🐞 Bugs – Insects and Arachnids

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🐞 Bugs – Insects and Arachnids

🌍 Where are bugs found?

• Bugs are everywhere—indoors and outdoors, all year round.

• They include insects (like ants, flies, bees) and arachnids (like spiders, ticks, scorpions).

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🐜 Insects

• Most common type of animal on Earth (10 quintillion alive at once!).

• Over 91,000 insect species known.

• Body has 3 parts: head, thorax, abdomen.

• Have 6 legs, antennae, hard outer skeleton (chitin), and many have wings.

• Have compound eyes (many lenses).

• Examples: butterflies, beetles, grasshoppers, ants, bees, termites.

• Social insects (ants, bees, termites):

  • Queen lays eggs.

  • Workers build nests and gather food.

  • Males mate then die soon after.

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🕷️ Arachnids (like spiders)

• Belong to a different group than insects.

• Over 100,000 arachnid species known.

• Body has 2 parts: cephalothorax + abdomen.

• Have 8 legs (not 6), simple eyes, no wings, no antennae.

• Spiders spin webs using spinnerets and use venom to paralyze prey.

• Ticks and mites are pests (bloodsuckers).

• Spiders are mostly harmless and helpful (eat insects).

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✅ Key Differences

Feature	Insects 🐜	Arachnids 🕷️
Body parts	3 (head, thorax, abdomen)	2 (cephalothorax, abdomen)
Legs	6	8
Antennae	Yes	No
Eyes	Compound eyes	Simple eyes
Wings	Some have wings	None
Examples	Ant, butterfly, fly	Spider, tick, scorpion

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🌟 Summary

• “Bugs” include both insects and arachnids.

• Insects: 3 body parts, 6 legs, many species, some live in colonies.

• Arachnids: 2 body parts, 8 legs, no wings or antennae, includes spiders, ticks, scorpions.

• Both can be pests, but many (like spiders and bees) are also helpful to the environment.

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QUIZ

1) Most bugs are part of which of the following families?

A: Arachnids

B: Pests

C: Arthropods

D: Insects

2) Spiders are part of which of the following families?

A: Arachnids

B: Pests

C: Arthropods

D: Insects

3) All the following are part of the arachnid family EXCEPT:

A: Scorpions

B: Mites

C: Grasshoppers

D: Ticks

4) Entomology is the study of which of the following?

A: Spiders

B: Insects

C: Trees

D: Body parts

5) All the following are body parts of insects EXCEPT:

A: Head

B: Thorax

C: Abdomen

D: Cephalothorax

6) If people owned bugs for pets, how many would each person have in their home?

A: 2,000

B: 91,000

C: 20,000

D: 1,000,000