1. The Four Seasons

2. SpringSummer Autunm Winter There are four seasons: 3. Many people think that the seasons are due to the distance of the Earth from the Sun.But consider the following facts: The Earths orbit around the Sun is nearly a perfect circle. The Earth is slightly closer to the Sun in January and farther away from the Sun in July. Read the text below 4. While it is winter in the Northern hemisphere it is summer in the Southern hemisphere. If the seasons were due to our distance from the Sun both hemispheres would have the same seasons at the same time. In fact, the seasons are due to the tilt of the Earths axis. In summer the sunlight strikes the ground more vertically than in winter and heats the ground better. The sun is above the horizon for a longer period of time 5. 6. Listen and fill in the gaps 7. 8. Thes__shines more and thed___begin to get warmer. S____gis a time whenp____sand __ eeswake up after a longw____nap. You can see manyflower bl_____sand lots ofi______s visiting them to collectn____rand__llen .There is a relationshipbe_____enplants and insects called mutualism:p______sget pollinated and insects get theirf____ .Some plants are pollinated by birds,m________alsor by thew_____. Spring 9. 10. Summer Theof pollinated flowers becomes a fruit.Inside the fruit are theEach one comes from an eggcalled. When fruits are completelythey open and spread the seeds.Fill in the gaps with proper words from the list: ripenedovaryseedsovule 11. 12. Fill in the gaps with proper words from the list: rootembryominutegerminateleavesconditionsphotosynthesiswet Fall After some rains the ground becomesandseedsInside the seed there is anthat is, aplant waiting for favourable environmentalThe new plant produces aand aand thebegin to make 13. 14. When theturns cold plants. Thedoesnt flow through the. are protected from freezingin special buds. This is the time tothe fruit trees. Choose one wordfrom the list to fill in each gap: Sap Stems Hibernate Prune Leaves Weather Winter 15. Reproductionofplantsandanimals 16. Listen 17. Complete using words from the list:fspermatozoazygoteovummaleemale 18. 19. Complete using words from the list:sepalspollen grainsstigmafilamentovulespistilstyleantherovarystamen. 20. _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ Write 4 sentences describing thenumberedprocesses 21. Say the names of this part of the flower 1 2 5 3 22. Label the pictures 23. Label the part indicated by the arrow 24. Label the parts indicated by the arrows 25. 26. What do you think this bee is doing? Resting Waiting for a mate Taking nectar Taking pollen Nothing Pollination 27. Describe what you see 28. Look carefully atthe next picture and try to discover what is happening 29. 30. Hints: 1. The bee is not looking for food 2. It is not taking a rest either 3. The bee is confused 4. The bee is inlovewith theflower. 5. It is a male bee 6. He thinks the flower is ashe-bee 31. 32. The bee iscopulatingwith the flower. The bee is performing apseudocopulation 33. Look carefully at the next picture and try to discover what is happening 34. 35. Hints: 1. The bee is not looking for food 2. Itis not taking a rest either 3. The bee has been deceived bythe flower 4. The bee isdrunk 5. The bee is an alcoholic 36. This flower attracts insects offering a strong substance that intoxicates them. The bee is very fond of this strong smell because... 37. The bee gathers this smell and uses it to attract females . The bee is getting dressed up. It is a male. Its very vain 38. Birds and bats can also pollinate flowers 39. Even you can do it by yourself... 40. And the wind... 41. Look carefully at the next picture and try to discover what these pointy balls are 42. 43. A microscopic view of some pollen grains. The picture was made with a scanning electronic microscope. 44. More pollen grains Pollinic tube 45. Fruits and seeds 46. 47. Name these fruits 48. 49. The End 50. Describe what you see in the next picture 51.