Recent Changes

Friday, November 12

  1. page Revolution versus Rotation edited Revolution and Rotation ... What's the difference? The difference?The Earth rotates ... Wh…

    Revolution and Rotation
    ...
    What's the difference? Thedifference?The Earth rotates
    ...
    What's the difference? Rotationdifference?Rotation is when
    ...
    and 'view' buttons. Revolutionbuttons.Revolution is when
    ...
    'view' buttons.
    Revolution or rotation? Read about revolution and rotation. Read carefully and ask yourself, what is the difference?
    Watch this video about revolution and rotation.
    (view changes)
    12:42 pm
  2. page Revolution versus Rotation edited ... and Rotation {earth_revolution.gif} {earth_revolution.gif} Revolution or ... the di…

    ...
    and Rotation
    {earth_revolution.gif}

    {earth_revolution.gif}
    Revolution or
    ...
    the difference?
    The
    The Earth rotates
    ...
    the difference?
    Rotation
    Rotation is when
    ...
    'view' buttons.
    Revolution
    Revolution is when
    ...
    'view' buttons.
    Revolution or rotation? Read about revolution and rotation. Read carefully and ask yourself, what is the difference?
    Watch this video about revolution and rotation.
    (view changes)
    12:41 pm
  3. page Newton's Third Law edited Newton's Third Law {law3.gif} Law Law #3-For every ... opposite reaction. In In the …

    Newton's Third Law
    {law3.gif}
    Law
    Law #3-For every
    ...
    opposite reaction.
    In
    In the picture
    ...
    going down).
    {rocket.jpg}
    Another

    {rocket.jpg} Another
    example of
    ...
    expelled downwards).
    Objects
    Objects can also
    {newton's_cradle.jpg}
    Experiment with Newton's Cradle. Be sure to scroll down and play with the interactive Newton's cradle.
    ...
    rocket balloon video.
    Watch
    video.Watch these short
    ...
    energy. Bowling balls Skateboards
    ballsSkateboards
    (view changes)
    12:40 pm
  4. page Newton's Second Law edited ... In the pictures above, people are trying to move vehicles. Both the blue car and the brown van…
    ...
    In the pictures above, people are trying to move vehicles. Both the blue car and the brown van are moving at the same speed, .05 m/s/s. However, the blue car weighs 1,000 kg, while the brown van weighs 2,000 kg. Since the brown van is twice as heavy as the blue car, it will take twice as much force, or energy, to move it the same speed.
    Learn more about Newton's Second Law of Motion.Watch this video about Mass and Acceleration.

    (view changes)
    12:40 pm
  5. page Earth's Seasons edited Earth's Seasons {Earthseasons.gif} = {Earthseasons.gif} =  Why does the Earth ha…

    Earth's Seasons
    {Earthseasons.gif}
    =
    {Earthseasons.gif}
    =
    
    Why does the Earth have seasons? Believe it or not, the seasons are not due to the Earth's orbit around the sun, but the tilt of the Earth's axis. The axis is an imaginary line running through the center of the Earth. This axis, however, is not straight, it is tilted 23.5 degrees. Look in the top right corner of the picture above to see the tilt of the axis.
    Because of the axis' tilt, different hemispheres (or halves) of the Earth tilt towards or away from the sun during the different times of the year.
    Winter-The northern hemisphere, where we live, is tilted away from the sun. Because of this tilt, we get less sunlight and it is colder.
    Spring-Neither hemisphere is tilted towards or away from the sun. The weather is not too hot or too cold.
    Summer-The northern hemisphere is tilted towards the sun. Because of this tilt, we get more sunlight and it is hotter.
    Autumn/Fall-Neither hemisphere is tilted towards or away from the sun. The weather is not too hot or too cold.
    Places near the equator (the imaginary line running around the center of the Earth) do not tilt as much towards or away from the sun, so their seasons are less intense. The further away from equator a place is, the more pronounced seasons it will have.
    Read more about the Earth's Seasons.
    Play a Season Game.
    Learn more at Observing the Earth-Seasons.
    Watch this video about seasons.

    (view changes)
    11:47 am
  6. page Earth's Seasons edited Earth's Seasons = {Earthseasons.gif} = 

    Earth's Seasons
    =
    {Earthseasons.gif}
    =
    

    (view changes)
    11:26 am
  7. file Earthseasons.gif uploaded
    11:25 am
  8. page Endangered Species edited ... We are studying endangered species. Compare and contrast the external features and behaviors …
    ...
    We are studying endangered species.
    Compare and contrast the external features and behaviors that enable different animals and plants (including those that are extinct) to get food, water, and sunlight; find mates; and be protected in specific land and water habitats.
    Species can become endangered for many reasons. Some of these reasons include overhunting/poaching, loss of habitat, pollution and introduction of new species to their environment.
    Overhunting/poaching is when an animal is hunted and killed for specific body parts. An example of this is an elephant. The tusks of elephants are considered to be very valuable. Many poachers illegally hunt and kill elephants, then remove their tusks and sell them.
    Loss of habitat is when an animal's home is taken over by something else. This is almost always due to human interference. The rainforest is the home to the largest diversity of plant and animal species in the world. Many rainforests are being cut down and the trees are being used for lumber. Forests are also being cleared to make room to graze cattle. When a forest is cut down, all of the animals that lived there are now homeless. They cannot get food or find shelter and many die.
    Pollution of the land and water causes many animals to become endangered. A large variety of animals live in the ocean. When an oil tanker spills, the oil covers the water and affects all of the animals. Many animals are coated in the oil and die. Those who survive have difficulty finding food because their food source died.
    Introduction of new species can also cause endangerment. Many birds used to live in the forests in the country of Guam. The brown tree snake came to Guam in ships carrying cargo. The brown tree snake is carnivorous and eats birds. Because of this introduction of a new species, 10 out of 11 types of native birds in Guam have disappeared.
    Read more about why animals become endangered in this ThinkQuest.
    See a list of endangered species by state.
    Learn more about individual species that are endangered. Endangered Species Profiles
    Play this Endangered Species Matching Game

    (view changes)
    10:21 am

Thursday, November 11

  1. page space.menu edited [[include component="pageList" homeAtTop="true" hideInternal="true"…
    [[include component="pageList" homeAtTop="true" hideInternal="true" limit="100"]]homeAtTop="on" limit="100" ]]
    (view changes)
    5:40 pm
  2. page space.menu edited [[include component="pageList" homeAtTop="true" hideInternal="true" …
    [[include component="pageList" homeAtTop="true" hideInternal="true" limit="100"]]
    (view changes)
    5:39 pm

More