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4/21 & 4/22 - 7 th Grade Agenda Collect HW: Reading & Notetaking 195 – 196 Cnidarians & Worms Classwork: Making Scientific Names Passback HW Video: Life.

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Presentation on theme: "4/21 & 4/22 - 7 th Grade Agenda Collect HW: Reading & Notetaking 195 – 196 Cnidarians & Worms Classwork: Making Scientific Names Passback HW Video: Life."— Presentation transcript:

1 4/21 & 4/ th Grade Agenda Collect HW: Reading & Notetaking 195 – 196 Cnidarians & Worms Classwork: Making Scientific Names Passback HW Video: Life (Deep Ocean) Textbook Reading 415 – 421 HW: Reading & Notetaking 197 – 200

2 Reflection Prompt: Write 3 facts that you know about Jelly Fish and Coral Reef.

3 Sea anemone and many circular animals exhibit R______ S_______ adial ymmetry What are some characteristics of Radial Symmetry Animals? Do not have distinct front or back ends Lives in the ocean Senses their environment in all directions

4 The balanced arrangement of a butterfly’s body is called B_______ S________ ymmetry ilateral What are some characteristics of Bilateral Symmetry Animals? Larger & More complex than radial symmetry animals Moves more quickly Sense organ in the front

5 Is a Sponge an animal or a plant? Sponge is an animal Although it cannot move around from place to place sponge take food into their bodies

6 What do sponges eat? Tiny organisms such as bacteria and protists Sponge gets its oxygen from water Network of spikes support the sponge

7 Sponge Larva Sponge reproduce asexually and sexually Sponges do not have separate sexes At any one time of the year, some sponges are producing eggs and others are producing sperms

8 What are Cnidarians?

9 Jellyfish Facts They are not used to make Jelly 98% Water No Heart or Blood Most don’t have a brain (except Box Jellyfish) Most only detect light. Some have 24 eyes (Box Jellyfish) When stung, Vinegar (not urine) is the best treatment Irukandji Jellyfish (size of fingernail) can kill you with a single sting.

10 More on Cnidarians Unlike sponges, cnidarians have specialized tissues Muscle like tissues for swimming Anemones stretch out

11 How does cnidarians obtain and digest food? Cnidarians captures its prey by using its stinging cells to inject venom Then the cnidarian’s tentacles pull the prey animal to its mouth From there the food passes into a body cavity where it is digested.

12 How are coral reefs made? Built by cnidarians 1.Free swimming coral larva attaches to a solid surface ( broken shell, sunken ship) 2.The coral polyp produces a hard, stony skeleton around its soft polyp body 3.Over thousands of years, as live corals add their skeletons, the reef grows

13 What are the major type of worms Flatworms Roundworms Segmented Worms

14 Lifecycle of a tapeworm

15 An organism that lives inside or on another organism and takes its food from that organism is a P_______ arasite

16 Do worms have brains? Yes They also have a heart, digestive tract and reproductive organs

17 Is an earthworm helpful? Yes. Earthworm dropping make the soil fertile. Earthworm tunnels loosen the soil and allow air, water, and plant roots through it

18 How do Earthworms Mate? Earthworms are hermaphroditic meaning each worm has organs of both sexes. One worm has to find another worm in order to mate


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