INSECTS

PRE READING TASKS

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Beetle, butterflies and moths, fly, ant, bee, wasp, grasshopper, dragonfly

Ex.1 Answer to the questions?

1. What kind of insects do you know?

2. What insects can you meet in the area that you live?

3. How many legs do insects have?

4. What group of insects do you know?

5. Has insects useful side?

WHILE READING TASKS

Ex. 2 Find out from the text. Are these sentences true are false?

1. Mammals are the largest group of animals on earth.

2. New species of insects are continually being found

3. Insects have nine legs; and most have wings.

4. Some people call all insects "bugs", this is correct.

5. Different kinds of insects can be divided into groups called components

Ex.3 Complete the sentences with the words in the box

flies, beetles,  butterflies and moths, grasshoppers, true bugs, ants, bees, and wasps

1. _____ (order Coleoptera) have the front pair of wings changed into a hard shell to protect the back wings.

2.  ______ (order Lepidoptera) have large, often colourful wings.

3.  ______ (order Diptera) have only two wings.

4.  ______ (order Hymenoptera) sometimes have stingers and sometimes live in large colonies (like ant hills).

5.  ______ (order Hemiptera) have a mouth that is long and narrow, like a drinking straw. This kind of mouth is called a beak.

6.  ______ (order Orthoptera) can usually jump with their legs. Eat grass and grain plants.

ALL ABOUT INSECTS

Insects are the largest group of animals on earth by far: about 926,400 different species have been described. They are more than half of all known living species. They may be over 90% of animal species on Earth.

New species of insects are continually being found. Estimates of the total number of species range from 2 million to 30 million.

Insects have six legs; and most have wings. Insects were the first animals capable of flight. As they develop from eggs, insects undergo metamorphosis. Insects live all over the planet: almost all are terrestrial (live on land). Few insects live in the oceans or in very cold places, such as Antarctica. The most species live in tropical areas.

Some people call all insects "bugs", but this is not correct. Only some insects are true bugs, which is a particular order of insects. People who study insects are called entomologists.

Different kinds of insects can be divided into groups called orders. There are many insect orders. The biggest insect orders are listed below:

• Beetles (order Coleoptera) have the front pair of wings changed into a hard shell to protect the back wings.

• Butterflies and moths (order Lepidoptera) have large, often colourful wings.

• Flies (order Diptera) have only two wings.

• Ants, bees, and wasps (order Hymenoptera) sometimes have stingers and sometimes live in large colonies (like ant hills).

• True bugs (order Hemiptera) have a mouth that is long and narrow, like a drinking straw. This kind of mouth is called a beak.

• Grasshoppers (order Orthoptera) can usually jump with their legs. Eat grass and grain plants.

• Odonata, dragonflies and damselflies are top predators of other insects. Both aquatic nymphs and flying adults are carnivorous.

• Phasmatodea, the stick and leaf insects, is an order which is entirely based on camouflage. It includes the world's longest insect, Chan's megastick.

Spiders, scorpions, and similar animals are not insects; they are arachnids. Arachnids are arthropods that have four pairs of legs. Centipedesare also arthropods, but not insects: they are in a subphylum called the Myriapoda.

POST – READING TASKS

Ex.4 Hunt for the words shown on the list below, then circle them as you find them.

E x.5 Solve “Insect Crossword”

E x 6 Circle the correct word