陽光分級(jí)閱讀初三上About Snails課件

1、About SnailsText by Chris BroughIllustrations by Astrid Matijasevic陽光英語 初三上 13Warm-up(the picture of snail)(the picture of spiral shell)(the picture of slug) What is this? What do we call it in Chinese? What does it mean when we say “蝸?！保?What does it mean when we say “snail”? Can you distinguish be

2、tween snails and slugs?BrainstormList out what will cover in an explanatory text that introduces animals.Mind mapsnailsphysical characteristicslife cyclehuman relevanceMind mapForm a group of 4. Finish the reading task and make a mind map in groups.Role sheetGroup presentationShare your groups mind

3、map in class. Other groups comment on the mind map and give suggestions.Physical characteristicsSize varies. In general, not big. Can be as small as a pinhead or as big as a football.A soft body, with eyes, tentacles, and a mouth.A special tongue covered with sharp teeth.No inner skeleton.A hard she

4、ll. Most spiral in a clockwise direction (right-handed shells). Can grow with the snail.Relatively strong for their size.Hermaphrodites.Mind mapMind mapLife cycleEggs:Those of a garden snail are round and white and about the size of a peppercorn.Those of some freshwater snails are jelly-like.Both ma

5、le and female snails can lay eggs.Those of the land snails are generally laid in the ground.Those of the sea snails are laid on water under a bubble float, or are attached to rocks or shells.Those of the freshwater snails are laid in strings near freshwater.Some snails dont lay eggs.Are laid at nigh

6、t or early morning.Are laid in three or four batches.Amount varies.Mind mapBaby snails:Most take three to four weeks to hatch.Its shell is very soft and has two whorls.Food: its own shell, soil, and then plants.Deep sleep:Aestivate in hot days.Hibernate in cold days.Mating:Two snails meet and mate.

7、They touch tentacles, rub mouths and make lots of slime.Mind mapHuman relevanceRegarded as pests: snails feed on plants.Regarded as food: periwinkles are eaten in many African and Asian countries. The meat is high in protein and low in fat.Regarded as pets: people buy freshwater snails to breed at h

8、ome. Say “Stop the bus!” when you hear the wrong information, and correct it.Stop the busThe snail belongs to a group of animals called molluscs, most of which have a hard shell on the outside. Snails are all small and weak, and usually live in dark and damp places. So you can find them everywhere b

9、ut the dry desert. According to where they live, there are three types of snails: land snails, freshwater snails, and sea snails. A snail begins life as an egg, but the parent keeps the eggs in its body and young snails are born alive. Baby snails would eat their eggshells and soil to get calcium. T

10、hey like fresh and juicy leaves, fruits and flowers very much, but hate rotting plants. Snails hibernate in summer and aestivate in winter. When spring comes, snails wake and start to look for food. Then two snails may meet and mate, laying 20- 40, or more eggs. Snails can live for only several months. What a short life! Stop the busExplanatory methodComparison and contrast: “They can be as small as a pinhead or as big as a football.” (P2) Group discussionWriting exerciseWrite about frogs. Search for relevant information to understand their li