ELEMENTS AND ATOMS

1. Element: a substance that can´t be broken down any further into anything simpler.

2. Atom: the smallest particle of an element that has the same chemical properties as the element.

3. Nucleus: an atom´s dense center, where most of its mass is.

4. Electron: a negatively charged particle that moves around an atom´s nucleus.

5. Proton: a positively charged particle inside an atom´s nucleus.

6. Neutron: a particle with no charge inside an atom´s nucleus

7. Atomic Number: the number of protons in an atom.

8. Metal: any of the group of elements that conduct heat and electricity, is shiny and bendable.

PHYSICAL PROPERTIES

1. Matter: any solid, liquid, or gas.

2. Mass: the amount of matter in an object.

3. Volume: the amount of space an object takes up.

4. Density: the amount of mass in a certain volume of material.

5. Physical Property: a property that can be observed without changing the identity of a substance.





6. Physical Change: a change in size, shape, or state without forming a new substance.

7. Solution: a mixture of one substance dissolved in another so that the properties are the same throughout.

8. Chemical Change: A change in matter that produces a new substances with different properties from the original.

NEW YEAR 2011

A NEW YEAR FOR BLOGGER AND NEW OPPORTUNITIES OF LEARN SCIENCE. I HOPE THIS YEAR MY BLOG WOULD BE BETTER THAN LAST YEAR.

Summary #8 "Blood System" in other words the "Circulatory System"

The function of the circulatory system is to transport nutrients and oxygen to all the humans´ body. The blood have three types of cells and its function :

• Red Blood Cells: transport nutrients and oxygen.



•  White Blood Cells: Fight diseases( infections )

• Platelets:  Stop bleeding and cover injuries from bleed.
  
  

The most important organ on the Circulatory System  is the heart; is the only organ that pumps blood to all our body. There are three types of blood vessels in our body here is with each function are:

1. Arteries: Carry blood from the heart to the body.
2. Capillaries: Connect veins and arteries.
3. Veins: Bring the blood back to the heart.

The circulatory system isn´t only the heart and the three blood vessels; it is the lungs, the small intestine and the kidneys.

Summary #7 "How Ecosystems Change"

What happens when people abandon a city? Natures takes over; one example is the cities and the temples of Angkor in Camboidia (they were built between 820 and about 1150. Lest me explain you; the gradual replacement of one monnunityby another is called Ecological Succesion. The ecological succesion takes places in five steps:

1. Abandoned Farm---First Year: A comunity of crabgrass, insects, and mice invades the fields where corn or another crop once grew.
2. Second and Third Years: Tall weeds, such as asters, ragweed, and goldenrod, and tall grasses grow among the crabgrass. The crabgrass can´t easily survive in the shade cast by the taller weeds. It begins to die out. Rabbits and seed-eating birds move in.
3. Four to six Years: The comunity is growing it have stunks, birds and others mammals like the mouse.
4. Twenty five years later: Pines agrew up there are much kinds of mammals like the fox, racoons,birds etc.
5. One hundred years later: know the forest is an decidious forest with deers,more trees etc.

Summary #6 "Places to Live Around the World"

    One of Earth´s large ecosystem, with its climate, soil, plant and animals is called biome. Each person live in 1 biome it could be : 

 1. Taiga: A cool, forest biome of conifers in the upper Northern Hemisphere.

 

 2. Tundra: a cold, forest biome of the farnorth, marked by spongy topsoil.

3. Desert: A sandy or rocky biome, with a little precipitation and a little plant life.

4. Deciduous Forest: a forest biome with many kinds of trees that lose their leaves each Autumn.

5. Tropical Rain Forest: a hot, humid biome near the equator, with much rainfall and a wide variety of life.

Each biome have characteristics:

• Location
• Climate( how much rains in that biome?)
• Soil
• Plants
• Animals

But do you know about a Water Biome? There are two types of  Water Biome:                                 

• Fresh Water:

1. Plankton: Biotic factors that floats in the water.
2. Neckton: Biotics factors that swim throught water.
3. Bethos: Bottom-dweling organism.

• Salt Water:

1. Upper Region: 100-200meters deapht
2. Lower Region: 200-1000meters deapht

Summary #5 "Surviving in Ecosystems"

In this topic you will learn about how organisms can help or hinder the survival of other organisms. Certain factors control the growth and survival of living things. Anything that controls the growth or survival of a population is called a limiting factor. Some limiting factors are nonliving. Sunlight, wind, water, and temperature are examples of nonliving limiting factors. Living organisms can also be limiting factors. For example, the number of prey in an ecosystem can determine the number of predators the ecosystem can support. Plants live almost everywhere on Earth. Plants can survive because they have developed special characteristics. Characteristics that help an organism survive in its environment are called adaptations. One of the harshest areas for plant growth is a desert. The barrel cactus is adapted to the conditions of the desert. The plant's roots are very shallow and grow only about 3 inches into the dry soil. When rain falls, the roots catch the rain and soak it up very quickly. The stem of the cactus also helps it survive. It stores water. Different kinds of organisms interact with each other in a number of different ways. There are relationships between different kinds of organisms. In nature a relationship between two kinds of organisms is called symbiosis. There are different kinds of symbiosis. Sometimes both organisms benefit from the relationship. Sometimes one organism benefits while harming the other. Sometimes only one benefits. When a relationship between two organisms benefits both of them it is called mutualism. Yucca trees and yucca moths cannot survive without each other. Each helps the other reproduce. A relationship in which one kind of organism lives on or in another organism and may harm that organism is called parasitism. The organisms that live on or in other organisms are called parasites. Fleas are parasites of dogs and cats. The fleas live off the blood of these animals and give nothing back but itching and irritation. When one organism benefits from another without harming or helping it is called commensalism. Many animals have this kind of relationship. There are certain tropical fish that live unharmed among the poisonous tentacles of sea anemones. The anemones provide safety for the fish. Yet the fish neither harm nor help the anemones.

1. Adaptation: Characteristics that help an organism to  in an environment.

2. Simbiosis: In nature a relationship between two kinds of organisms.

3. Mutualism: When a relationship between two organisms benefits both of them.

Yucca tree

4. Parasitism: A relationship in which one kind of organism lives on or in another organism and may harm that organism.

5. Commensalism: When one organism benefits from another without harming or helping.