CH4 Animal groups

The following five groups of animals have backbones. What are their characteristics?

Groups:

(a) Mammals

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(b) Birds

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(c) Fish

• have a beak(喙 )

• breathe through gills(鰓)

• Have hair on their bodies

• Swim with fins (鰭)

• have feathers（羽毛） on their bodies

• Nurse their young with milk

• Have a pair of wings (翅膀)

• Have hard scales(鱗片)

Organize these options into the right categories

Groups:

(a) Amphibians (兩棲類)

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(b) Reptiles (爬行類)

• Have wet skin and no scales (鱗片)

• They breathe through gills when they are young. They breathe with lungs when they become adults.

• dry skin and hard scales (鱗片)

• breathe with lungs

Organize these options into the right categories.

Groups:

(a) Animals with backbones（有脊椎）

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(b) Animals without backbones（無脊椎）

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Organize these options into the right categories

Groups:

(a) Mammals (哺乳類)

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(b) Birds

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(c) Fish

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Organize these options into the right categories

Groups:

(a) Amphibians (兩棲類)

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(b) Reptiles (爬行類)

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Insects' bodies are divided into ... parts

• two

• three

• four

Insects have ... pairs of legs

• three

• four

• five

• six

What is A?

• thorax

• head

• antennae

• abdomen

What is B?

• thorax

• head

• antennae

• abdomen

What is C?

• thorax

• head

• antennae

• abdomen