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    Unit 4: Amazing Animals

Focusing on Word Forms and Suffixes: Look carefully at the word families in the table below and learn to spell the parts of speech.

Click the sound icon and listen to the sentences. Write the missing words to complete each sentence.

1. of the number of plant and animal species living on earth have increased dramatically in recent years.

2. There are three categories of species, or species that face possible .

3. The Mexican long-tongued bat is classified as a species because its numbers are declining.

4. The eastern indigo snake and the red kangaroo are examples of species because their natural habitats are being depleted.

5. Plants and animals that face an immediate danger of becoming completely are classified as endangered species.

6. There are many factors that cause to animals. of aquatic and habitats is a major cause. Soil, air, and water as well as deforestation can all a plant or animal's natural habitat.

7. Animals are often by hunters who want to show their prowess by killing large species. They often display the animal's heads with its large horns or make rugs from their hides.

8. A native species is one that grows or lives naturally in a particular area. When a foreign or species gets introduced into that environment, it may the existence of the native species within its own habitat or even cause the of the natural habitat.

9. Government agencies and nonprofit organizations are working to decrease the numbers of or endangered species. Because so many species are necessary for ecological balance and for human health, it is important to increase human of the need to plant and animal species and save them from .   

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