1) Why do scientists classify animals? a) organize information b) to show relationships c) to learn more about animals d) all of the above 2) Which is not a way scientists classify animals into groups? a) by how much they weigh b) by their body covering c) by whether they are cold-blooded or warm-blooded d) by whether they are vertebrates or invertebrates 3) How do some warm-blooded animals keep their body temperatures constant when their surroundings are cold? a) basking on a rock b) going into the shade c) burrowing in the mud d) migrating 4) Which animal is not cold-blooded? a) a fish b) a mammal c) a reptile d) an amphibian 5) How are animals that have backbones classified? a) as vertebrates b) as invertebrates c) as insects d) as jellyfish

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