About This Chapter
TExES Science 7-12: Ecosystems and Ecological Cycles - Chapter Summary
Study this chapter's video lessons on ecosystems and ecological cycles in anticipation of taking the TExES Science 7-12 exam. The lessons consist of facts you've probably learned previously, although some information may be new to you. In part, you'll learn about the environment, ecosystems, and energy flow. Once you complete this chapter you should also be able to:
- Explain ecology levels, ecological niches, food chains, habitats and energy flow
- Understand predator/prey interactions and symbiotic relationships
- Discuss ecological succession
- Summarize the earth's biomes
- Define biogeochemical cycling and the cycles of matter
- Analyze the primary productivity of biomes
- Identify the abiotic factors of an ecosystem
Lesson instructors are experts on the subject matter, and they're available to help you if you need assistance with the concepts that are presented. You can spend as much time reviewing the lessons as you want; they're conveniently self-paced. Watch the video lessons online with your mobile device. You can also print the written transcripts and worksheets to study offline.
1. The Environment, Levels of Ecology and Ecosystems
Do you know the difference between an environment and an ecosystem? In this lesson, you'll find out what makes an environment, and what makes an ecosystem. You'll also learn what ecology is and some of the ways that scientists study ecology using organisms, populations, communities, ecosystems and even the entire biosphere.
2. Ecosystems, Habitats and Ecological Niches
Check out this video lesson to understand the many complex aspects of an ecosystem. See how animals live in habitats and survive amongst their surroundings.
3. Food Chains, Trophic Levels and Energy Flow in an Ecosystem
In this lesson, you'll learn about food chains, food webs, and the different roles that organisms play in an ecosystem. You'll also learn about how energy flows through an ecosystem.
4. Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration
You probably know that skunks can be quite stinky, bees sting and monarch butterflies are pretty, but do you know why? This lesson will introduce you to the reasons why some animals look or act the way they do and how these things relate to the predator/prey relationship.
5. Symbiotic Relationships: Mutualism, Commensalism & Parasitism
If your cat or dog has ever had fleas, you've witnessed symbiosis in action. In this lesson, learn the many types of symbiosis in biology, and how these relationships can have a positive, negative, or neutral effect on the individual species.
6. Biogeochemical Cycling and the Phosphorus Cycle
In this video lesson, we'll take a look at how elements large and small use other elements to grow. This is achieved through cycles. We'll look at macronutrients, trace elements and the biogeochemical and phosphorous cycles.
7. Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle
Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and nitrogen fixation allow the carbon and nitrogen cycles to regenerate needed substances by recycling Earth's atoms.
8. Ecological Succession: From Pioneer to Climax Communities
Just as people grow and change so, too, do ecosystems. Watch this lesson to learn about ecological succession from the beginning stages of development to a community's ultimate destination, or climax.
9. Overview of the Earth's Biomes
Biomes are defined both climatically and geographically as areas with similar factors, such as plants and animals, soil quality, and growing seasons. In this lesson, we'll learn about the five major categories of the Earth's biomes.
10. Primary Productivity of Biomes
Imagine a desert, a rainforest, and a lake. All of these areas are similar in that there are plants growing in them. These areas all vary because the amount of plant production is different based on the type of habitat. This lesson will explore the concept of primary productivity and how it varies by biomes. It will also discuss the most productive biomes and the biomes that produce the least biomass.
11. Abiotic Factors of an Ecosystem: Definition & Examples
When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.
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Other chapters within the TExES Science 7-12 (236): Practice & Study Guide course
- About the TExES Science 7-12 Exam
- TExES Science 7-12: Laboratory Safety & Management
- TExES Science 7-12: Scientific Inquiry & Processes
- TExES Science 7-12: Motion
- TExES Science 7-12: Newton's Laws
- TExES Science 7-12: Laws of Gravitation
- TExES Science 7-12: Electrical Forces & Fields
- TExES Science 7-12: Electricity & Magnetism
- TExES Science 7-12: Potential & Capacitance
- TExES Science 7-12: Work, Energy & Power
- TExES Science 7-12: Linear & Angular Momentum
- TExES Science 7-12: Thermodynamics
- TExES Science 7-12: Optics & Waves
- TExES Science 7-12: Quantum Physics
- TExES Science 7-12: Matter & Atomic Structure
- TExES Science 7-12: Periodicity
- TExES Science 7-12: Properties of Gases
- TExES Science 7-12: Chemical Bonding
- TExES Science 7-12: Chemical Equations & Stoichiometry
- TExES Science 7-12: Properties of Solutions
- TExES Science 7-12: Energy Transformations
- TExES Science 7-12: Radioactivity
- TExES Science 7-12: Oxidation-Reduction Reactions
- TExES Science 7-12: Acid-Base Chemistry
- TExES Science 7-12: Biomolecules
- TExES Science 7-12: Organic Compounds
- TExES Science 7-12: Cell Biology
- TExES Science 7-12: Prokaryotic & Eukaryotic Cells
- TExES Science 7-12: Protists, Fungi & Viruses
- TExES Science 7-12: Plant Cells
- TExES Science 7-12: Nucleic Acids & Enzymes
- TExES Science 7-12: Transcription & Translation
- TExES Science 7-12: Cell Reproduction & Division
- TExES Science 7-12: Metabolic Biochemistry
- TExES Science 7-12: Basic Genetics
- TExES Science 7-12: DNA Replication
- TExES Science 7-12: Theory of Biological Evolution
- TExES Science 7-12: Evolutionary Change on Earth
- TExES Science 7-12: Taxonomic Systems
- TExES Science 7-12: Plant Biology
- TExES Science 7-12: Plant Reproduction & Growth
- TExES Science 7-12: Animal Biology
- TExES Science 7-12: Human Organ Systems
- TExES Science 7-12: Human Reproduction & Development
- TExES Science 7-12: Homeostasis of Organisms
- TExES Science 7-12: Biology & Behavior
- TExES Science 7-12: Ecological Balance & Conservation
- TExES Science 7-12: Earth's Spheres & Internal Structure
- TExES Science 7-12: Minerals & Rocks
- TExES Science 7-12: Earth's Changing Surfaces
- TExES Science 7-12: Geologic Time
- TExES Science 7-12: The Hydrosphere
- TExES Science 7-12: Weather & Storms
- TExES Science 7-12: Solar System & the Universe
- TExES Science 7-12: The Atmosphere
- TExES Science 7-12: Learning & Instruction
- TExES Science 7-12 Flashcards