animal sort animals without backbones lesson 57. in our last lesson we learned which animals have...
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![Page 1: Animal Sort Animals Without Backbones Lesson 57. In our last lesson we learned which animals have backbones. We also learned ways to sort animals with](https://reader036.vdocuments.us/reader036/viewer/2022062322/5697bfe91a28abf838cb6cd1/html5/thumbnails/1.jpg)
Animal SortAnimals Without
BackbonesLesson 57
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In our last lesson we learned which animals have backbones. We also learned ways to sort animals with backbones. We learned we can
sort them into five groups: amphibians, reptiles, mammals,
birds and fish.
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Today we will learn about the many animals which do not have
backbones.
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There are more animals without backbones than with backbones.
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Some animals without backbones have shells or hard body coverings.
This helps them stay safe.
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Some animals without backbones have no shells. They have soft
bodies. These animals must use other ways to stay safe.
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Let’s make a list of animals without backbones who have
hard outer shells.
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Snails have no backbones and they carry a hard shell around on their back for protection. The shell
is the snail’s home.
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Snails move along on one wide, slimy foot. To hide from enemies the snail can pull its body into the
shell. Snail’s eat plants.
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Here is a video of a snail walking.
• https://www.youtube.com/watch?v=8crNeMGd_l4
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Spiders do not have
backbones but have a
hard covering on their body.
Spiders have 8 legs.
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Spiders make webs to catch their food. Spiders are meat eaters.
They eat insects.
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Here is a video of a spider spinning its web.
• https://www.youtube.com/watch?v=g5iN0ZaoW7M
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Lobsters do not have backbones but have hard shells. Lobsters are meat
eaters. They live in the ocean. Lobsters eat fish, crabs and clams.
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Here is a glimpse of a lobster underwater.
• https://www.youtube.com/watch?v=Lj0ecgBvSwo
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Let’s make a list of animals without backbones who have no
hard outer shells.
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Jellyfish do not have backbones and do not have a hard
outer shell to protect themselves. Instead
they can sting enemies with their
tentacles.
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Jellyfish eat fish and live in water. Here is a video of a jelly fish
swimming.
https://www.youtube.com/watch?v=GTXinF8ZVCo
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Centipedes do not have backbones but do have a hard outer shell. Centipedes have
around 30 legs.
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Centipedes are plant eaters and meat eaters. They eat insects and
spiders.
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Here is a video of a centipede eating a spider.
• https://www.youtube.com/watch?v=BMwHqNWFOZk
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Earthworms have no backbones and have no hard outer shells to
protect themselves. Earth worms also do not have legs.
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Earthworms eat plants and plant materials in the soil. Earthworms
help soil.
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This video shows how earthworms move.
• https://www.youtube.com/watch?v=_mba2COlUOg
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Today we learned about a few living things that do not have
backbones. Some of the living things have hard outer shells and
some do not.
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In our next lesson we will review what we have learned in Unit 5
Animals and Plants are Living Things.
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Keep observing the world around you!