Page 27 - Science Course 2 (Book 1)

Mo1-L3b: What are the Groups of Chordates?

Key Concept SUMMARY
What are the Groups of Chordates? What are the Groups of Chordates?

How do the groups of vertebrate chordates differ? Vertebrate chordates have a backbone and
include fish, amphibians, reptiles, birds, and
mammals.

Mo1-L3: Vocabulary Review

Directions: Complete the crossword puzzle with the correct terms from the word bank.

amnion ectotherm endotherm
gill mammary gland notochord

Across
3. a protective membrane that surrounds the
embryo.
5. an organ that exchanges carbon dioxide for
oxygen in the water.
6. a flexible rod-shaped structure that supports the
body of a developing chordate.

Down
1. a special tissue that produces milk for young
mammals
2. an animal that generates its body heat from the
inside
4. an animal that heats its body from heat in its
environment
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