Elementary Science Program www.espsciencetime.org www espsciencetime or Fountas & Pinnell DRA M 28 1/10 Copyright 2010 by the Board of Cooperative Educational Services for the Second Supervisory District of Monroe and Orleans Counties, Elementary Science Program. All rights reserved. This publication may only be reproduced for one-time classroom use. No part of this publication may be stored in a retrieval system, or transmitted or reproduced, in any form by any means, electronic, mechanical photocopying, recording, or otherwise, without the prior written permission of Monroe 2–Orleans BOCES, Elementary Science Program. Correlation Written under funding from Monroe 2–Orleans BOCES by: Antonietta Quinn, Resource Teacher Ashlee Bryant, Reading Specialist Kristen Giuliano, Reading Specialist Paulette Reddick, Reading Specialist Designed and Printed by the BOCES 2 Printing and Graphics Services. Plant and Animal Life Cycles Seed Dispersal
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ElementaryScience Program
www.espsciencetime.orgwww espsciencetime or
Fountas & Pinnell
DRA
M
28
1/10Copyright 2010 by the Board of Cooperative Educational Services for theSecond Supervisory District of Monroe and Orleans Counties, Elementary Science Program. All rights reserved. This publication may only be reproducedfor one-time classroom use. No part of this publication may be stored in aretrieval system, or transmitted or reproduced, in any form by any means, electronic, mechanical photocopying, recording, or otherwise, without the prior written permission of Monroe 2–Orleans BOCES, Elementary Science Program.
Correlation
Written under funding from Monroe 2–Orleans BOCES by:
Antonietta Quinn, Resource Teacher Ashlee Bryant, Reading SpecialistKristen Giuliano, Reading SpecialistPaulette Reddick, Reading SpecialistDesigned and Printed by the BOCES 2 Printing andGraphics Services.
Plant and Animal Life CyclesSeed Dispersal
Needs of PlantsPlants have needs that help them survive. These needs include light,water, and space to grow.
Plants can’t grow too close together because overcrowding may cause themto die. When plants are overcrowded, many plants are sharing the same amount of light and water. Plantshave to send their seeds away so new plants will grow away from the parent plant.
Fruits are unique.There are many different fruitswhich move seeds from place to place in different ways. When you see afruit of a plant, examine it closely. The properties of the fruit will giveyou some clues about how it disperses its seeds.
Plants throw their seeds.Some plants move their seeds with force. The jewelweed plant is an example of a plant that has pods withseeds. When one of the pods is moved it explodes open, and this throwsits seeds away from the plant. Thisscatters the seed to a new location.
Seeds move and travel.A fl owering plant’s fruit holds the seed of the plant. The plant’s fruitcan help in moving the seeds awayfrom the parent plant. Look at the pictures below. What fruits do you see here?
Let’s look at the fruit of the maple tree more closely. The wing portion
around the seed is the fruit.3333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333
There are many different ways fruitsare moved to new locations. A plantmoves its seed by seed dispersal,which means spreading or scattering.
Animals disperse seeds. Animals help plants disperse theirseeds. A fruit may have hooks, barbs, or burrs. The fruit sticks to fur,feathers, or clothing of an animal. The fruit then moves with the animal. The fruit is licked, shaken, or picked off. It drops onto the soil in a newlocation, and the seed can grow.
The wind disperses seeds. Wind is one way seeds can bedispersed. The wind can move some seeds miles away. The new plantsthat grow will have more space to grow. They will also be able to bettermeet their other needs, like light andwater.
Water disperses seeds.Some plants grow near water, and they use the water to move their fruits. The fruits that hold the seeds fl oat on the water. They can fl oat because they are waterproof. Thewater moves the seeds to a new placeto grow.
Some fruits have parachutes that carry them far away on the wind.Dandelion and milkweed fruits have parachutes that allow them to soar. Have you ever blown the parachutes off a dandelion plant?
Other fruits have spinners that rotate in the wind. The way they spinallows them to remain in the air. Then the wind blows them far from theparent plant.