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Thursday, May 5, 2011

Quick Google Questions that Review the First 1/2 of 8th Grade

If you google these questions quickly it covers 8th Grade and it will trigger other ideas.

1)    Tell me the primary reason for the formation of the Grand Canyon.
2)   What is soil made of?
3)   Tell me what erosion is.
4)   Tell me what weathering is.
5)   Tell me what deposition is.
6)   What can fossils tell you about a given area?
7)   What layer of the Earth is responsible for Earthquakes?
8)   What’s a convection current?
9)   What is seafloor spreading?
10)                Draw a diagram of the 4 Layer of the Earth.
11)                What creates the Earth’s magnetic field?
12)                What is displacement?
13)                How do you calculate the volume of a box?
14)                Give me two examples of characteristic properties of a substance.
15)                Why do some object float in liquid?
16)                What is the density formula?

A little More Chemistry :-)

A chemical element is a single element (He, N, O, etc.)

1)    A chemical compound is two or more elements together (NaCl)

2)    Small particle that makes up most types of matter on earth? ATOMS

3)    Do compounds have the same chemical properties as the elements that compose them?

No, their physical and chemical properties can be different from the constituent elements.

Example :
Sodium is a silvery, soft, light metal that combusts if it becomes wet.
Chlorine is a greenish-yellow gas that is lethal when inhaled.
The compound they form is sodium chloride, or table salt, which is stable and non-toxic.
4)    Elements in the same group, UP and Down on the periodic table will have similar properties

5)    Na + Cl à NaCl    (Na + Cl) = Reactants         (NaCl)= Product

6)    The products are usually completely different that the reactants.  For Example, Hydrogen is explosive and Oxygen is flammable, but together they put out fires.

7)    The law of conservation of mass dictates the quantity of each element does not change in a chemical reaction. Thus, each side of the chemical equation must represent the same quantity of any particular element.  CH4 + 2 O2 CO2 + 2 H2O

8)    Metals are shiny, can be bent and conduct electricity

9)    In a chemical change, the substances are altered chemically and display different physical and chemical properties after the change. When a chemical change occurs new substance(s) are formed through a reorganization of the atoms. A chemical change is irreversible.

10) In a chemical reaction, the substances you begin with are called reactantsA compound present at the beginning of a chemical reaction.. The new substances that are formed are called products A compound that is formed as a result of a chemical reaction..

11)   A base is Bitter to taste but a acid is sour

Chemistry Review

8th grade Study Guide

Solvents dissolve other substances
A solute is the substance that is dissolved by the solvent
A solution a homogeneous mixture of two or more substances
Sugar and NaCl(salt) are both soluble in water
IRON, GOLD, Hydrogen are all pure substances
Water is a natural solvent
Metals are conductors
If you shake a solution and have a solid left at the bottom the solid is considered to be insoluble
Metals attract to magnets
Filters are used for thick materials that are insoluble
Evaporation is used to evaporate a liquid and separate out another material that will be left behind.  If you evaporate sugared water, the water evaporates and you are left with the sugar

Saturday, November 20, 2010

Bahloo, Moon Man

    • Bahloo, the Moon, was lonely high up in the empty sky, so he decided to visit Earth. When the campfires were burning and the girls were dancing, Bahloo came down close to Earth and lowered his shining face to speak to the girls. They were frightened by this bright round white thing and ran away.
    • The next night he returned to find two other girls sitting on the riverbank. “How beautiful the moonlight is,” sighed one of the girls. This was encouraging to Bahloo, and he decided to come closer to the girls. He broke into a run, puffing and blowing, his big bell shaking. The girls were surprised by Bahloo, and they didn’t know whether to laugh or shout for help. They ran away to a safe distance and stood there staring back at the Moon.
Myth Cont.

    • Bahloo’s feelings were hurt, and he sat down by the riverbank and cried. The girls felt sorry for Bahloo and returned. They invited him to ride in their canoe to the other side of the river. But Bahloo was so big that, when he stepped into the canoe, it rocked and tipped, and then turned over, dumping Bahloo into the water. The round shining Moon sank down, down into the water and his light became dimmer and dimmer. The girls laughed and ran home.
    • Bahloo was very embarrassed. He climbed into the sky without anybody noticing and remained hidden for several days. Gradually, he regained his courage and grew round and bright for all to see. But when he remembered the girls and how they laughed at him, he began to get smaller and soon went out of sight. Every month, Bahloo grows round and bright and full of courage, and every month he remembers his fall into the river and shrinks away to hide.

Tale of the rabbit

    • There had been four Suns in previous ages, and all had ended in catastrophic destruction. The gods came together to create a new and final Sun. To create the Sun, one of the gods would have to jump into the fire, the hearth of the gods. The gods gathered at the hearth at midnight to determine which god would make the sacrifice and become the Sun.
    • Two gods volunteered. One of them was wealthy and strong, the arrogant Tacciztecatl, and the other was poor, sick, and frail, the god Nanahuatzin. Both agreed to die in order to raise the new Sun.
Myth Cont.

    • But when the strong god approached the fire, the flames flared high, and frightened, he fell back from the edge. His fellow gods shouted encouragements to him to take the leap but he could not.
    • Humble Nanahuatzin approached the fire, and without hesitating, he leaped into the flames. His body sizzled, cracked, and burned. This gave Tacciztecatl the courage to jump, and he did. The other gods waited in the darkness for signs of the dawn and Nanahuatzin’s transformation into the fifth Sun.
Myth Cont.

    • The gods kept arguing among themselves as to where the Sun would first appear. Each one took up a position looking in a different direction so they would be sure to see the Sun as it first came up. And finally the Sun appeared brilliant and red in the east, the direction of creation and new life. Following the Sun, Nanahuatzin, was a second very bright ball, Tacciztecatl, reincarnated as the Moon. Both balls remained still, and in order to get them to move across the sky, the rest of the gods had to sacrifice themselves in the fire.
Myth Cont.

But before they died, one of the gods did something to the Moon. He grabbed a rabbit and hurled it into the Moon’s bright face, darkening tremendously.

Moon and His Sister

  • The Moon was a good-spirited and friendly Indian whose facce was even brighter than that of the Sun. Moon had one sister, a small star who was often seen beside him, and he had many other star friends.
Myth Cont.

    • One day Moon gathered all of his friends together for a great potlatch. His house was very small, and soon the guests had taken up all the space.
    • As soon as Moon’s sister arrived, Moon asked her to fetch water for him in several buckets. This was not an easy task, as it was winter. She had to struggle with the cold, howling wind as she walked to get the water. The water was frozen by the river, and she had to chip through the ice in order to fill the buckets.
Myth Cont.

    • She walked back to the house with her heavy burden, only to find that there was no room inside for her. She called to her brother, “Where can I sit?”
    • Moon was in a very good mood and he just grinned at his sister. “There isn’t enough space for even a mouse in here. I guess you will have to sit on my shoulder,” he laughed.
    • Moon’s little sister was not in the mood for his good humor. She took him at his word and jumped onto his shoulder. There she sits even today holder on to her water buckets. Moon is not as bright as he once was as the shadow from her bucks dims his face.

Rona in the Moon

Rona

Rona was the daughter of the sea god Tangaroa. She was the Tide Controller. One night she was carrying a bucket with stream water back home to her children, when the path became dark. The Moon slipped behind the clouds making it impossible to see anything. As Rona was walking, she hit her foot against a root that was sticking out of the ground. She was so upset that she couldn't see the root, she made some unkind remarks about the Moon. The Moon heard her remarks and put a curse on the Maori people. The Moon grabbed Rona and her water bucket. Many people today see a woman with a bucket in the Moon. It is said that when Rona upsets her bucket, it rains. This Maori story symbolizes the influence of the Moon on the rain and on the waters of the Earth, and especially on the tides.
In a separate Maori myth, a man named Rona went to the Moon to find his wife. To this day, the two take turns eating each other.