PowerPoint Presentation

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Mr. Harpers science mini lessonwith audio read along

Seed DispersalHow plants move seeds to new placesClick on the speaker icons to hear the audio

vcnmMost plants reproduce by making seeds and dropping them on the ground.

vcnm But new plants need sunlight and room to grow.

vcnm If the seeds stay near the parent plant, the new plants might be in the shade and not have enough light to grow very well.

vcThe new plants may be too crowded to grow properly.

vcParent plants need a way to disperse their seeds some distance away so the new plants can thrive.

vcDisperse is a word that means to scatter or send things away in different directions. It is the opposite of gather.

vcBut plants cant walk around to put seeds in different places. How can a plant disperse its seeds?

vcPlants have adapted several ways to disperse their seeds.

vcSome seeds are also nuts that animals like to eat. Some animals hide nuts for later by burying them in the ground.

vcIf the squirrel forgets where he buried the acorn, he has planted an oak tree that may produce thousands of acorns.

vcSome plants surround their seeds with tasty fruits.

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Animals eat the fruit then walk away and drop the seeds when they poop. Many seeds can still grow after passing through an animals digestive track.

vcBirds may carry seeds far away from the parent plant.

14vcSome plants put their seeds in sticker burrs that can grab onto passing animals.

vcThe animals might walk a long way before the burrs fall off.

vc Some plants make seeds that can travel on the wind. Dandelion seeds act like little parachutes that only take off when the wind blows them.

vcCocoanut seeds can float in the ocean for weeks. The cocoanut may wash up on a beach thousands of miles from the parent tree and grow into a new tree.

vcPlants have adapted several ways to disperse their seeds.

vcTo learn more about plants check out this Brainpop cartoon.

Brainpop junior : brainpopjr.comPlant Life Cycle

vcIf you dont know the user name and password that Pacoima Charter students use to log on to Brainpop.com from anyplace in the worldask Mr Harperor ask your teacher.or ask any student at Pacoima Charter.

Everyone should know the Brainpop user name and password.123cat123dog