1 00:00:00,300 --> 00:00:08,460 Hello boys and girls, how are you today? Welcome to a new Natural Science Unit, Unit number 4, Plants. 2 00:00:08,859 --> 00:00:14,519 In this unit we are going to learn about different things related to plants. 3 00:00:14,980 --> 00:00:20,899 Are plants born? Do plants grow, reproduce and die? 4 00:00:21,719 --> 00:00:26,800 Do plants eat food? Can plants move around? 5 00:00:26,800 --> 00:00:33,159 Do plants breathe? 6 00:00:33,159 --> 00:00:40,079 We are starting with Unit 4, Lesson 1, Classification of plants. 7 00:00:40,079 --> 00:00:43,100 First of all, what are plants? 8 00:00:43,100 --> 00:00:44,700 Plants are living things. 9 00:00:44,700 --> 00:00:49,439 The plant life cycle includes the following stages. 10 00:00:49,439 --> 00:00:54,399 Plants are born, grow, reproduce and die. 11 00:00:54,399 --> 00:01:09,689 born, grow, reproduce and die. Plants, as all living things, perform three vital 12 00:01:09,689 --> 00:01:23,079 functions. Nutrition, reproduction and interaction. Do you remember the parts of 13 00:01:23,079 --> 00:01:33,060 a plant? We learned this last year in second grade. Roots, stem, leaf and flower. 14 00:01:33,060 --> 00:01:46,019 Remember roots, stem, leaves and flower. Plants have roots, stem, leaves and flower. 15 00:01:46,019 --> 00:02:06,230 The roots absorb water and minerals from the ground. The stem transports this 16 00:02:06,230 --> 00:02:24,939 water and minerals throughout the plant. The leaves make the food. They use water, 17 00:02:24,939 --> 00:02:44,080 minerals, air and sunlight. The flower makes the seeds for plant reproduction. 18 00:02:44,080 --> 00:02:52,539 Remember this only happens in flowering plants. Non-flowering plants do not 19 00:02:52,539 --> 00:03:02,629 produce the seeds in the flower. Classification of plants. There are many 20 00:03:02,629 --> 00:03:12,370 types of plants number one according to their stem plants with different stem 21 00:03:12,370 --> 00:03:33,469 grasses bushes and trees remember grasses bushes and trees grasses have a 22 00:03:33,469 --> 00:03:49,840 flexible green stem and they are short. Bushes have a thick stem but it's not a 23 00:03:49,840 --> 00:04:09,050 trunk. They are shorter than trees. Trees have a thick stem called trunk and they 24 00:04:09,050 --> 00:04:23,980 are taller than bushes and grasses. Number two, classification of plants, loose 25 00:04:23,980 --> 00:04:37,819 or keep their leaves. Plants can be deciduous or evergreen. Remember evergreen 26 00:04:37,819 --> 00:04:47,329 deciduous. As we can see here they are different depending on the season. 27 00:04:47,329 --> 00:05:04,459 Evergreen, they are very similar all the year. Evergreen plants always have leaves 28 00:05:04,459 --> 00:05:15,040 in spring, summer, autumn and winter. On the other hand, deciduous plants lose 29 00:05:15,040 --> 00:05:23,459 their leaves in autumn. As we can see here, in spring new leaves start to grow 30 00:05:23,459 --> 00:05:33,600 in summer the tree has plenty of leaves in autumn the leaves start to change 31 00:05:33,600 --> 00:05:42,740 color and fall to the ground and in winter deciduous trees have no leaves 32 00:05:42,740 --> 00:05:55,639 classification of plants three with seeds and without seeds seed plants seed 33 00:05:55,639 --> 00:06:02,399 plants produce seeds. All the plants that you can see here in this PowerPoint 34 00:06:02,399 --> 00:06:11,199 slide produce seeds. As you can see from the seed it starts to grow a new plant. 35 00:06:11,199 --> 00:06:28,680 There are different types of seeds. Seed plants use seeds to reproduce. Seed 36 00:06:28,680 --> 00:06:38,259 plants. There are two different types of seed plants. Gymnosperms, like an ice 37 00:06:38,259 --> 00:06:53,639 cream cone. Angiosperm, flower. Gymnosperm, without flower they have cones. For 38 00:06:53,639 --> 00:07:06,569 example pine trees produce seeds inside a cone. Angel sperms with flowers they 39 00:07:06,569 --> 00:07:20,600 have fruits. For example, almond trees produce fruit with seeds inside. On the 40 00:07:20,600 --> 00:07:32,120 other hand we have non-seed plants. Non-seed plants produce spores. Non-seed 41 00:07:32,120 --> 00:07:52,279 plants use spores to reproduce. Non-seed plants. Ferns and Moses. Ferns have roots, 42 00:07:52,279 --> 00:08:09,449 stems and leaves. Fern spores are on the underside of the leaf. Mosses have stems 43 00:08:09,449 --> 00:08:25,120 and leaves but not true roots. Moss spores are inside capsules. Remember we 44 00:08:25,120 --> 00:08:28,319 need plants and plants need us.