Monday, September 28, 2015

Social Studies Homework 29 due Oct. 5

Dear student,
We have studied and discussed about the Middle Ages. So we found that the Middle Ages were a dark age for Europe. There were constant invasions at the time and limited resources among other problems. For all this, the situation required Europeans to develop a new system for living. This system included all aspects of life, social, political, and economic. And we also learned it was called Feudalism. So far, we have learned about Political and Social Systems in the Middle Ages. We then need to find more about the Economic System.
Well, what is your job on this homework lesson? Check it out!
First, read about the economic system in at least five different sources. Outline information on separate sheets of paper.
Second, make sure you outline information from all given websites. For the outlines, use one sheet of paper per site. Example, one site = one outline. Another site = another outline. And then you go on.
Third, use information from the outlines to write three short paragraphs, a report to briefly explain how this economic system worked at the time.
Last, your name and date must be on the very top on the first page of your paper. On the last page, write the references (the sites that you visited and collected the information on your report). Hand in the outlines and the report for teacher’s check.

References:

Monday, September 21, 2015

Yogurt Making




Hundreds, even thousands, of fascinating organisms can be found in a single drop of pond water.


PARAMECIUM IMAGE



SCIENCE: PARAMECIUM


WHAT IS A PARAMECIUM?
A paramecium is a small (unicellular) living organism that can move, digest food, and reproduce. They belong to the kingdom of Protista, which is a group (family) of similar living micro-organisms.  Micro-organism means they are a very small living cell. You might be able to see one as a tiny moving speck if your eyesight is extremely good but for any detail at all you need a microscope to look at and study them.  They are about .02 inches long (.5mm). They are also famous for their predator-prey relationship with Didinium. Paramecium are known for their avoidance behavior. If an encounters a negative stimiulus, it is capable of rotating up to 360 degrees to find an escape route. Didinium are heterotrophic organisms. They only have one type of prey; the much larger cilate Paramecium. When a Didinium finds a Paramecium, it ejects poison darts (trichocysts) and attachment lines. The Didinium then proceeds to engulf its prey. Although Paramecium are larger than they are, Didinium are voracious eaters and will be ready to hunt for another meal after only a few hours.
WHAT DOES A PARAMECIUM LOOK LIKE?
The paramecium is an oval, slipper shaped micro-organism, rounded at the front/top and pointed at the back/bottom. The pellicle, a stiff but elastic membrane that gives the paramecium a definite shape but allows some small changes. Covering the pellicle are many tiny hairs, called cilia. On the side beginning near the front end and continuing half way down is the oral groove. The rear opening is called the anal pore. The contractile vacuole and the radiating canals are also found on the outside of a paramecium.  Inside the paramecium is cytoplasm, trichocysts, the gullet, food vacuoles, the macronucleus, and the micronucleus.  Study the drawing below.
http://101science.com/paramec.GIF
Pellicle - a membrane covering that protects the paramecium like skin
Cilia - hair like appendages that help the paramecium move food into the oral groove
Oral Groove - collects and directs food into the cell mouth
Cell Mouth - opening for food
Anal Pore - disposes of waste
Contractile Vacuole - contracts and forces extra water out of the cell
Radiating Canals - paths to the contractile vacuole
Cytoplasm - intercellular fluid needed to contain vital cell parts
Trichocyst - used for defense
Gullet - forms food vacuoles
Food Vacuole - storage pocket for food
Macronucleus - larger nucleus which performs normal cell functions
Micronucleus - smaller nucleus which is responsible for cell division.
Now look at the still microscope image below and see if you can pick out the various paramecium parts.

PARAMECIUM ON 101SCIENCE.COMImage courtesy: BioMEDIA ASSOCIATES
The paramecium, genus of protozoa of the phylum Ciliophora, is often called slipper animalcules because of their slipper-like shape. Paramecia are unicellular organisms usually less than 0.25 mm (0.01 in) in length and covered with minute hair-like projections called cilia. Cilia are used in locomotion and during feeding. When moving through the water, paramecia follow a spiral path while rotating on the long axis. When a paramecium encounters an obstacle, it exhibits the so-called avoidance reaction: It backs away at an angle and starts off in a new direction. Paramecia feed mostly on bacteria, which are driven into the gullet by the cilia. Two contractile vacuoles regulate osmotic pressure (see  Osmosis) and also serve as excretory structures. A paramecium has a large nucleus called a macronucleus, without which it cannot survive, and one or two small nuclei called micronuclei, without which it cannot reproduce sexually. Reproduction is usually asexual by transverse binary fission, occasionally sexual by conjugation, and rarely by endomixis, a process involving total nuclear reorganization of individual organisms.  Macronuclear DNA in Parameciumhas a very high gene density. The macronucleus can contain up to 800 copies of each gene. Paramecia abound in freshwater ponds throughout the world; one species lives in marine waters. They are easily cultivated in the laboratory by allowing vegetable matter to stand in water for a few days. The common species Paramecium caudatum is widely used in research.
HOW DOES A PARAMECIUM MOVE?
The paramecium swims by beating the cilia. The paramecium moves by spiraling through the water on an invisible axis. For the paramecium to move backward, the cilia simply beat forward on an angle.   If the paramecium runs into a solid object the cilia change direction and beat forward, causing the paramecium to go backward. The paramecium turns slightly and goes forward again. If it runs into the solid object again it will repeat this process until it can get past the object.
HOW DOES A PARAMECIUM EAT?
Paramecium feed on microorganisms like bacteria, algae, and yeasts. The paramecium uses its cilia to sweep the food along with some water into the cell mouth after it falls into the oral groove. The food goes through the cell mouth into the gullet. When there is enough food in it so that it has reached a certain size it breaks away and forms a food vacuole. The food vacuole travels through the cell, through the back end first. As it moves along enzymes from the cytoplasm enter the vacuole and digest it. The digested food then goes into the cytoplasm and the vacuole gets smaller and smaller. When the vacuole reaches the anal pore the remaining undigested waste is removed. Paramecium may eject trichocyts when they detect food, in order to better capture their prey. These trichocyts are filled with protiens. Trichocysts can also be used as a method of self-defense. Paramecium are heterotrophs. Their common form of prey is bacteria. A single organism has the ability to eat 5,000 bacteria a day. They are also known to feed on yeasts, algae, and small protozoa.Paramecium capture their prey through phagocytosis.
WHAT SENSES DO PARAMECIUM HAVE?
The paramecium can not see, taste, touch, or hear.  However, It evidently has some sense of  movement because it responds when it bumps into something.  It also can sense certain chemicals, as noted in: 
Chemosensory Signal Transduction in Paramecium
HOW DO PARAMECIUM REPRODUCE?
Paramecium are capable of both sexual and asexual reproduction. Asexual reproduction is the most common, and this is accomplished by the organism dividing transversely. The macronucleus elongates and splits. Under ideal conditions, Paramecium can reproduce asexually two or three times a day. Normally, Paramecium only reproduce sexually under stressful conditions. This occurs via gamete agglutination and fusion. Two Paramecium join together and their respective micronuclei undergo meiosis. Three of the resulting nuceli disintegrate, the fourth undergoes mitosis. Daughter nuclei fuse and the cells separate. The old macronucleus disintegrates and a new one is formed. This process is usually followed by asexual reproduction.
WHERE DO PARAMECIUM LIVE?
Paramecium live in aquatic environments, usually in stagnant, warm water. The species Paramecium bursaria forms symbiotic relationships with green algae. The algae live in its cytoplasm. Algal photosynthesis provides a food source for Paramecium. Some species form relationships with bacteria. For example, Paramecium caudatum hosts Holospora obtusa in its macronucleus. This bacteria is specific to the macronucleus of Paramecium caudatum; they cannot grow outside of this organism. This species acquires heat-shock resistance when infected with Holospora obtusa, which contributes to ciliary motion. Paramecium are also well known as prey for Didinium.
Paramecia play a role in the carbon cycle because the bacteria they eat are often found on decaying plants. Paramecium will eat the decaying plant matter in addition to the bacteria, further aiding decomposition.
Paramecia can be used as model organisms in research. Currently, they are being used a great deal in genetics research. For example, recent research involves inactivating Paramecium genes for studying functional analysis by homology-dependent gene silencing. They can also be used to study membrane excitability and the duplication of basal bodies.
CAN PARAMECIUM COMMUNICATE?
Read about this experimentation of the ability of a paramecium caudatum communicating through glass.  Daniel Fels documents the interactions among different populations of a single-celled ciliate,Paramecium caudatum, seperated by glass.  Because the glass barriers effectively prohibit the transfer of chemical signals, Fels infers that these simple organisms are using a form of weak electromagnetic radiation, so-called biophotons, to communicate.
Source:
http://101science.com/paramecium.htm




LA Homework 28 due Sept. 28


What is a tall tale?
Why is it called “Tall Tale”?
What main characteristics we may find in tall tales?
Find tall tales, read one you liked the most. Then copy it and bring it to class;
Share it with your classmates (retell the tall tale);
Mention the 5 basic elements of a story (we have learned in class);

Check some websites to help you find what you need:

Tuesday, September 15, 2015

Monday, September 14, 2015

LA Homework 27 due Sept 21.


Read “Charlie and the Chocolate Factory”; from chapter 19 to 23.


Outline the sequence of events in each chapter just the way we did in class (15 – 18).

Tuesday, September 8, 2015

MATH Homework 26 due Sept. 14


1-Talk to your parents about the size of your house. Make 2D drawings of some rooms. We did this activity at school (the soccer court);
2-Ask your parents for a measuring tape or a meter stick for you to measure some rooms of your house;
3-First, draw your bedroom, next can be the kitchen, and then the living room. Label the rooms and the measures;
4-Find the perimeter of each room. Last, calculate the area of these rooms;
5-Hand in your work for your teacher to check.

Friday, September 4, 2015

BACTERIA

Single Cell Organisms

Understanding Bacteria.

A)What are bacteria? 
B) In which environments do bacteria live?
C)What are the main ecological roles of bacteria?

Bacteria are Good and Bad

A) What are examples of human diseases caused by bacteria?
B) What are some industrial processes that use bacteria?

C) How do bacteria reproduce?

Wednesday, September 2, 2015

People of the Middle Ages

A king (or lord) ruled large areas of land. To protect his land from invasion, the king gave parts of it to local lords, who were called vassals. In return, his vassals promised to fight to defend the king's land.
Vassals ruled lands granted to them by their king. Those lands were called fiefs. Within a fiefs, a vassal acted as a local lord and could give portions of it to vassals of his own. Someone might be the vassal of one person, but the lord of another.
Knights were warriors who fought on horseback. In return for land, they pledged themselves as vassals to the king. Only the sons of lords could become knights. Candidates for knighthood began training as pages at the age of 7, learning social graces and skills such as fencing and hunting. At 13 or 14 they became squires and began to practice fighting on horseback. Squires served as assistants to knights both in the castle and on the battlefield. At 21 a squire could become a knight himself, kneeling before the lord of the manor to be "dubbed" on the shoulder with a sword. Kings, local lords, and knights were all part-of a ruling class that called itself noblemen.
Noblewomen were the wives and daughters of noblemen. They were in charge of the household servants and supervised the upbringing of children. They also helped take care of the sick and the poor. In certain cases, noblewomen themselves could own land. They could inherit it from their parents or from their husbands. When a nobleman was away, his wife ruled the manor. This meant that the noblewoman, if called upon by her lord, could send knights into battle, just as a man would.
Bishops were the leaders of the church, serving under the pope, the bishop of Rome. Most bishops were noblemen. Bishops supervised the church's priests, monks and nuns and administered its business. In many parts of Europe the church owned vast areas of land and commanded a large number of knights. In the early Middle Ages, it was not unusual for a bishop to lead his own knights into battle.
Priests provided spiritual instruction and conducted religious ceremonies in local, or parish, churches.
Monks and nuns were men and women who gave up their possessions and left ordinary life to live in monasteries and convents. They lived very simply, could not marry and devoted themselves to prayer, study, and helping the poor. They also served as doctors.
Frairs were traveling preachers who lived by begging and spread the teachings of St. Francis of Assisi (see Medieval Voices on p. 34).
Serfs lived in small communities called manors that were ruled by a local lord or vassal. Most peasants were serfs. They were bound to the manor and could not leave it or marry without the manor lord's permission. Serfs did all the work on the manor farm: they worked the fields, cared for the livestock, built and maintained the buildings, made the clothing, and cut firewood. Men, women, and children worked side by side. Serfs had small plots of land they could work for themselves; sometimes a serf saved enough money to buy his freedom and became a freeman.
Servants were peasants who worked in the lord's manor house, doing the cooking, cleaning, laundering, and other household chores.
Merchants set up businesses in the towns that began to grow in the later Middle Ages. The most commonly traded items were salt, iron, and textiles. There were also rarer items, such as silk and spices, that came from the trade with China and the Middle East. As trade grew, a new class of highly skilled crafts- people developed. These artisans produced cloth, shoes, beer, glass and other goods that required more expertise than was available on many manor farms. Other artisans cut and shaped the stones for the
. Women plied several of these crafts, and in some, like weaving and brewing, they played the leading role. Traveling merchants brought much-desired items to small towns and villages far from the major trade routes.
Minstrels were entertainers who traveled from town to town, often in groups. Most minstrels were singers or musicians, but some had other skills as well. They juggled, did acrobatics, or danced. Minstrels were known by different names in different parts of Europe. In Germany minstrels were called minnesingers, in France jongleurs, in Ireland bards. The most famous minstrels were those of southern France. They were called troubadours, from the Latin word that means "to compose." Many of the love poems they composed in the local language, Provencal, are still read and admired today. The troubadours were so famous that we know 500 of them by name.

Source: http://www.themiddleages.net/people_middle_ages.html