Weather Science

We launched Unit 3 with an overview of how to make sense of the various types of weather maps used to predict weather.

To help connect the concepts of temperature, volume, and pressure, we began by watching Kevin Delaney performing on Jimmy Fallon:

The Lesson 49 PowerPointLesson 49 Worksheet, and the Weather Variables handout are available for download.  For more information about the jet stream, check out the short video below:

For weather forecast data, visit the University of Washington Atmospheric Sciences Virtual Map Room.  Lesson 49 textbook questions 1-6 were assigned as homework.

Yellowstone Food Web

To conclude our work this week, we will assemble a food web of as many species as we can based on the research students did over the past few days into abiotic factors, biotic factors, and populations data.  Important vocabulary we will use to build our food web includes node, edge, and energy flow. Class notes are pictured below:

IMG_1690

For your assignment today, construct a food web using the biotic factors in your Google Doc.  On the sticky note provided, write down population data for 2-3 species in Yellowstone and turn in to Mr. Swart.  We will use the class population data along with the food webs from today to dig further into the concepts of trophic cascades and carrying capacity next week.


Combined student-researched data to be used for constructing food webs:

Species Population Mass (kg)/organism Population mass (kg)
Peregrine Falcon 9 1 9
Bald Eagles 14 5 70
Wolverine 7 20 140
Canada Lynx 112 10 1120
Cougars 25 80 2000
Grey Wolves 104 34 3536
Beaver 500 23 11500
Mountain Goat 208 100 20800
Pronghorn Sheep 466 55 25630
Bighorn Sheep 328 100 32800
Black Bears 650 110 71500
Mule Deer 1850 45 83250
Grizzly Bears 610 300 183000
Moose 400 800 320000
Bison 4000 630 2520000
Elk 20000 275 5500000

Our work today is to find the mass (Google the mass of each species – look for grams (g) or kilograms (kg)).  Copy and paste the table into Google Sheets.  Fill in the mass of each organism (convert to kg) and then calculate the mass of each population using the formula in the population mass column.

Yellowstone NP Geology and Ecosystem

Yesterday we learned about the connection between the biotic (living) and abiotic (not living) factors in the ecosystem of Yellowstone National Park.  Wolves, deer, and trees are all biotic factors and connect together into a food web.  Soil, rocks, and rivers are all abiotic factors that are influenced by the activity of the food web.  Our work over the next two days is to research additional biotic and abiotic factors in the Yellowstone ecosystem, and to collect as much data as possible.  We need numbers!

Browse through the sections of the Nature & Science page on the Yellowstone National Park website.  Be warned – there is a ton of information! Your goal by the end of tomorrow is to come away with a deeper understanding of both the geology and the ecosystem of Yellowstone.  Record as many facts as you can find about biotic and abiotic factors in your Google Doc.

Biotic Factors

Find specific population numbers for as many species of plants and animals as you can and record the data in your Google Doc.  Cross-reference your list with the biotic factors you listed out yesterday.  For example, there are an estimated 10,000-20,000 elk in the park.  Be sure to read and take notes about the wildlife, plants, and life in extreme heat residing in Yellowstone.

Abiotic Factors

Read about the Geology of Yellowstone Park, taking notes about key geologic features (example: Old Faithful geyser) and how they form, along with important historic geologic events and when they occurred.  Be sure to read the following sections:

Wolves in Yellowstone

Old Faithful Live-Stream

Now that we have a plan to virtually travel to Yellowstone, we set our sights on the ecosystem of the park.  For today’s lesson, students will learn about how the reintroduction of wolves nearly 75 years after their extinction appears to have led to profound changes to both the biotic (living) and abiotic (not living) factors in the ecosystem of the park.

The video (below) features images about the wolves and other organisms in Yellowstone, with George Monbiot narrating.  The narration is actually a segment from a longer TED talk by Mr. Monbiot.

During the video, make a list in your Google Doc (from yesterday) of the biotic and abiotic factors you see in Yellowstone.  After watching the video, write down the claim being made by the narrator in their Google Doc, and then make of list of evidence used to support the claim.  Next, students are must read an article titled Has The Reintroduction Of Wolves Really Saved Yellowstone? published on March 14, 2014 by Emily Gertz in Popular Science.  After reading the article, write the counterclaim in your Google Doc and include evidence from the article to refute the original claim.

Finally, create a list of information you would need to determine whether or not wolves have impacted the ecosystem of Yellowstone National Park.

After completing the lesson, continue working on your virtual road trip plans from yesterday’s lesson.  Be sure to share the Google Doc with Mr. Swart!

Finding Yellowstone

As we enter our final unit of the year, it’s time to have some fun!  We will begin our ecosystem unit by planning a virtual road trip to Yellowstone National Park.  Working with a partner, create a Google Doc and include your responses to the following tasks:

  1. Plan your route: Map how you will travel from Burien to Yellowstone and back.  Where will you stop along the way and why?  How many miles long is the trip?  Neat places to visit:
  2. Pick your ride: How will you get there?
  3. Expenses!  Research the following:
    • How much money should you budget for gas?
    • How much money will you budget per meal?
    • How much money will you budget for lodging?
    • How much is the Yellowstone Park entry fee?
    • Any other expenses you should budget for?  Souvenirs?
  4. Yellowstone National Park highlights:
    • Research the natural wonders of the park!
    • What are five things you absolutely must see while at the park?

Titration

We followed up our work yesterday with the Lesson 89 Titration Lab.  Students received the Pre-Lab 89 Titration which we read through as a class.  Students then took a few minutes to complete Pre-Lab assignment questions 1-4 which we briefly discussed.  Students assembled into groups of 4 and worked through the lab.  A picture of one group’s neutralized tubes is shown below, followed by results for periods 2 and 3, as well as combined results.

 Period 2 Number of drops of NaOH
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 20 10 10 10 11 14 13
HCl Solution B 20 25 20 19 18 18 20
HCl Solution C 60 56 61 62 56 69 61
 Period 3 Number of drops of NaOH
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 14 15 12 14 19 9 14
HCl Solution B 25 27 23 18 27 27 25
HCl Solution C 54 60 80 73 75 63 68
 Combined Number of drops of NaOH
Period 2 Period 3
Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Team 1 Team 2 Team 3 Team 4 Team 5 Team 6 Average
HCl Solution A 20 10 10 10 11 14 14 15 12 14 19 9 13
HCl Solution B 20 25 20 19 18 18 25 27 23 18 27 27 22
HCl Solution C 60 56 61 62 56 69 54 60 80 73 75 63 64

[H+] and pH

We elected to take our time working through Lesson 86.  We started the week with the Lesson 86 PowerPoint, connecting molar concentration of H+ or OH- with pH.  Students then transitioned to the Lesson 86 Worksheet, working in teams to sort through the Acid-Base Solution Cards used in Lesson 85.

On Wednesday, we powered through the Lesson 86 lab, collecting pH data from 10 different solutions.  Students did a fantastic job preparing concentrated stock solutions, diluting stock solutions, and measuring pH with our one functioning digital pH probe.  Results from both classes are shown below, with second period results in green and third period results in red.

On Thursday, class began with students completing the Chemistry Textbook Pilot Student Survey.  After the survey, we returned to the pH lab, analyzing our results in the context of a set of class notes (pictured below).  We also practiced calculating pH from molarity and molarity from pH.  Students were reminded that Google Chrome can be used as a calculator.  Desmos.com offers a nice web-based scientific calculator as well.

We ended the week on a lighter note, celebrating National Teflon Day (April 6) with videos (and notes) about acids and bases that are so strong, their activities fall outside the traditional 0-14 pH scale.


Some additional videos that might be helpful:

Dude!

Paleontologist

Paleontologist

Directions:

  • Individually: Read the Interview with a Paleontologist and jot notes in notebook (what does a paleontologist do?).
  • Team: Geologist use an indirect method of dating rocks and fossils called stratigraphy. Stratigraphy is the study of strata on earth. Strata are layers. For this task, you will study a model of earth’s strata.
    • Observe the beaker of strata provided by Mr. Swart. Which layers are the oldest (has been in the beaker the longest)? If these strata were layers in the earth’s surface, what inferences might you make about the relationship between the depth of the layer and the amount of time that has passed? Answer in notebook.
    • Consider the three colored markers in the strata. If you found these colored markers in earth’s strata, which would you infer to be oldest? Answer in notebook.
    • Get the 3 colored envelopes from Mr. Swart. Each envelope matches to 1 of the colored markers in your strata.
    • Imagine that each envelope represents a fossil discovery. Which “fossil” would be the oldest? Which would have formed most recently? Answer in notebook.
    • Open the envelopes and observe the fossil pictures in each. In your journal, compare each fossil with each of the others and with modern-day organisms. What similarities and differences do you observe? Answer in notebook.
  • Individually: Complete the Pangea Gizmo (every student individually) to see how the tectonic plates affect fossils.
  • Individually: Read and take notes on the article in the packet “Explainer: How a fossil forms” and the Carbon dating activity. Answer in notebook.
  • Team: Create a poster that you can use to explain to your classmates of how fossils form and how they can be dated. Poster presentation must include the following:
    1. Description of their career
    2. Fossils
      • How fossils form
      • How fossils are dated
      • How fossils are important evidence for change
    3. Plate Tectonics
      • What it is
      • How does it contribute to theory of evolution