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Plants and animals depend on each other. (teach 2nd/3rd grade)


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Shows how animals and plants are dependent on one another for survival at about the 2nd or 3rd grade level.

Plants and animals depend on each other. (teach 2nd/3rd grade)

  1. 1. Interdependency Big word Can you say it? Do you know what it means?By Moira Whitehouse PhD
  2. 2. Let’s first look at the word“dependent” which is foundwithin this big word. What doesit mean?A tiny baby before it can crawl,walk or talk is pretty muchdependent on grownups tomeet all its needs.
  3. 3. Someone mustgive the tinybaby food andwater.
  4. 4. Someone must puton the baby’s clothesand wrap it in ablanket to keep it.warm Gown-ups provide a home for the baby.
  5. 5. The tiny baby is completelydependent on others to satisfyits needs.The baby needs someone elseto provide it food, water andshelter.
  6. 6. But what about the people who take careof the baby? Are they dependent on thebaby for any of their needs?No, babies cannot take care of their parents.Babies and parents are not interdependent.Things that are interdependent depend oneach other to satisfy their needs.Now let’s look at some animals that areinterdependent, they are dependent uponeach other.
  7. 7. Interdependency of crocodiles and plovers: A crocodile invites plovers into its mouth but not to eat them. The plover picks meat out of the crocodile’s teeth keeping them clean and free from infection. The hungry bird, in turn, gets a “free” meal.
  8. 8. The two animals depend on oneanother—they are interdependent.What about plants and animals,are they interdependent—do theydependent on one another?First let’s look at animal side ofthat question. Are animalsdependent upon plants?
  9. 9. What doanimals likebison andantelopeeat?
  10. 10. What doanimals likegiraffe eat?Animals such asbison, antelopeand giraffe eatblades of grassor leaves whichare “p _ _ _ _ _”.
  11. 11. One of these birds is eating berriesfound on a plant; the other seedsfrom a flower.
  12. 12. Both thehummingbirdand butterflydrink a sweetliquid callednectar that isfound in someflowers.
  13. 13. These plant eating animals (herbivores) aredependent on plants for _________.What about animals that eat otheranimals? (carnivores)
  14. 14. Carnivores eat animals such as rabbits andmice but these animals eat plants. So inthe long run, all animals, even carnivoresare “d_ _ _ _ d _ _ t” on plants for food.What are some things besides food doanimals need to survive?
  15. 15. What about an animal’s need for oxygen?Do plants help provide oxygen for animals? Remember when plants make food they take in carbon dioxide from the air and give off oxygen. Animals in turn breathe in that oxygen.
  16. 16. Plants add oxygen to the air. Withoutplants to replace the oxygen in air thatanimals need, animals would die.So we know that animals depend on plantsfor food and oxygen. But what else?
  17. 17. Birds often build nests in ________.The motherdeer hides herfawn inthe________.
  18. 18. Some birds useholes in cacti ortrees for theirhomes.Small animals likepossums live inhollow trees.
  19. 19. These animals are dependent on plants tosatisfy their need for “s _ _ l _ _ r.” Livingin trees, cacti and grass protects theanimals and their babies from weather andfrom their enemies.So animals are always dependent on plantsfor “f_ _ _” and “o_ y _ _ n” andsometimes for “sh_ _ _ _ _.”What about their need for water?.
  20. 20. Most animals find their drinking waterfrom puddles, ponds, river or lakes.However, some animals that live in deserts,where there is very little water, have aharder time. They must get their water byeating plants.Tortoises get waterfrom cacti and otherplants.
  21. 21. Let’s review: Can you remember the waysthat animals depend on plants?Which living things make food?a. animals b. plants Which living things do not make food? a. animals b. plants Animals either eat “_ _ _ _ t _” or they eat animals that do eat “_ l _ _ _ _”.So without plants, animals would nothave any “f_ _ _” and would die.
  22. 22. While making food, plants give off“o_ _ _ _ _” which animals need to live.In places with little rainfall, some animalsget their water froma. drinking out of wellsb. digging pondsc. eating plants
  23. 23. Some animals dig holes in the ground forshelter from the weather and protectionfrom enemies. Can you think of threekinds of shelter animals might build orfind in or on plants?1. _______________________________2. _______________________________3. _______________________________
  24. 24. We have seen how animals use plants tosatisfy many of their needs. How aboutanimals? Do they help plants stay alive?Do plants need animals for food?Plants do not need animals for foodbecausea. they don’t need foodb. they get their food from the soil.c. they make their own food
  25. 25. We know that plants need carbon dioxideand water to make food. Do animalshave anything to do with providingcarbon dioxide for animals?Yes. Rememberanimals breatheout carbondioxide whichplants can use tomake food.
  26. 26. Animals don’t provide much water forplants, but there other things that animalscan do to help plants survive?One thing is that they help plantsreproduce by carrying the pollen from themale part of the plant to the female part sothat the flower can make seeds. Withoutthis important work, usually done byinsects or small birds and animals, manyplants could not make new plants.
  27. 27. Insects getting food by drinkingnectar from the flowers and at thesame time moving the pollengathered on their bodies onto otherflowers where needed by the plantto make seeds.
  28. 28. Animals also help plants by carrying the seedsof the plant to a different place.Some plants, like burrs, have sticky barbs thatget tangled in animal fur or feathers and arethen carried far away to new places where theplant has room to grow.
  29. 29. Some animals like squirrels bury seeds tosave for eating when it is cold. However,if they do not return to get the it, theseed can grow into a new plant.
  30. 30. So in review:Animals help plants by:a. putting oxygen into the air.b. putting carbon dioxide into the air.Some animals help plants by:a. carrying pollen so the flower can make new seeds.b. carrying the plant’s seeds to a new place to grow.c. making food for the plant.d. Both a and b.
  31. 31. Some mother andfather birds like theserobins bring food tothe babies and build anest to protect themfrom enemies andbad weather. Thebaby birds are“_ _ p _ _ d _ _ _” ontheir parents forsurvival.
  32. 32. However, the robin’s parents are notdependent on the the babies for survival.So the babies and parents are not:a. relatedb. interdependentc. members of the same familyd. the same color
  33. 33. Tiny birds eat ticks and lice that live on a zebra’sskin. The bird gets food while zebra gets rid ofbothersome biting insects.We say these two animals are interdependentbecause:a. Only the bird depends on the zebra.b. Only the zebra depends on the bird.c. They both depend on one another.
  34. 34. Plants and animals are said to beinterdependent because:a. Only plants depend on animals forsurvival. Animals do not depend onplants.b. Only animals depend on plants forsurvival. Plants do not depend onanimals.c. Plants and animals both depend onone another for survival.