Ecosystem Review and Assessment Unit 4 Lesson 48.
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Transcript of Ecosystem Review and Assessment Unit 4 Lesson 48.
![Page 1: Ecosystem Review and Assessment Unit 4 Lesson 48.](https://reader037.fdocuments.us/reader037/viewer/2022110102/56649f005503460f94c15905/html5/thumbnails/1.jpg)
Ecosystem Review and Assessment
Unit 4Lesson 48
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Let’s review what we have learned about ecosystems.
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An Ecosystem is a group of plants and animals working together
from a particular location.
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Animals have four basic needs. They need food, shelter, water and
air.
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All animals need food but different animals need different types of
food.
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Plants need food. Plants get their food from the soil.
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Animals need water. Plants need water to survive.
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Animals need shelter.
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A shelter is protection from weather or dangers.
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Animals need protection from sun, rain, cold and other animals.
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Plants need their roots protected.
Soil shelters roots.
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Animals need air. They need the oxygen in air.
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Plants need air. Plants need the carbon dioxide in the air.
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Animals and plants need space.
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Animals can't be crowded. They need space to grow
strong.
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Plants need space for their roots to grow.
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All plants need light to grow. They can not survive without
it.
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Most animals need sunlight. Some animals can survive without
sunlight. There are fish who live in complete darkness deep at the
ocean floor.
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Take a break. Stand up and tell a friend all the needs of animals and
plants you can think of.
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Now listen as your friend tells you all the needs of plants and animals
they can think of.
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Did you both get all the needs we discussed? Rewind the video and
check.
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Let’s look at beach Ecosystems.
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Some living things at the beach live under seaweed and inside
shells to protect themselves from the heat and salty air or danger.
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Some living things burrow in the sand. The sand provides shade
and moisture.
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The mussels eat plankton found in the water.
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The starfish eat the mussels.
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The seagulls eat the starfish.
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These living things need each other.
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Crabs need algae or seaweed. Seagulls needs crabs.
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Take a break. Stand up and tell a friend what you have learned
about beach ecosystems.
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Let’s look at woodland ecosystems.
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Living things in the woodland might be hiding in trees or
under the soil.
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Animals in this ecosystem can survive cold winter months.
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Woodland animals depend on trees for food and shelter.
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Earthworms help the trees survive.
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The trees provide shelter and food for animals and birds.
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Bobcats and owls live on the animals they hunt.
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Take a break. Stand up and tell a friend what you have learned about woodland ecosystems.
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Let’s look at desert ecosystems.
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The desert ecosystem is hot and dry. Living things in the
desert can survive in dry heat.
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Deserts are very hot and dry all year. Plants and animals that live there are
able to survive on very little water.
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Desert plants are different
from plants in other
ecosystems because they have to live
and grow with very little
water.
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Desert plants have shallow roots so that they can soak up any rain
that falls in the dry desert.
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Desert plants save water in their stems and have sharp needles to keep animals from eating them.
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Many of these plants produce flowers or fruit. This is food for many
animals.
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Most desert animals are nocturnal, that means they hunt for food at
night when it is cooler.
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Many desert animals fur, feathers, or skin is light in color because the light color reflects the hot desert sun. This helps keep the animal cooler.
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The tortoise and the jack rabbit eat plants in the desert. They build their
burrows near plants for shelter and shade.
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The coyote eats the jack rabbit and
the tortoise and many other
animals. It also eats berries and
flowers.
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The antelope squirrel eats the plants in the desert. The rattlesnake eats
antelope squirrels and other rodents and reptiles.
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The Roadrunner eats rodents, like the
antelope squirrel, birds. It eats snakes, like the rattlesnake and other
reptiles. The roadrunner perches on
desert plants.
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Take a break. Stand up and tell a friend what you have learned
about desert ecosystems.
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How do people hurt the ecosystems?
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People throw their trash in the ecosystems which can harm the
living things.
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Sometimes people hurt the environment. People can cause
fires and oil spills.
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Too many trees get cut down to make room for people.
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Animals lose homes when too much land is cleared or
destroyed.
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Humans hurt clean air and water with pollution. People can also
waste water.
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People create too much trash and we don’t know where to put it all.
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How do people help the ecosystems?
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People can clean up trash from ecosystems.
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People can help our environment by recycling. When we reuse things we
do not create as much trash.
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People can help the woodlands by planting trees to create homes
and food for the animals.
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Planting trees and plants also help people. We need oxygen.
Plants give us oxygen.
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People can conserve water. That means not waste water.
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Take a break. Stand up and tell a friend how people can harm and
help the environment .
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We have finished unit 4. We will take the assessment. I will read the questions. If you need more time stop the video at any time.
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Pat your back. You just finished Unit 4 Ecosystems.
Great job!
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In our next unit we will learn more about plants and animals.
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Keep observing the world around you!