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Define Atom
- Fundamental building blocks of ALL matter. Living and non-living.
- Smallest unit of an element that still retains the element’s properties.
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Define MOLECULE
- Two or more joined atomsof the same or different elements.
- The “molecules of life” are complex carbohydrates, lipids, proteins, DNA, and RNA.
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Define CELL
- Smallest unit that can live and reproduce on its own or as part of a multicellular organism.
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Tissue
Organized cells and substances that interact in a specialized activity.
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ORGAN
- Two or more tissues interacting in some task.
- A parrotfish eye, for example, is a sensory organ used in vision.
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ORGAN SYSTEM
Organs interacting physically, chemically, or both in some task. Parrotfish skin is an organ system with tissue layers, organs such as glands, and other parts.
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Multicelled Organism
Individual made of different types of cells. Cells of most organisms, including this Red Seaparrotfish, are organized as tissues, organs, and organsystems.
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Population
- Group of single-celled or multicelled individuals of the same species occupying a specified area.
- This is a fish population.
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Community
- All populations of all species occupying a specified area.
- For Example:
- Corral Reef
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Ecosystem
- A community that is interacting with its physical environment. It has inputs and outputs of energy and materials.
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Biosphere
- All regions of the Earth’s waters, crust, and atmosphere that hold organisms.
- Earth is a rare planet; without its abundance of free-flowing water,there would be no life.
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All living things have 3 similar characteristics.What are they?
- Require energy and nutrients.
- Sense and respond to change.
- Reproduce with the help of DNA.
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Energy
The capacity to do work.
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Nutrient
Substance that is necessary for survival, but that an organism can’t make for itself.
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Producers
- Organisms that make their own food using energy andsimple raw materials from the environment
- Example: Plants
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Consumers
- Organisms that get energy and carbon by feeding on tissues, wastes, or remains of other organisms.
- Example: Animals
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Decomposers
Obtain energy by breaking down remains and wastes.
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Homeostasis
- Set of processes by which an organism keeps its internal conditions within tolerable ranges.
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Receptor
Molecule or structure that responds to a stimulus.
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Growth
Increase in size, volume, and number of cells in multicelled species.
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Development
Multistep process by which the first cell of a new individual becomes a multicelled adult.
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Inheritance
Transmission of DNA from parents to offspring.
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Energy Flow Summary
- • Usually starts with energy from the sun
- • Transfers from one organism to another
- • Flows in one direction
- • Eventually is lost as heat
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Scientific Name
Each species is given a unique two-part name that includes genus and species names (system devised by Carolus Linnaeus).
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Species
Genus
A type of organism
Group of species that share a unique set of traits
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8 Levels of Classification
- Kingdom
- Phylum
- Class
- Order
- Family
- Genus
- Species
(Dumb) Kids Pick Candy Over Fancy Green Salads)
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One system sorts all organisms into one of three domains:
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Eukaryotes
- Single- or multicelled
- Nucleus
- Larger, more complex
- (Fungi, Protists ,Plants, Animals)
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Prokaryotes
- Single celled
- No nucleus
- Smaller, less complex
- (Archaebacteria, Eubacteria)
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Protists
Single celled to multi-celled colonial eukaryotic organisms- that are not plants, animals, or fungi
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Archaea
- Prokaryotes
- Live in extreme environments
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Critical Thinking
Mental process of judging the quality of information before deciding whether or not to accept it.
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Science
The systemic study of nature
- How Science Works:
- Researchers make and test potentially falsifiable predictions about how the naturalworld works.
- Generally, scientific inquiry involves forming a hypothesis (testable assumption) about an observation then making and testing predictions based on the hypothesis.
- A hypothesis that is not consistent with the results of scientific tests is modified or discarded!!
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Experimental Group
A group of objects or individuals that display or are exposed to a variable under investigation.
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Control Group
A group of objects or individuals that is identical to an experimental group except for one variable!
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