Multi-Cellular Spectabuliciousness

 

Paramecium...single cell
Hydra ...two layers of cells (tissues)
Planaria...three layers
Daphnia...organs
Structure, behavior, feeding, reproduction, and ecology
They do it all. 

Next Monday we will continue our study.

Homework for Friday: Read chapter 1, Section 3: The Organization of Living Things, plus answer questions in section review (page 23) and chapter review (pages 26-27)   50 pts. for complete answers.

Also, in preparation for next week's quiz, here is the quizlet: http://quizlet.com/19171567/7th-grade-cells-multicellular-organisms-holt-flash-cards/

Don't Be Cell-fish ...

Fish Cells, colorized

Read Textbook Chapter  1, section 2.  Use that information to fill out the worksheet handed out in class.  50 points for a job carefully done.


 
Some videos:
Inner Life of the Cell: What we watched in class, now watch to see what structures you can recognize, and what you think is happening.  Bear in mind the white rolling cell is a white blood cell, whose job is to find and destroy the germ-invaders.

Review of class/ Cell Structures
http://www.youtube.com/watch?v=2s87SyRh3t0&list=PLF34A8BA3412E7D64  5 pts.

BrainPOP  login: pcshome  ilearnathome
http://www.brainpop.com/science/cellularlifeandgenetics/cellstructures/
movie, quiz, activity page (5 pts. each page) and FYI - 20 points for all

Cell-ery

Remember the Cell Theory:
Cells are t-- b---- u---- o- l---.
All l------ t----- a-- m--- o- c----.
All cells c--- f--- p--e-------- c----.

Remember the parts of the prokariotic cell (bacteria):
cell w---, cell m-------, c--------, D--, r-------, f---------, p---, p------.


Today in class:
What kind of cells did we look at under the microscope?

1. bacteria (yogurt)

4. protist (single-celled animal)

human cheek cell

2. anacharis (little plant leaf)

yeast cells dividing

3. onion skin

In these photos, can you find:
-cell wall or membrane
-nucleus
-cytoplasm
-any organelles

On Monday we will look at these again, but not under microscopes.  btw, good job *focusing* in class. ;)  -pun intended.



HOMEWORK:

1. plant cell coloring page 15 pts.
2. Review reading: chapter 1, section 1. pages 2-11  just reading if you have already done the study guide questions, if not, do so now.  10 pts.
3. Observing the shrimpies: If they still live, describe.  If not, hypothesize why they may have died. Be sure to describe the environmental conditions: water-is it clear or cloudy? How warm is the water? and anything else that you think might be important.  Write in your science journal.  10 pts.

Optional Video:
Brainpop.com http://www.brainpop.com/science/cellularlifeandgenetics/cells/  password: pcshome   username: ilearnathome  --movie, quiz, FYI, activities (first worksheet only) 15 pts.
http://www.brainpop.com/science/cellularlifeandgenetics/cellspecialization/  --movie, quiz, FYI, activity (one page-vocabulary) 15 pts.

Micrographia

When Robert Hooke wrote Micrographia back in 1665, it was an incredible work of art as well as an enlightening book of science. Today that tradition of combining art and science continues through some amazing photography.  Below is a collection of cells arranged into a Christmas collage; the organelles are stained various colors.  These are some of the many types of cells found in a mammal's body, magnified between 200-2000x. Each of these cells has a specific function; some might be blood cells or muscle cells or skin cells or ...the list goes on....

Your assignment is to produce a mini-book showcasing the various specialized cells, which could include bacterial cells, archaea cells, single-celled animals, and the various types of cells found in plants or animals.  You choose.  Draw accurately and label what type of cell it is and where it would be found.  Cover + six cells = 35 pts.   How to find images: When you use Google image search it it ABSOLUTELY ESSENTIAL to make sure the safe search is ON. Look in the upper right corner. Please get your mom to start you off. I suggest you search for "cells photography microscopic." Not all the pictures will be what you are looking for.

Next, the two coloring pages given in class: I suggest using colored pencils or fine point markers.  You are asked to read the back page until you come to an instruction to color.  First you color the "item" and then you use the same color to write over the word label at the top of the page. Then color the sentences on the written side which are the description with that same color. 15 pts.

If you have extra time and wish to have less homework on Friday, you may read Chapter 1, section 2 and answer the study guide questions.

If your swimmies are still alive, great job!  Can you please bring them to class on Thursday so we can view them under a microscope?

Thanks for class today, and for the "lively" [*pun*] debate. As George Washington once said, "The mind of a jr. higher is a scary place to be."

He didn't really say that.

liverwort (20X)

Prokaryote Pizza

Now it is time to get acquainted with our textbooks, which I passed out on the last day of class before vacation.  Hope you still can find them! Chapter One, section one - Cells: The Basic Units of Life.  Read pages 2-11; In your science log, write down the vocabulary words and their definitions. Write down the three parts of the "cell theory." Answer the questions in the study guide on page 11. (Younger students may do this aloud to a sibling or mom.) Review the diagram of the bacteria, and be able to draw & label  it from memory. 50 pts. for all.
The Big Idea- All organisms are composed of one or more cells.  So in answer to our question, What are the characteristics of life? we can say, living things are always made of cells.

Bacteria have 3 basic shapes: can you figure out what they are?  draw the 3 shapes in your science journal, and give them names.

Taking Care of the Shrimpies-  So now that we know it's an animal, we have to feed it something.  But what??? lots of choices.
Feeding:The  shrimpies are not hard to feed. They accept most foods that they can filter out of the water as long as it’s not too big and doesn’t dissolve in water. Examples of this are yeast, wheat flour, soybean powder, egg yolk. It’s hard to know how much to feed them, but don't overdo--they are small!
Oxygen & Water Quality: Feeding means pooping too, so you'll want to change the water now and then.  Here's how:  Aquarium maintenance: Brine shrimp are usually kept in small tanks which means that water quality may deteriorate quickly. This means that water changes are of utmost importance. I recommend changing at least 20% two times a week. This is to prevent low oxygen levels which will be a result of poor water quality. It’s also important to clean the bottom of the tank since brine shrimp moult very often during their way to adult hood which leaves a lot of remains on the bottom of the tank which may deteriorate the water quality. This should be done by night using a flashlight to draw the brine shrimp to the surface. Brine shrimp are drawn to light and the light from the flashlight will attract the brine shrimp to the light source keeping them safe while you are cleaning the bottom of the tank. {So I think that means using your mom's turkey baster to pull the junk out of the jar bottom; get your mom to show you how to do this. Replace 20% of the salt  water with new salt water--use one tablespoon rock salt or sea salt to one quart water.}


Could some of you who have lids bring in your shrimpies on Monday to look at under the microscope?  Thank you.
And keep making observations and recording in your science log!

What Is the Meaning of Life?

Are Flames Alive? video question

Here is a link to the worksheet I handed out in class: The Martian and the Car,
in case you misplaced it.  Feel free to get ideas from brothers, sisters and even parents, if you wish.  25 pts.

A short video: Introduction to the characteristics of Life
Reading: (3 pages) What is Life?  10 pts.

Hopefully you brought your jars of salty water + "whatever" home.  Just to remind you of the assignment, here goes:

1. Put your jar in a safe, not-too-hot spot, where it will not be thrown away or forgotten.  Tell your family about it so they will not dispose of it either.  Maybe give it a name. (Peanut is taken, but Peanuts could work.)
2. Set aside two or more pages in your science log for making observations, drawing illustrations, and asking questions.
3. Make your first day's observations.
-Write a description
-Draw what you saw under the microscope
-Make a hypothesis about what it might be, or what category: plant, animal, fungi, protist, bacteria?
-Is it alive?  what makes you think so?
-What might it need in the coming days?

Goal is to keep these kritters alive and observe them for at least three weeks, and grow them as large as possible, and to use our most careful descriptive writing skills possible.  OBSERVE, OBSERVE, OBSERVE!
15 pts.