Fill in each blank with the correct word from the lesson.

1. Among animals, vertebrates have backbones and are divided into five groups: fish, amphibians, reptiles, birds, and _______.
2. Scientists have identified more than eight million species of _______ things on Earth.
3. Plants make their own food through _______ — they're producers.
4. To study them without going mad, they sort them into groups _______d on shared features — this is called classification.
5. They can't move from place to place and they have stiff _______ walls.

Choose the best option for each question.

1. What is the main difference between plants and animals?
   a) Plants move, animals don'tb) Animals make food, plants don'tc) Plants make food, animals eat othersd) Animals have cell walls, plants don't
2. Which vertebrate group includes animals that feed their young on milk?
   a) Reptilesb) Birdsc) Amphibiansd) Mammals
3. A frog lives both on land and in water. Which group is it?
   a) Reptileb) Fishc) Mammald) Amphibian

Write T for True or F for False in the brackets.

1. Plants make food, animals eat others is one of the key concepts in the lesson on Classifying Living Things.
2. Plants move, animals don't is the main topic of this lesson.
3. Among animals, vertebrates have backbones and are divided into five groups: fish, amphibians, reptiles, birds, and mammals.
4. Among animals, vertebrates have backbones and are divided into five groups: fish, amphibians, reptiles, birds, and Reptiles.

1. In your own words, explain what Classifying Living Things means.
2. List two things you learned from this lesson on Classifying Living Things.