Science 7 2nd Quarter

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    • Competition - Relation where two organisms fight for their benefits.
    • A microscope is an instrument of science used to magnify smaller species or specimens.
    • The body tube of a microscope holds the objective lenses and the ocular lens at the proper distance.
    • The nose piece of a microscope holds the objective lenses and can be turned to increase the magnification.
    • Objective lenses in a microscope increase magnification, usually from 10x to 40x.
    • Stage clips in a microscope hold the slide/specimen in place on the stage.
    • The diaphragm in a microscope controls the amount of light on the slide/specimen.
    • The light source in a microscope projects light upwards through the diaphragm, the specimen and the lenses.
    • The ocular lenses in a microscope magnifies the specimen image.
    • The arm of a microscope is used to support the microscope when carried and holds the body tube, nose piece and objective lenses.
    • The stage in a microscope supports the slide/specimen.
    • The course adjustment knob in a microscope moves the stage up and down (quickly) for focusing your image.
    • The fine adjustment knob in a microscope moves the stage slightly to sharpen the image.
    • The base of a microscope supports the microscope.
    • The scanner in a microscope, usually marked 4x, combined with the eyepiece lens, provides the lowest magnification power.
    • Tissue is a group of associated, similarly organized/merged cells that perform specialized functions in order for the organism to survive.
    • The low power objective (LPO) in a microscope, usually marked 10x, is most helpful in analyzing glass slide samples.
    • The human body is made up of eleven organ systems; Integumentary System, Muscular System, Skeletal System, Circulatory System, Nervous System, and more.
    • Types of Organelles include Cell Membrane, Nucleus, Ribosomes, Lysosomes, Vesicles, Vacuoles, Mitochondria, Cell Wall, Nuclear Membrane, Nucleolus, Cytoplasm, Smooth ER, Rough ER, Mitochondrion, Golgi Apparatus.
    • There are four basic types of tissues; Epithelial Tissues, Connective Tissues, Nervous Tissues, and Muscle Tissues.
    • Organelles are organs of a cell that keep it alive.
    • Robert Brown was a Scottish botanist and paleo botanist who made important contributions to botany largely through his pioneering use of the microscope.
    • An organ is a group of different tissues working together.
    • Johannes Purkinje coined the term "protoplasma" for the fluid substance of a cell.
    • Felix Dujardin proposed that a new group of one-celled organisms be called Rhizopoda in 1834.
    • There are two types of cell; Prokaryotes/Prokaryotic Cell and Eukaryotes/Eukaryotic Cell.
    • An organ system is a group of organs cooperating to perform specialized functions.
    • A cell is the smallest unit of life.
    • The high power objective (HPO) in a microscope, usually marked 40x or 60x, is used to focus on a specific part of the specimen.
    • Oil magnification is the largest magnification ever.
    • A compound/light microscope uses compound lenses to magnify objects.
    • A dissection or stereoscope is used to get a better look at larger specimens, but individual cells cannot be seen because it has low magnification.
    • Buds form if the food is abundant in the area where the organism lives.
    • Robert Hooke was the first to describe cells and use the term cell to identify microscopic structures when he was describing a cork.
    • Biotic factors refer to all living things in an ecosystem such as plants and animals.
    • Parasitism is a relationship where the parasitic organism feeds off the other, while the host is harmed on interaction.
    • The cell is the basic structure and function of all organisms.
    • All organisms are composed of one or more cells.
    • Abiotic factors are non-living components of the environment that can have a significant impact on living organisms.
    • Symbiosis is a type of ecological relationship characterized by close interaction between organisms of different species for an extended time.
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