are based more on big ideas than skills and so the target for assessment doesn't seem to be as cut and dried, as well as a lot more subjective. At the same time, this makes for wonderful opportunities for students to connect ideas together.

One concept I don't have written up yet is Humans and the Ocean. I want kids to make connections between how humans impact and are impacted by the ocean. I have an idea that this will sort of be like a capstone for each unit, but haven't really fleshed out a plan for that yet.

So, here's what I got...

Unit 1 Water Movement
Currents
1.       I can describe the relationship between global wind patterns and the horizontal and vertical circulation of the oceans.
2.       I can explain the causes of El Nino and La Nina and their effect on world climatic patterns.
3.       I can describe the effects of upwelling and downwelling on various populations.
Waves
4.       I can distinguish between deep-water, shallow-water and transitional waves.
5.       I can describe the process of refraction as it relates to coastlines.
6.       I can describe the effects of storm surges and tsunamis.
7.       I can use the equilibrium theory of tides and the dynamical theory of tides to describe diurnal, semi-diurnal and mixed tides at various locations on Earth.
8.       I can explain how the Moon-Sun-Earth alignment affects tidal patterns.
9.       I can describe why tidal bores, ebb and flood currents and maelstroms may occur.

Unit 2 Water Properties
1.       I can recognize the factors that affect the density of seawater.
2.       I can describe the factors that affect the salinity of ocean water.
3.       I can predict and explain the changes in salinity, density and temperature of the ocean at different depths and latitudes.
4.       I can describe the significance of dissolved nitrogen, oxygen and carbon dioxide.
5.       I can describe the molecular structure of water and relate it to the properties of water.

Unit 3 Productivity
1.       I can list and describe the marine classifications by light in terms of wavelength penetration, photosynthesis and bioproductivity.
2.       I can contrast the bioproductivity of the tropical, mid-latitude and polar oceans in terms of temperature, density, accessibility, upwelling and nutrient availability.
3.       I can describe the pelagic and benthic zones in terms of depth, proximity to shore, photosynthesis, key physical factors and limiting factors.
4.       I can describe the coral reef environment in terms of key organisms, bioproductivity, physical factors and key limiting factors.



If anyone out there does something similar, or if you know of someone who does, I would love to hear from you.



*I had a plan to take my kids to the ocean as part of their final. My principal laughed until he realized I was serious.

Thursday, August 12, 2010

Geology Targets

Well, it took me awhile, but I finally got everything moved upstairs. I still have two lab stations that are buried underneath homeless STUFF, but I am feeling much better about this.

I actually have to go back to school tomorrow. Thank goodness it is a workday and I can get settled in. During the summer, I didn't really feel like time was going fast, but now suddenly it's time to go back and I don't know where my vacation went.

Oh wait, I took a class and moved my STUFF.

I have focused mostly on chemistry this summer and almost forgot that I was going to teach a section of Geology this fall. I had written out a draft of targets for that class earlier in the summer that mostly consisted of chapter objectives in three different textbooks. It was a starting place, but I set about coming up with my critical targets.

I ended up with 67 standards.

This was so unmanageable that it was almost funny. Teaching a geology class can take kids in many different directions. Do you want to focus on historical? What about river systems? Glaciers? Deserts? Volcanoes? To be honest, I am not sure which direction I want to go. This will be (and has been) a big challenge for me when writing the class.

So I have narrowed it down. I am not sure I am happy with this list, but I will focus on these targets this year and edit as necessary.

Geology
1. Interpret elevation and topography of an area using topographic maps.
2. Interpret information shown in a geologic map.
3. Use seven main physical properties to identify pure minerals and minerals within a rock.
4. Summarize the rock cycle.
5. Describe the formation of the various textures of igneous rocks.
6. Identify and describe the formation of various types of igneous extrusions.
7. Classify igneous rocks.
8. Classify sedimentary rocks.
9. Describe the depositional environment based on the characteristics of a sedimentary rock.
10. Classify metamorphic rocks.
11. Identify the three agents of metamorphism and the changes they cause.
12. Compare and contrast contact and regional metamorphism.
13. Describe the process and limitations of radiometric dating.
14. Determine the relative ages of rock formations.
15. Compare the three types of unconformities.
16. Identify the major geologic and biologic characteristics of the Precambrian, Paleozoic, Mesozoic and Cenozoic eras.
17. Identify and describe the three types of plate boundaries.
18. Describe the causes of plate movement.
19. Describe the three main types of folds.
20. Compare the structures formed at the three types of plate boundaries.
21. Use earthquake data to construct an Earth cross-section.
22. Relate earthquakes, volcanoes and plate boundaries.
23. Describe the three types of volcanic cones.
24. Explain how rock composition, surface area, climate and topography affect the rate of weathering.


Did I miss anything critical?

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