An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs.

Arthropoda means “jointed feet”. There are more than 1 million kinds of arthropods on Earth.

An exoskeleton is a hard, outer covering.

Molting is to leave an exoskeleton and grow a new one.

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1. Segementation – specialized function 2. Well defined head with appendages –sensory or adapted for food 3. Exoskeleton - protection 4. Have Social Behaviors 5. Increased brain size and complexity and parallel increase in sensory abilities 6. Internal Fertilization and Separate Sexes

1. Variations in structure

2. Variations in lifecycle (no competition between adult and pupa)

3. Variations in BEHAVIOR like: High rate of reproduction and short life span Small size – more niches available small animals Number, size and shape of appendages Eat so many different types of food Complex sense organs (complex interactions) Communication Camouflage, warning coloration and mimicry Live in societies and show division of labor Ability to fly Coevolution with plants (plant specific)

A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding.

Crustaceans can ________ certain parts of their body. A ___________ can re-grow its claws. Most crustaceans live in ______ and get oxygen from the water through _________. Gills are

* Centipedes and millipedes are arthropods that have many legs. * Have _______ pair of legs in each segment. * Are carnivores and eat _________. * To capture its prey, a centipede puts _______ into the prey’s body with its _______. * Centipedes are found in ___________ like under rocks and in the soil.

* Centipedes and millipedes are arthropods that have many legs. * Have ___ pairs of legs on each segment. * Eat _________ and are shy animals. * When scared, it _________________ to protect itself. * Are found in __________like under rocks and in the soil. * Do not have ________.

* All have __________ legs. * Have a body divided into two parts: ______________________________ ______________________________ __

* Spiders usually eat __________, but some spiders eat small _______________ like hummingbirds. * Many spiders make webs out of _________. * Silk is _________________________________.

* Spiders catch their prey in many different ways. * Some spiders catch their prey in ____. * Some spiders ________ from their prey and then ________________________. * When spiders catch their prey, it _______ it and _________ it. * Spiders breathe oxygen with __________.

m/watch?v=iVqkJdb9J J0 Spiders Hunting in Packs

* Scorpions usually live in __________ areas. * Most scorpions are __________________. ** Nocturnal means ____________________ * During the day, scorpions hide __________ ______________________________. * When scorpions capture prey, they _______ ___________________________________.

* Ticks and mites live on _______________. * Some ticks and mites suck juices from ____________________. * Other ticks and mites are very tiny and live on __________.

* Many ticks suck the blood from _________. * Ticks can give animals a ____________.

*There are more kinds of insects than there are all other animal species all together. * There could be _______________ times as many insects as humans on Earth. * Insects have a body that is divided into ____ parts. * An insect’s body is divided into a ________, a _____________, and a ___________ area.

* Insects have _____ legs connected to the chest part. * Some insects’ legs are all the same size. Some insects have one pair of legs larger than the other two pairs. * A grasshopper has one pair of legs larger than the other two pairs. These larger legs are used for ____________. Longer back legs

* Insects eat a lot, so they grow very fast. As they grow, insects may molt and grow new ___________, or they may change completely. * A huge change in appearance is called ________. * There are two kinds of metamorphosis: ______________ and ______________.

* In complete metamorphosis, insects like butterflies and moths have _______ stages of development. * The first stage makes an ________. * During the second stage, the egg hatches and a _________ comes out. * A caterpillar is the larva of an insect that will become a butterfly or a moth.

* During the third stage, a ___________ is made. * A pupa is sometimes wrapped in a _____________ or in a _______________. * A cocoon is the pupa of a _____________. A cocoon is made of ________. * A chrysalis is the pupa of a ___________. * In the last stage, the insect is finally an adult.

* Incomplete metamorphosis happens in grasshoppers, termites, and dragonflies. * In incomplete metamorphosis, young animals that look like the ___________ hatch from eggs. * As the young animals grow, they keep _________, shedding their exoskeletons, and getting larger.

* Most insects live alone. But, some insects are ___________ and cannot survive alone. * These insects live in ______________ or hives. * A colony is _____________________________ _______________________________________

* An amazing example of a colony is a __________. * A beehive is ___________________________.

* All insects must protect themselves. * Bees and wasps have _______________ to protect themselves. * Many other insects use ______________. * Camouflage allows an insect to hide by ___ _______________________________.