Grade 5 Science Relationships in Ecosystems PDF

 Ajyal Al-Mawaheb school Science Semester 1 Grade 5 chapter 3 lesson 1 Relationships in Ecosystems Chapter 3 Reactions in Ecosystems Lesson 1 Relationships in Ecosystems Lesson...

 Ajyal Al-Mawaheb school Science Semester 1 Grade 5 chapter 3 lesson 1 Relationships in Ecosystems Chapter 3 Reactions in Ecosystems Lesson 1 Relationships in Ecosystems Lesson 2 Adaptation and Survival How do organisms interact? 1 Ajyal Al-Mawaheb school Science Semester 1 Grade 5 chapter 3 lesson 1 Relationships in Ecosystems Chapter vocabulary Ecosystem Habitat Carrying capacity Adaptation Commensalism Camouflage 2  Ajyal Al-Mawaheb school Science Semester 1 Grade 5 chapter 3 lesson 1 Relationships in Ecosystems Lesson 1 Relationships in Ecosystems Lesson vocabulary Ecosystem Limiting factor Population Carrying capacity Habitat Niche Symbiosis Mutualism Commensalism Parasitism Main idea A biotic factor and interactions between organisms control the size of populations in a community. 3  Ajyal Al-Mawaheb school Science Semester 1 Grade 5 Chapter 3 lesson 1 Relationships in Ecosystems Why do organisms compete? An ecosystem includes all living and nonliving things in an environment. Life in an ecosystem is constant struggle for food, water, space, and other resources are restricted. All living organisms struggle to get their share of each resource. This fight for limited resources is called competition. Ultimately, the survival of populations comes down to resources. A limiting factor is any resource that restricts the growth This pond is covered with algae of populations. Water, food, temperature, weather, soil types, space to grow, shelter, sunlight, rainfall and temperature are limiting factors. Limiting factors determine the carrying capacity. The carrying capacity is the greatest number of individuals within a population that an ecosystem can support. Q: Write the scientific term 1) All living and nonliving things that existed in an environment (……………………..…………………………) 2) All living organisms struggle to get their share of limited resources in the environment. (……………………………….……………………) 4  Ajyal Al-Mawaheb school Science Semester 1 Grade 5 Chapter 3 lesson 1 Relationships in Ecosystems How do organisms avoid competition? Organisms avoid competition by having a specific territory and a unique role within its ecosystem. A habitat is the physical place where an organism lives and hunts for food. A niche is the special role that an organism plays in a community. For example, these birds have different niches. Eat insects under Sips nectar from Eat insects by Eat insects on Sips nectar from tree barks tube flowers crashing twigs leaves and barks high top flowers Q: complete 1) …………………………………………………….. is any resource that restricts the growth of populations. 2) ………………, food, temperature, ……………………., soil types, space to grow, shelter, ………………………, rainfall and temperature are limiting factors. 3) The carrying capacity is the greatest number of ……….…………within a population that an ……………………….. can support. 4) A ………… is the special role that an organism plays in a community. How do organisms benefit from interactions? Living things in an ecosystem depend on each other. For example, animals in an ecosystem depend on plants and other producers for food, plants depend on animals for carbon dioxide. Symbiosis is a relationship between two or more kind of organisms that lasts over time. Mutualism and commensalism are types of symbiosis. 5  Ajyal Al-Mawaheb school Science Semester 1 Grade 5 Chapter 3 lesson 1 Relationships in Ecosystems Mutualism Mutualism is a symbiotic relationship that benefits both organisms. Pollinator and a flowering plant, ants and acacia trees, and lichens are examples of mutualism. Ants are defending an acacia tree Lichens: The fungus provides the from other insects. An acacia nutrients and a home. The alga provides home and food for ants provides food and oxygen Q: Define “mutualism” with examples ……………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………. Commensalism Commensalism is a symbiotic relationship that gets benefit one organism without harming the other. Remora fish attach to shark, and orchids growing on trees in a rain forest are examples of commensalism. Remora fish attach to shark for food Orchids growing on trees in a rain and protection without harming shark forest without harming trees 6  Ajyal Al-Mawaheb school Science Semester 1 Grade 5 Chapter 3 lesson 1 Relationships in Ecosystems Q: Define “commensalism” with examples ……………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………….. What are parasites? Parasitism is a symbiotic relationship where one organism benefits, and the other is harmed. A parasite lives in or on a host organism and benefits from the relationship. Parasites are very harmful for the host organism. A magnified view of a wood tick on A magnified view of a tapeworm human skin head (Cestoda ) 7 Ajyal Al-Mawaheb school Science Semester 1 Grade 5 Chapter 3 lesson 1 Relationships in Ecosystems Lesson dictionary Parasitism Commensalism Mutualism Niche ……………………………………………. ……………………………………………. ……………………………………………. ……………………………………………. 8