Wednesday, September 17, 2014

Week 3 and 4

I feel like this needs celebrating...

We have AIR CONDITIONING!

Technically, it's at 50% functionality right now, but that's far better than 85 degrees with 100% humidity in my class every day.

Week 3 began our first official unit that wasn't process-centered: The Flow of Energy.

Monday:

We used a foldable to help us learn our unit vocab. We spent about 10 minutes discussing the words together before I set them free to do their foldable. They were very familiar with this vocab, so I didn't want to spend an eon discussing it. I handed everyone two of the following...


If you google vocabulary foldable, this is the first link that comes up. It actually comes as a front/back page, but I wasn't yet proficient enough at front/back printing with our old risograph printer when I printed this, so I simply gave them a one-sided sheet.

The kids wrote the word and drew a picture on this front side (yes, they had to color).
They wrote the definition on the back side in the right hand column (on the reverse of where their name/date is).

Tuesday: Photosynthesis
I used a prezi to outline the ingredients, products, and process of photosynthesis.
http://prezi.com/opfbxgq8yqdv/photosynthesis/

The kids had a similar-looking notes page which we taped into their journals.




They took a few notes on this page as we went through the prezi.
Bottom right: Roots-absorb H2O/Water (filled in the molecule with HOH)
Trunk: Xylem-tubes that carry water from roots to leaves
Top Left: Leaves take in CO2/Carbon Dioxide (filled in the molecule with OCO)
Top Right: Glucose=Sugar C6H12O6

After the Prezi, we did an activity on the back of this sheet.

The kids were broken up into groups and given a baggie with centimeter cubes in it (because I lack snap cubes). The bag had 12H (red) 6C (orange) and 18O (blue).

I told the kids that the top 6 molecules were H20 and they filled those in. The next 6 are CO2, and they filled those in as well. We discussed how these, plus sunlight, are the ingredients in photosynthesis.

They had to build 6 water and 6 carbon dioxide molecules using their cubes.

Once they had that done, we labeled the Glucose molecule at the bottom. They broke apart their ingredients and made the glucose...and figured out what they had left over (Oxygen).

I had a number of Ah-Ha! moments when they realized that THAT is how trees give off oxygen!


Wednesday:
We played catch-up on a lot of things that we'd fallen behind on. We taped a few pages into our journals, finished up some lesson review pages out of our (Consumable) textbooks, and studied vocabulary

Thursday: Stomata Lab
I used my (semi) free time on Wednesday to set up their stomata lab. I had intended for them to do the setup but we needed Wednesday to catch up. Plus, as I discovered, the peeling of nail polish off of leaves is rather tricky.

The stomata lab exists in different versions. I decided to do it this way:

1. Paint a swab of clear nail polish on the underside of a few leaves (still connected to the plant).
2. Wait for polish to dry (this requires a lot of patience)
3. CAREFULLY peel the polish off and place it on a microscope slide...add cover slip
4. View on low>medium>high power and draw stomata

My original intent was to have them view stomata from a plant that had been in the dark, and some from a plant that had been in the light. However, I must have removed the "light" plants too early from the outdoors as most of their stomata were still closed. I wanted the kids to see both open and closed and compare them, but apparently I get to work too early *overachiever*

Still, they had fun, and got a better understanding of what a stoma is.

Friday:
The kids took their Vocab Quiz.
After, we talked about producers, primary/secondary consumers, and decomposers. We practiced picking them out of sample ecosystems (desert, arctic, and forest).

Week 4

Monday: Compost Lab
The kids were split into 4 groups, and each had a 2 liter bottle, potting soil, salad (from the school lunch on the previous friday, kept in my fridge over the weekend), apples/oranges (also from friday's lunch), and some plants from my garden (that my mother had pulled over the weekend).

They layered the ingredients in the following order (top layer on top, bottom on bottom)
Soil
plants
soil
apples/oranges
soil
salad
soil

My compost bottles from 5 weeks ago are looking great! They're almost completely composted. Here's a pic lab station 1's bottles



Tuesday: Food Chains
We spent the day talking about food chains.

I had the kids set up a page in their journal for all of this week's notes. They divided a page into thirds. One per day we spent talking about this stuff:
1. Food Chains-show the flow of energy from one organism to another
[   ] > [   ] > [   ]
The kids filled in the boxes with Producer, Primary Consumer, Secondary consumer.
We took a few minutes to point out what the arrows mean. I had seen a STAAR question about that and wanted to drive that point home. They DO NOT show you what is eating what. They show the direction of the flow of energy!

Wednesday:
2. Energy Pyramids-show the amount of energy that is transferred from one level to another
We drew an energy pyramid, filled it in with Producer, Primary Consumer, Secondary consumer. We talked about the 10% rule.

To help them visualize it, I separated 500 centimeter cubes into bags. I used the C-scope 10% rule activity sheet as a guideline. I showed how much energy goes to the following:
Unused sunlight 20% (yellow cubes)
Photosynthesis: 30% (green cubes)
Reproduction: 30% (red cubes)
Respiration: 10% (blue cubes)
Stored in body: 10% (passed on to primary consumers) (45 white cubes, 5 black)

We talked about where that 90% energy was going, and how the 10% is what we'd get if a rabbit ate the plant. We then took it one step further.
Now that the rabbit has that energy (50 cubes)...
10% respiration
20% digestion
30% reproduction
30% movement
10% stored (passed onto secondary consumers) (5 cubes left)

The kids were shocked at how much energy is lost along the way!

Thursday
3. Food Webs
We're discussing this tomorrow. After, I plan on having them making a food web poster, using whatever animals and plants they want. I'm going to ask for 2 producers, 3 primary consumers, and 3 secondary consumers, plus 1 decomposer. They must have their web labeled and colored.

They'll finish these up on Friday.

It's 7:30 on a Wednesday and I'm just about ready for bed. Ms. Kat is pooped! And sore from Drill Team practice yesterday = )

Peace, Y'all
Ms. Kat

Saturday, September 6, 2014

Week 2

Has another week already gone by? I think someone must be tampering with the time/space continuum.

This week was a little rougher than the first. The excitement over starting school has worn off, and the kids are settling into their 'oh we're going to be here for a loooong time' mentality. They're a little more grumpy this week.

As a department, all 3 science teachers decided to devote this second week to the Scientific Method. We thought this might be a good idea to prevent us from having to introduce it each and every time we do a lab.

Monday (holiday)

Tuesday- We covered Empirical Evidence, and scientific Explanations using our textbook. We also talked about good and bad sources (books, websites, journals, blogs, etc).

Wednesday- We discussed what Scientific Laws and theories are. We used a set of self-made cards with different laws and theories on them, and the kids had to sort them into stacks. We made a venn diagram in our science notebooks to compare and contrast the two. We also talked about what models were, and looked at the benefits and limits of using them.

We watched this mythbusters clip and the kids picked out the benefits and limits of the model they used. https://www.youtube.com/watch?v=Cu0uNPFCf68

Thursday- The kids designed an experiment to test how plant seedlings responded to light. The kids already knew that plants grow toward light. The purpose of the lab was to teach scientific method, to make them actually go through the steps.

I had the kids bring in small cardboard boxes (shoe boxes, cereal, cake mix, snack bar boxes) and I grew about 30 cucumber seedlings in plastic baggies. The seedlings were planted about 1 week before the experiment, and most were about 7 inches tall by this time. I transferred them to cups to separate them and help them stand up.

The kids were tasked with cutting a hole somewhere in the box and positioning their plant-in-a-cup.

I had them write up their lab like this:

Plant Growth Lab

Hypothesis: If _____________ then ______________________.
"If we place a seedling inside a box, with only one hole where light can enter, then the seedling will grow toward the light."
(I ask my kids to use If, then statements for their hypothesis)

Materials: small box, cucumber seedling, plastic cup, scissors, sunlight

Procedure:
1.
2.
3.
(I had them write their procedure within their group)

Data:
Here I had them draw two boxes. They had to draw a before and after picture.

Conclusion: When we ______________ to ________________, _____________ happened. My hypothesis was (correct/incorrect).
"When we placed our seedling inside the box and left it outside, the plant grew toward the hole on the side of the box. My hypothesis was correct.
This is the form I generally like for their hypothesis to be in. It provides a summary, tells me their results, and goes back to their hypothesis.

We set our labs up on Thursday, and I put the boxes outside that afternoon. I retrieved them Friday morning and the kids did their conclusions Friday. I really should have left them out there for another day (moved what we did Wednesday in-between the two lab days) so the plants had more of a chance to grow. Oh well, lesson learned!

I will upload pictures of our plant labs, as well as the Law Theory cards soon. They're on my work computer and I completely forgot to bring them home!


Peace, love, and Science,
Ms. Kat