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35 Cards in this Set
- Front
- Back
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what is scientific inquiry involve
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- finding the answers to a question
-investigations -sharing resaults |
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what makes a test fair
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the things that the scientists try and keep the same- constants, one thing that is changed is variable.
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what types of variables are involved in scientific expirments, expand
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the changes in expirments,
-time -temp -materials |
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model
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A model of a set of facts or concepts organised according to a formal set of rules.
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theory
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The most logical explanation of why things work the way they do. A theory is a former hypothesis that has been tested with repeated experiments and observations and found always to work.
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law
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A rule that describes, but doesn't explain, a pattern in nature and predicts what will happen under specific conditions
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list 3 safety procedures in a lab
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-know where your safety materials are
- tell the teacher first if anything goes wrong - do not touch anythign without a label, tell a teacher. |
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define cause and effect relationships
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Cause and effect is a form of analysis that examines the causes and consequences of events and ideas.
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what is a cell
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(biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
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list 3 points of cell theory
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The theory that all organisms are made of cells, and that all cells come from pre-existing cells. Cells are the structural and functional units of life.
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cell wall
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a wall that keeps out what the things it dosent want and in the things it does
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vacuole
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fluid filled space containing water, sugar,and proteins
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chlorplast
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organelle with chlorophyll used in photosynthisis
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mitochondria
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provides cells with energy
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golgi apparatus
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stores proteins untill te cell needs them
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ribisome
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builds proteins essintial for cell growth and reproduction
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nucleus
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the main frame of a cell, a vault
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nucleolus
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makes proteins
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endoplasmic reticlum
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canals that carry materials throughout the cell
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chromosome
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the DNA of a cell
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waht is the disadvantage of asexual reproduction
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genitic diversity
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asexual reproduction
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a type of reproduction where an organism replicates itself, by budding or dividing, without the involvement of other organisms.
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sexual reproduction
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The process where two cells (gametes) fuse to form one fertilized cell or zygote. cf asexual reproduction; gamete; hybrid.
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what are the 5 types of asexual reproduction
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-fragmentation
-spore formation -vegitiative reproduction -budding -binary fission |
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what are the 3 types of sexual reproduction
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-internal
-external -hermadofic |
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what are the 5 steps in cell reproduction
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-interphase
-prophase -metaphase -anaphase -telophase |
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chrosomes, and why they are important
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chrosomes are the dna in cells, and they are important becuase they create copies of them selves so that the new cell is the same, unless meiosis when it is only half of the chrosomes.
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chromatin
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Ribbon-like twists of DNA molecules in the nucleus of the interphase
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chromatid
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the two halfs of the dna from different places ( clone and original) joined together
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why is cell division important?
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it is important for our healing and growth and reproduction
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what stage do mitosis and meiosis differ?
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durring interphase
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haploid
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a single set of chromosomes (half of the full set of genetic material). In humans, the haploid number of chromosomes is 23.
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diploid
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Cells with the normal number of chromosomes (23 pairs = 46)
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somatic cell
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any cell in the body that is not a germ/sex cell (reproductive cell).
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centromete
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the straight liens where the chromatids meet
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