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Online Quiz (Worksheet A B C D)

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Upper Elementary Science - I
2.12 Grouping of Animals

Vertebrates and Invertebrates

The living things in the world are divided into two big groups: plants and animals. Animals are classified into two smaller groups by examining their skeletons. Reach your hand behind you and run your fingers up and down the center of your back. That long, bumpy ridge you feel is the backbone, which is also called the spine. It is made of a stack of small bones, each one called a vertebra. Animals with backbone are called vertebrates. A horse, a dog, a cat, a fish, a bird, a frog etc are examples of vertebrates.

Many animals have backbones but many do not. An animal that does not have a backbone is called an invertebrate, a word that means no backbone. Earthworms, a moth, an oyster, a spider etc all are invertebrates.

The vertebrates are further classified into five smaller groups, fish, amphibians, reptiles, birds and mammals.

Cold-blooded and Warm-blooded

Some animals get the warmth they need from the air or water around them. When its hot outside their body temperature rises. When its cold, their body temperature drops. These animals are called cold-blooded animals. It doesn’t mean that blood is always cold. It means their body temperatures go up or down depending on the temperatures around them. Fish, amphibians, and reptiles are cold- blooded.

Other animals stay nearly the same temperature no matter whether the air around them is hot or cold. These animals are called warm-blooded animals. Mammals and birds are warm-blooded.


Directions: Answer the following questions.
Q 1: All living things are classified into plants and ______.
trains
animals
robots
cars

Q 2: Frogs, toads, and salamanders are examples of _____.
reptiles
amphibians
mammals
fish

Q 3: Warm blooded animals are classified into two groups: birds and _____.
fish
reptiles
amphibians
mammals

Q 4: Goldfish, trouts and sharks are examples of ____
fish
amphibians
mammals
reptiles

Q 5: Earthworm, moth, oyster, spider are examples of _____.
plants
minerals
invertebrates
vertebrates

Q 6: Snakes, lizards, and turtles are examples of ______.
mammals
fish
amphibians
reptiles

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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