Animal Growth and Reproduction
Science - Fourth Grade
Life Cycles of Plants and Animals
Multimedia Lesson
Life Cycles of Plants and Animals
Presentation
Frog Life Cycle Matching Interactive
Interactive
Butterfly Life Cycle Matching Interactive
Interactive
Dragonfly Life Cycle Matching Interactive
Interactive
Variation Interactive Matching Activity
Interactive
Adaptation Interactive Matching Activity
Interactive
Animal Growth and Reproduction
Study Guide
Animal Growth and Reproduction
Quiz
Animal Growth and Reproduction
Flash Cards
Animal Growth and Reproduction
Worksheet
Animal Growth and Reproduction
Game
Animal Growth and Reproduction
Vocabulary List
Animal Growth & Reproduction
Flip Chart
Study Guide Animal Growth and Reproduction
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ANIMAL GROWTH AND REPRODUCTION Life Cycles A life cycle is the stages of development an organism goes through starting from an egg to growing into an adult. Living organisms each have their own unique way of reproducing, giving birth, growing, and developing. Organisms such as mammals and birds have simple life cycles. These organisms look similar to their parents when they are born. Many organisms, however, have complex life cycles and do not look like their parents when they are born. Lesson Checkpoint: What is a life cycle? Metamorphosis Metamorphosis is the process of a rather sudden change in the appearance and form of an animal while growing into an adult. Organisms that go through incomplete metamorphosis go through three stages of development: egg, nymph, and adult. Lesson Checkpoint: What are the three stages of development in incomplete metamorphosis? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Organisms that go through complete metamorphosis go through four stages of development while include: egg, larva, pupa, and adult. Most insects go through complete metamorphosis. Lesson Checkpoint: How many stages are in complete metamorphosis? Animals produce offspring in a variety of ways. • Many animals have live births, which is when their offspring develop inside the female parent and then the parent gives birth to the live young. This type of development is called internal development. • Other organisms, like chickens and frogs, lay eggs instead of having live births. External development is when an organism develops outside of an organism. Animal life cycles vary in how long they take. Some animals have short life cycles while others take longer. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Reproduction Organisms also reproduce in several different ways. Reproduction is the creation of a new individual or individuals from existing individual or individuals. Fertilization Fertilization is the union of a male sperm and a female egg to form an offspring. This is one way animals reproduce. Internal fertilization takes place inside an organism. Fertilization does NOT need to take place in every organism in order for reproduction to occur. A single individual can produce offspring without fertilization from another organism without fertilization taking place. This is called asexual reproduction. Some animals develop inside the parent organism, as in those who have live birth, and it is called internal development. External development is when an organism develops outside of an organism. Budding is the process of an offspring growing out of the body of the parent. Hydras are an example of an organism that reproduces asexually through this process. If a piece of a parent is detached, and it can grow and develop into a completely new individual, this process is known as regeneration. Some types of worms and starfish can regenerate in this way. Lesson Checkpoint: What are two ways an organism can reproduce asexually, without fertilization occurring? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Traits Animals have both inherited and acquired traits. An inherited trait is a characteristic or quality that an organism is born with. An acquired trait is a trait one learns through its experiences but is not born with. Heredity is the passing of traits and characteristics from parents to their offspring. Lesson Checkpoint: What is the difference between an acquired and inherited trait? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Table Of Contents: Life Cycles
1. Lesson Objectives
2.1. Life Cycles of Plants and Animals
2. Engage
3.1. Planting a Seed
3.2. A Growing Plant
3.3. Butterfly
3. Explore
4.1. Plants and Animals
4. Explain
5.1. Plants
Plants are living things that need water, air, nutrients and sunlight to grow. There are two main kinds of plants - plants with flowers and plants without flowers. Plants with flowers include fruit trees and any plant with flowers. Plants without flowers include pine trees, mosses and ferns.
5.2. Main Parts of Plants
A plant has many important parts, such as roots, stem, leaves and flowers. Each part of the plant has different functions that make it possible for the plant to live.
5.3. Roots
Roots help support the plant by anchoring it into the ground. Roots have tiny hairs that absorb nutrients from the soil, which a plant needs to grow. These root hairs also take in water from the soil, which a plant needs to live and grow.
5.4. Stem
A plant's stem is used to support the plant. The stem allows the plant's leaves to reach above the soil so that they may take in the sunshine. A plant's stem carries the water and nutrients that are taken in by the plant's roots to the rest of the plant.
5.5. Leaves
Leaves are the parts of a plant where the plant's own food is made. They use sunlight, air, water and nutrients from the soil to make their own food through a process called photosynthesis.
5.6. Flowers
The main job of the flower of a plant is to make seeds. New plants grow from these seeds. Some plants form fruit to help protect their seeds.
5.7. Parts of a Plant Interactive Matching Activity
5.8. What a plant needs to grow...
Plants need many essential things in order to grow, such as water, air, nutrients, sunlight, and warm temperature. Plants need their space too!
5.9. Germination
Germination is the process by which the plant embryo inside a seed grows and a seedling grows above the soil. A seedling is a young plant that is in its early stages of growth.
5.10. Plants have different life cycles...
Living things have different life cycles. A life cycle is the way a living thing grows and changes. A flowering plant's life cycle describes the steps a plant takes to grow and become an adult plant.
5.11. Bean Plant Life Cycle
A bean plant's life cycle includes four stages: 1. Seed - contains the embryo, which will develop into the plant; 2. Sprouting seed - germinates or grows root and stem; 3. Seedling- its first leaves make food 4. Mature plant- can make seeds that will begin the life cycle again!
5.12. Bean Plant Life Matching Interactive
5.13. Animals
There are many different kinds of animals. Animals are grouped into two kinds - animals with backbones and animals without backbones.
5.14. Animals with backbones
Animals with backbones include mammals, birds, fish, amphibians and reptiles.
5.15. Animals without backbones
Most kinds of animals do not have backbones. Animals without backbones include insects, worms, crabs, spiders and many others.
5.16. Animal Growth & Reproduction
Animals produce offspring in a variety of ways. For example, many animals have live births. The offspring develop inside the female parent which then gives birth to the live young. Other organisms, like chickens and frogs, lay eggs instead of having live births. Animal life cycles vary in how long they take.
5.17. Frog Life Cycle
Like all amphibians, frogs spend their lives near water because they must return to water to lay their eggs. The four stages of a frog's life cycle include: 1. Frog eggs are laid in water. 2. Tadpoles hatch from the eggs. They breathe with gills and swim using a tail. 3. The froglet still has part of its tail and starts to breathe using its lungs. 4. By the time a froglet becomes an adult, its tail is reabsorbed.
5.18. Frog Life Cycle Matching Interactive
5.19. Butterfly Life Cycle
Butterflies and moths go through complete metamorphosis and undergo four stages of development: egg, larva (caterpillar), pupa (Chrysalis), and adult.
5.20. Butterfly Life Cycle Matching Interactive
5.21. Dragonfly Life Cycle
Most insects go through complete metamorphosis, but some, such as dragonflies, go through incomplete metamorphosis. This life cycle includes three stages of development: egg, nymph, and adult.
5.22. Dragonfly Life Cycle Matching Interactive
5.23. Inheritance of Traits
Have you ever wondered why offspring , the young of a plant or animal, often look like their parents? This is due to the inheritance of traits, which means that parents pass on their traits to their offspring. Animals inherit traits such as the shape and color of their body parts. Plants inherit traits such as leaf shape and flower color.
5.24. Animal Variation Due to Inherited Traits
Some offspring may appear different than one or both parents. This is because the offspring receive traits from both parents resulting in a unique combination that is different from either parent. Variations in humans are height and eye color. A child's parents may both have brown eyes, yet the child could have blue eyes.
5.25. Variation Due to Environment
Characteristics of plants and animals can be affected by their surroundings, climate or diet. For example, if you eat too much you will become heavier, and if you eat too little you will become lighter. A plant in the shade of a big tree will grow taller as it tries to reach more sunlight.
5.26. Variation Interactive Matching Activity
5.27. Adaptation
An adaptation is a trait or characteristic that helps a living thing survive in its environment. For example, it takes special adaptations to be able to live in a very cold environment. Polar bears have thick blubber and dense fur to help keep them warm.
5.28. Adaptation Interactive Matching Activity
5.29. Life Cycles of Plants and Animals
5. Virtual Investigation
6.1. Normal Conditions
6.2. No Light
6.3. No Water
6.4. Too Much Water
6.5. Analysis
6. Evaluate
7.1. Life Cycles of Plants and Animals
7. Lesson Summary
8.1. Life Cycles of Plants and Animals
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