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Science Exam Q.2

Science Exam Semester 1

QuestionAnswer
Controlled Variable The Variables kept the same throughout the experiment.
Dependent Variable The variable that changes the resault of a change in the independent variable.
Independent Variable The one variable that is delibritely changed by the experimenter.
Compound light microscope Uses light to magnify, Magnifies up to 500x, 2D, object must be thin
Stereoscopic microscope Uses light to magnify, magnifies up to 50x, 3D, object can be thick
Transmission Electron Microscope Uses electrons to magnify, magnifies to 1,000,000x, 2D, object must be thin
Scanning Electron Microscope Uses electrons to magnify, magnifies up to 200,000, 3D, object must be thick
Objective lens Contains the lens for greater magnification. This is the lens that is next to the revolving nosepiece.
Stage Clips Holds the microscope slide in place. This is between the arm and stage.
Base Provides support for the microscope. This is the bottom part of the microscope.
Revolving Nosepiece Holds and turns the objective lens into viewing position. It is the tube next to the objective lens.
Fine Adjustment Sharpens the image under high magnification. This is next to the big knob.
Body Tube Connects the eyepiece to the revolving nosepiece. The tube connected to the eyepiece.
Stage Supports the microscope slide. This is the flat square shaped form in the middle of the microscope.
Light source Provides light that passes upward through the disk diaphram, the specimen, and the lenses. This is the circular object below the stage.
Arm Supports the body tube. The handle shapped object on the microscope. It connects the revolving nosepiece to the stage.
Disc Diaphram Lets you regulate the amount of light that hits the stage. This is by the stage.
Eyepiece Contains a 10x magnifying lenses you look through. Top part of microscope.
Course Adjustment Focuses the image under low power. (Bigger knob) This is the big knob next to the fine adgustment.
Endoplasmic Reticulum It is the path to help move things from the nucleus to the edge of the cell. It is like a highway.
Cell Wall Outside of the cell membrane. It's function is to protect and support the cell.
Ribosome It makes proteins. It is found in the ER or floating in the cytoplasm.
Nucleus It directs all of the activities of the cell. It is in the center of the cell and has chromosomes in it.
Vacuole Stores things in the cell. There like stacks of different stuff it's packaged into. They are made by the obi bodies.
Cytoskeleton Solid and hollow tubes that help the cell keep there shape. Change their shape or in some cases move.
Chloroplast It changes light energy into chemical energy in the form of sugar or starch. They are mostly green.
Lysosome It digustes waste and worn out cell parts. They are recyclers.
Gobi bodies It packages protiens and begains the process of moving them out.
Mitochondrion It breaks down "cell food" to release energy for use in cells.
Cells The smallest unit that functions independently.
Tissue A group of cells that work together to do the same job or function.
Organs A group of tissues that work together to do the same job or function.
Systems A group of organs that work together to do the same job or function.
Diffusion The movement of molecules from an area of high consentration of that type of molecule to an area of low consentration of that type of molecule. Without using energy until equilibrium is reached.
Osmosis Th diffusion of water across a selectivley permeable membrane.
Selectively Permeable Membrane It allows somethings to enter of leave a cell while keeping other things outside or inside the cell.
Equilibrium A state of when two opposing forces are equal.
Endocytosis The process of particles that are too large to move through the pores in the cell membrane ENTERING the cell using energy!
Exocytosis The process of particles that are too large to move through the pores in the cell membrane EXITING the cell using energy!
Photosynthesis Plants and some single celled creatures do it. It happens in the Chloroplasts or Chlorophyll. It turns light energy into into chemical energy (sugar or starch). It is cellular resiration backwards. CO2+H2O+Light energy> C6H12O6 + O2 carbon dioxide
Cells The smallest unit that functions independently.
Tissue A group of cells that work together to do the same job or function.
Organs A group of tissues that work together to do the same job or function.
Systems A group of organs that work together to do the same job or function.
Diffusion The movement of molecules from an area of high consentration of that type of molecule to an area of low consentration of that type of molecule. Without using energy until equilibrium is reached.
Osmosis Th diffusion of water across a selectivley permeable membrane.
Selectively Permeable Membrane It allows somethings to enter of leave a cell while keeping other things outside or inside the cell.
Equilibrium A state of when two opposing forces are equal.
Endocytosis The process of particles that are too large to move through the pores in the cell membrane ENTERING the cell using energy!
Exocytosis The process of particles that are too large to move through the pores in the cell membrane EXITING the cell using energy!
Photosynthesis Plants and some single celled creatures do it. It happens in the Chloroplasts or Chlorophyll. It turns light energy into into chemical energy (sugar or starch). It is cellular resiration backwards. CO2+H2O+Light energy> C6H12O6 + O2 carbon dioxide
Cellular Respiration All living things including plants every second of the day. It happens in the mitochondria Breaks down cell food (sugar or starch) Using oxygen to produce energy for the cell C6H12 O6+ O2> CO2+ H2O +energy sugar+oxygen> carbon dioxide + water
Fermentation Some animals, some fungi, some single celled creatures. Cytoplasm breaks down cell food (sugar or starch) WITHOUT using oxygen to produce energy for the cell. It produces 18x LESS energy than cellular respiration C6H12O6 (sugar) > Energy + alcohol
Fermentation (other formela) C6H12O6 (sugar) > Energy + lactic acid
Producer An organism that uses an outside source to create energy to create food. (plants)
Consumer An organism that can not produce food so they eat other organisms. (humans)
Decomposer An organism that decomposes organic material. (fungus)
1 differance Plant cells have both a cell membrane and a cell wall a animal cell only has a cell membrane.
2 differance Animal cells have a cytoplasm plant cells do not.
3 differnence Plant cells have chloroplasts animal cells do not.
4 difference Plant cells have a large centeral water vacuole animal cells have many small ones.
5 difference Plant cells are rectangular animal cells are rounded.
Created by: Ca.Conwill