Slide 1 / 115 Slide 2 / 115 3 rd Grade PSI Growth and Development of Organisms 2015-12-06 www.njctl.org Slide 3 / 115 Table of Contents Click on the topic to go to that section Life Cycles · Plant Life Cycles · Animal Life Cycles · Works Cited ·
Slide 4 / 115 Set Up: Germination Lab Before we begin, we need to set up the Germination Lab! You will plant a seed and observe how it changes every day. Source: Wikimedia Commons. Author: Bluemoose. Slide 5 / 115 Life Cycles Return to Table of Contents Slide 6 / 115 Living and Nonliving Think back to what you already know about living and nonliving things. What is the difference between a living thing and a nonliving thing? Discuss as a class and write your ideas below.
Slide 7 / 115 Living and Nonliving Categorize each of the following as being either living or nonliving. Move each item into the appropriate box. cloud river vine fire bug baby animal Living Things Nonliving Things Slide 8 / 115 Characteristics of Living Things There are four characteristics that all living things have. Click below to watch a short video about golden retriever puppies. As you watch, take notes about what makes the puppies considered living things. Write all of your ideas in the box. Click here to watch a video about golden retriever puppies. Slide 9 / 115 Characteristics of Living Things Think about all of the ideas your class has had about what makes something a living thing. Can you take your ideas and place them into 4 different categories?
Slide 10 / 115 Characteristics of Living Things No matter how different living things look, they all have these same characteristics in common: They eat and use energy. · They grow and develop. · They reproduce. · They can interact with their environments. · Source: Wikimedia Commons. Author: # # # Source: Wikimedia Commons. Author: Justin. Slide 11 / 115 Eat / Use Energy Can you survive if you stop eating? Eating gives us energy! Just like you, all living things need energy to survive. Source: Wikimedia Commons. Author: Epipelagic. Source: Wikimedia Commons. Author: Willow. Animals eat lots of Plants do not eat food - different types of food in they make their own! They order to get energy and use the energy from the survive. sun to make food. Slide 12 / 115 Grow / Develop All living things grow into an adult version, although how they do so varies greatly! Source: Wikimedia Commons. Author: Mdf. Source: Wikimedia Commons. Author: Marquard. Source: Wikimedia Commons. Author: Famartin. Source: Wikimedia Commons. Author: Culos.
Slide 13 / 115 Reproduce All living things reproduce, or make offspring. Source: Wikimedia Commons. Author: Chaurasia. Source: Wikimedia Commons. Author: Dilmen. Plants reproduce from seeds. Animals reproduce in many different ways. Some hatch from eggs and some develop in the mother's body. Slide 14 / 115 Interact with the Environment What would happen if you walked outside in a shirt and shorts on a very cold day? You would probably start shivering and go back inside right away! Your body interacted with the environment. You responded to the cold temperature by shivering. Source: Wikimedia Commons. Author: Sagdejev. Slide 15 / 115 Interact with the Environment Living things interact with the environment in many different ways! Can you think of any other examples of how living things interact with (or respond to) the environment? Write them below.
Slide 16 / 115 Interact with the Environment Animals interact with their environments in order to survive. This impala heard a noise and froze, trying to determine if danger is near. If so, she will run away quickly. Source: Wikimedia Commons. Author: Karim. Slide 17 / 115 Interact with the Environment Plants are also able to interact with their environments. The flower and leaves of this sunflower will move in the direction of the sun as it moves across the sky. It does this so that it can absorb the most amount of sunlight as possible to make food. Source: Wikimedia Commons. Author: Pamri. Slide 18 / 115 1 Why is a rock considered nonliving? A A rock is able to reproduce. B A rock cannot respond to its environment. C A rock uses energy. D All of the above.
Slide 19 / 115 2 Plants do not interact with their environments. True False Slide 20 / 115 Growth Click below to watch a video of the growth of an acorn. Then, put the pictures into the correct order for an acorn's life. Click here to watch an acorn grow from the seed to the small oak tree. Slide 21 / 115 Life Cycle All living things follow the same pattern of life. Living things begin small and grow into an adult stage. As an adult, living things can reproduce, creating new copies of themselves. Eventually, all living things die. This process is called a life cycle.
Slide 22 / 115 Life Cycle All living things go through a life cycle. The 4 steps of the life cycle are: birth · growth · reproduction · death · Source: Wikimedia Commons. Source: Wikimedia Commons. Author: Culos. Author: Marlin. Source: Wikimedia Commons. Source: Wikimedia Commons. Author: Descouens. Author: Johansson. There are many different plants and animals that live their lives in different ways. Despite this, they all share these four steps of a life cycle. Slide 23 / 115 3 What types of living things go through a life cycle? A Some living things B Only non-living things C All living things Slide 24 / 115 4 Arrange the steps of the life cycle in the correct order. C Growth D Reproduction A Birth B Death
Slide 25 / 115 Populations Change in Size A group of a living things that lives in a certain area is called a population. Populations change over time. Sometimes they grow larger. Sometimes they grow smaller. In some situations, the population becomes so small that it disappears. When this happens, we say that the population has gone extinct. Due to pollution, global warming and fungal skin infections, the golden toad went extinct in 1989. Source: Wikimedia Commons. Author: Smith. Slide 26 / 115 Populations Change in Size The life cycle stages are: Birth Growth Reproduction Death Two of the stages increase population size, while one decreases population size. Move the stages into the correct boxes. Decrease Population Increase Population Slide 27 / 115 Births Increase Populations When new living things are born, a population becomes bigger. The dots below show a population of squirrels. How large is the population? ________ In the next year, 5 new squirrels are born. Draw 5 new dots below. Now how large is the population? ________
Slide 28 / 115 Deaths Decrease Populations When living things die, a population becomes smaller. Look at our squirrel population below. There were 5 births in the last year, bringing the population up to a size of 15. In the next year, there are 7 deaths. Cross out 7 dots below. What is the population size? _______ Slide 29 / 115 Populations Change in Size Births and deaths determine how a population changes in size. For example, let's consider a larger squirrel population. Initially there are 50 squirrels in a stand of trees. During the next year, 15 squirrels die and 10 squirrels are born. What is the new population size? Did the population increase or decrease? First, let's think about how many squirrels died. 50 - 15 = 35 squirrels Now, let's think about how many squirrels were born. 35 + 10 = 45 squirrels At first, there were 50 squirrels and now there are 45. The population decreased in size. Source: Wikimedia Commons. Author: Karim. Slide 30 / 115 Populations Change in Size When more individuals die than are born, a population decreases. When more individuals are born than die, a population increases. Suppose that there are 15 ducks that live near a pond. In one year, 5 of the ducks die. How many ducks will need to be born in order for the population to increase? For the population to increase, there needs to be more births than deaths. So, at least 6 ducks need to be born in order for the population to increase. Source: Wikimedia Commons. Author: Pingstone.
Slide 31 / 115 5 If the number of births equals the number of deaths, a population will increase in size. True False Slide 32 / 115 6 In a forest, there are 100 oak trees. Over the course of several years, 7 oak trees die and 13 new oak trees grow. What is the new population size? Slide 33 / 115 Living Things Of all the stages of the life cycle, which is most important for a specific living thing to survive over long periods of time? For example, humans have been on Earth for over 5 million years. Which stage of the life cycle has allowed humans to continue to exist? Discuss with a partner and then click in the box below. Reproduction Source: Wikimedia Commons. Author: Elf.
Slide 34 / 115 Reproduction Reproduction is necessary for living things to continue to exist over time. Source: Wikimedia Commons. Author: Locaguapa. When living things die faster than they can reproduce, they may go extinct. Slide 35 / 115 Case Study: Arabian Oryx The Arabian oryx is a medium-sized antelope that originally lived on the Arabian Peninsula. Source: Wikipedia. Author: Western Region. Source: Wikimedia Commons. Author: Afrogindahood. Slide 36 / 115 Case Study: Arabian Oryx Unfortunately, the Arabian oryx was hunted to extinction in the wild by 1972. If the oryx were about to go extinct, what does this tell you about the Arabian oryx and reproduction? They were being killed faster than they were able to reproduce. This caused their population to decrease drastically until they finally went extinct.
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