March 07 2013 Teaching Students With Hands On Technology: Multiliteracies. Elect P. Anna Paddon MLA Cowichan May 14 2013. School Education Improvements & Reform.

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MLA Cowichan May 14
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2. Meet the
Arthropods
Insects,
Spiders, and
Their
Relatives

3. What’s an arthropod?
An arthropod is an animal that:
 Isan invertebrate (has no backbone
or spinal chord)
 Has jointed limbs
 Has a segmented body
 Has an external skeleton
(exoskeleton) made of a substance
called “chitin”

4. Arthropods Are Everywhere
You can find arthropods everywhere: in a
yard, on a street, in a pond, in the sea.
So what are they?
This creature is an ant, which
is an insect. Insects are a kind
of arthropod that have three body divisions
(head, thorax, and abdomen) and six legs.
The feelers on its head don’t count as legs.

5. This beetle has a segmented body, an
exoskeleton, and six jointed legs.
Is it an insect?
Yes
No

6. Where are the beetle’s legs?
Circle them.

7. Most insects are larvae
before they become full
grown.
Larvae include the grubs and caterpillars
that you may have seen in a garden. Later
they mature into adult insects.

8. Butterflies and moths
are insects.
They have six legs.
When butterflies and moths first hatch from
their eggs, they are caterpillars. But they are
still insects.

9. When the hornworm moth is a larva, it
looks like the picture below.
Is it still an insect?
Yes
No

10. Arachnids are another kind
of Arthropod.
This creature is Spiders are arachnids.
a raft spider. arachnids are a kind of
arthropod that have two
body sections
(cephalothorax and
abdomen) and eight legs.

11. Scorpions are also
a kind of arachnid.
Besides their legs, arachnids also have
other appendages, which do different
things, depending on the kind of arachnid.
The scorpion is an
arachnid that has eight legs.
It also has a pair of claws.

12. How many legs does a spider have?
6
8
 12

13. Circle the spider.

14. Another common class of
arthropods are
Crustaceans have several body segments that
crustaceans.
are grouped into a head, a thorax, and an
abdomen.
The head and thorax may be fused into
one piece, and the whole body may be
covered by a carapace. Crustaceans
have at least 10 legs.
The crab on this slide is a crustacean.

15. You may have eaten
a crustacean.
Most crustaceans live in water. Lobsters,
crabs, shrimp, crayfish, and barnacles are
crustaceans. A few live on land, like
woodlice.

16. Which animal is a crustacean?
 Scorpion
 Moth
 Shrimp

17. There are other kinds
of arthropods.
For example, there are the myriapods, which
include centipedes. Centipedes have a pair
of legs for every segment of their bodies.

18. Circle the insects.

19. How many legs does
a crustacean have?
6
 At least 10
8

20. Draw a circle around the arthropod that
is not an insect, an arachnid, or a
crustacean.