Unit 3: Plants and Animals
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Science
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3rd Grade
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Medium
+2
Standards-aligned
Shevonne Flores
Used 27+ times
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18 Slides • 16 Questions
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Unit 3: Plants and Animals
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Plant Life Cycle
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Stages of a Plants Life Cycle
Most plants come from seeds. A seed germinates when it breaks open and a seedling grows out of it.
The seedling grows into an adult plant. The adult plant makes flowers.
The flowers fall off the plant, and the plant makes fruit. The fruit holds the seeds.
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Pollination
Plants that make seeds also make pollen.
Pollination happens when pollen is moved from the male plant part to the female plant part.
Wind, water, and animals help move pollen from plant to plant.
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Mosses and Ferns
Mosses and ferns make spores instead of seeds.
These spores are part of the process for growing new mosses and ferns.
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Animal Life Cycle
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Life Cycles
An animal's life cycle begins at birth.
A life cycle is all of the changes that happen to an animal or plant until it reproduces.
Many very different animals go through similar changes.
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Frog Life Cycle
Different animals have different life cycles.
Some young animals do not look like small versions of their parents.
Their bodies change even more during their life cycles.
They go through metamorphosis or a major change in the body form of an animal during its life cycle.
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Insect Life Cycle
Most insects undergo metamorphosis. as they develop into adults.
Some go through complete metamorphosis or two stages of development between the egg and the adult.
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Insect Life Cycle
Other insects go through incomplete metamorphosis.
This is when the insects look very much like adult insects.
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Diversity
When two adult animals reproduce, the young animals maybe like their parents in many ways.
They are not exactly the same, though.
Because they can get some of their looks from each parent, they are unique.
This variety, or diversity, helps each kind of animal survive.
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Structural Adaptations
An adaptation is any trait that helps a living thing to survive.
Animals that are hunted for food are called prey. Animals that hunt prey are called predators.
Predators and prey have adaptations that help them catch food or avoid being eaten.
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Staying Safe
Defense adaptations may attack a predator’s sense of sight, smell, taste, touch, or hearing.
A bad taste, loud noise, or nasty odor is often enough to make a predator go away.
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Creature Costumes
Some animals can hide without trying. These animals are hidden by their shapes, colors, or patterns.
Such disguises are called camouflage.
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Creature Costumes
Some harmless animals look like animals that are harmful to predators. Since predators don’t know which animal is harmful, neither gets eaten.
Imitating the look of other animals is called mimicry.
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Multiple Choice
The picture below shows an example of:
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This picture shows an example of:
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Behavioral Adaptations
Behavior is anything an organism does.
Learned behaviors are behaviors that come from watching other animals or through experience.
Instinct is a behavior that an animal knows without learning it.
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Hibernation
Some animals hibernate or go into a deep, sleeplike state that helps them survive the cold winter conditions.
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Migration
Animals migrate when they move a long distance as a group from one region to another and back.
Unit 3: Plants and Animals
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