Birds are flying vertebrates, though some species have adapted to living on the ground or on water.
There are two different types of animals: vertebrate and invertebrate. Vertebrate animals have a spinal column or backbone whereas invertebrate animals do NOT have one.
In this video you'll meet the main groups of vertebrate animals: mammals, birds, fish, reptiles and amphibians.
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Check out this interesting website with a lot of information about British history.
This is the website of a school in England. Check it out.
UNICELULLAR living things have only one cell. They sometimes form colonies. Unicellular living things feed, interact with the environment and reproduce.
MULTICELLULAR living things have many different cells. Examples: plants and animals.
Cells in multicellular living things are organized in levels. Cells > Tissues > Organs > Organ systems > Organisms.
Take a look at this interesting PowerPoint Presentation.
Bill Nye, a crazy teacher from the United States explains the difference between animal cells and plant cells. Watch the video and enjoy it!
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British Council - Elementary Podcasts