Biology Mid-term
Terms
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- Qualitative and Quantitative Data
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Qualitative: data that you your your five senses
Quantitative: data that has numbers(data chart) - Independent and Dependent Variable
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Independent: the variable that affects the outcome of the experiment
Dependent: the variable that results from changes in the independent - Control and Constant and Experimental Group
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Control: the standard against which results are compared
Constant: things that stay the same
Experimental Group: group thats gets tested on - Hypothesis
- the explanation for a question or a problem that can be formally tested
- Theory
- the explanation of a natural phenomenon supported by a large body of scientific evidence obtained from many different investigations and observations
- Cell Theory
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1- all organisms are composed of one or more cells
2- the cell is the basic unit of structure and organizations of organisms
3- all cells come from preexisting cells - Anton van Leeuwenhook
- used a microscope to view water from a pond, and he discovered many living creatures
- Robert Hooke
- used a microscope to observe a thin slice of cork in 1665, he saw "a lot of little boxes", he called them cells
- Mattias Schleiden
- german botanist, concluded that cells make up not only the stems and roots but every part of the plant
- Theodor Schwann
- german zoologist, claimed that animals are also made of cells
- Rudolph Virchow
- german physician, determined that cells come only from other cells
- Schleidan, Schwann, and Virchow
- helped from the cell theory with observations
- Covalent, Ionic, and Hydrogen Bonding
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Covalent: a bond when two or more atoms share electrons to form a molecule
ionic: a bond when molecules gain or lose electrons
hydrogen: bond in a water molecule when molecules are shared by oxygen and hydrogen