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Bigger Food Chains

Here's another food chain, with a few more animals. It starts with acorns, which are eaten by mice. The mice are eaten by snakes, and then finally the snakes are eaten by hawks. At each link in the chain, energy is being transferred from one animal to another.

There can be even more links to any food chain. Here another animal is added. It goes

Grass to grasshopper to mouse to snake to hawk.

There is actually even more to this chain. After a hawk dies, fungi (like mushrooms) and other decomposers break down the dead hawk, and turn the remains of the hawk into nutrients, which are released into the soil. The nutrients (plus sun and water) then cause the grass to grow.
It's a full circle of life and energy!!

So food chains make a full circle, and energy is passed from plant to animal to animal to decomposer and back to plant! There can be many links in food chains but not TOO many. If there are too many links, then the animal at the end would not get enough energy.

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Bigger Food Chains Here's another food chain, with a few more animals. It starts with acorns, which are eaten by mice. The mice are eaten by snakes, and then finally the snakes are eaten by hawks. At each link in the chain, energy is being transferred from one animal to another.

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http://www.sheppardsoftware.com/content/animals/kidscorner/foodchain/foodchain2.htm

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Copyright © 2018 Discovery Education. All rights reserved. Discovery Education is a subsidiary of Discovery Communications, LLC.

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https://assignments.discoveryeducation.com/?cdPasscode=T1F6E-40D7

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energy; energy quest; the energy story; energy primer; what is energy; electricity; static electricity; resistance; electrical circuits; stored energy; batteries generators; turbines; power plants; electricity transmission system; fossil fuels; coal; oil; natural gas; natural gas distribution system; biomass; geothermal; hydro; hydroelectric; nuclear energy; fission; fusion; ocean energy; solar energy; photovoltaics; wind energy; renewable; nonrenewable; environment; air quality; transportation energy; saving energy; energy efficiency; conservation; hydrogen; energy in the future

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The Energy Story - Chapter 1: Energy - What Is It?

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The Energy Story is a general introduction to energy. Chapters explore renewable energy, fossil fuels, electricity, circuits and many other things.

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Patterns

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Seeing Stars

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Here Comes the Sun
http://www.kidsastronomy.com/our_sun.htm

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Copyright © 2018 Discovery Education. All rights reserved. Discovery Education is a subsidiary of Discovery Communications, LLC.

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http://kidshealth.org/en/kids/digestive-system.html

http://www.ngkids.co.uk/science-and-nature/digestive-system

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http://kidshealth.org/en/kids/rsmovie.html

http://discoverykids.com/articles/your-respiratory-system/

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http://kidshealth.org/en/kids/msmovie.htm

http://kidshealth.org/en/kids/muscles.html

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http://kidshealth.org/en/kids/brain.html

http://www.ducksters.com/science/nervous_system.php

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http://kidshealth.org/en/kids/heart.html

http://discoverykids.com/articles/your-cardiovascular-system/

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http://tdflashzone.net23.net/index.php?p=2_11

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Science >> Chemistry for Kids

The Periodic Table is a way of listing theelements. Elements are listed in the table by the structure of their atoms. This includes how many protons they have as well as how many electrons they have in their outer shell. From left to right and top to bottom, the elements are listed in the order of their atomic number, which is the number of protons in each atom.

Periodic Table of Elements
Click for larger view

Why is it called the Periodic Table?

It is called "periodic" because elements are lined up in cycles or periods. From left to right elements are lined up in rows based on their atomic number (the number of protons in their nucleus). Some columns are skipped in order for elements with the same number of valence electrons to line up on the same columns. When they are lined up this way, elements in the columns have similar properties.

Each horizontal row in the table is a period. There are seven (or eight) total periods. The first one is short and only has two elements, hydrogen and helium. The sixth period has 32 elements. In each period the left most element has 1 electron in its outer shell and the right most element has a full shell.

Groups

Groups are the columns of the periodic table. There are 18 columns or groups and different groups have different properties.

One example of a group is the noble or inert gases. These elements all line up in the eighteenth or last column of the periodic table. They all have a full outer shell of electrons, making them very stable (they tend not to react with other elements). Another example is the alkali metals which all align on the left-most column. They are all very similar in that they have only 1 electron in their outer shell and are very reactive. You can see all the groups in the table below.

This lining-up and grouping of similar elements helps chemists when working with elements. They can understand and predict how an element might react or behave in a certain situation.

Element Abbreviations

Each element has its own name and abbreviation in the periodic table. Some of the abbreviations are easy to remember, like H for hydrogen. Some are a bit harder like Fe for iron or Au for gold. For gold the "Au" comes from the Latin word for gold "aurum".

Who invented it?

The periodic table was proposed by Russian chemist Dmitri Mendeleev in 1869. Using the table, Mendeleev was able to accurately predict the properties of many elements before they were actually discovered.

Fun facts about the Periodic Table

Carbon is unique in that it is known to form up to 10 million different compounds. Carbon is important to the existence of life.

Francium is the rarest element on earth. There are probably no more than a few ounces of it on earth at any given time.

The only letter not in the periodic table is the letter J.

The country Argentina is named after the element silver (symbol Ag) which is argentum in Latin.

Although there is helium on Earth, it was first discovered by observing the sun.

Activities

Take a ten question quiz on this page.

Listen to a reading of this page:

Your browser does not support the audio element.

Full Periodic Table

Periodic Table with detailed information
(click for larger view)

More on the elements and the Periodic Table

Elements

More Chemistry Subjects

Science >> Chemistry for Kids

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Science >> Chemistry for Kids The Periodic Table is a way of listing theelements. Elements are listed in the table by the structure of their atoms. This includes how many protons they have as well as how many electrons they have in their outer shell.

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http://www.chem4kids.com/files/elem_intro.html

http://www.ducksters.com/science/periodic_table.php

https://safeshare.tv/x/ss58460079db8dc

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https://assignments.discoveryeducation.com/?cdPasscode=T1F6E-40D7

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http://tinyurl.com/37vlkd