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33 Cards in this Set
- Front
- Back
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Characteristics of Living Things
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reproduction, growth and development, homeostasis, organization
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increase in the amount of living material in an organism
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growth
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series of changes an organism, undergoes in reaching its final, adult form.
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development
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steady state of the internal operation of an organism regardless of external changes
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homeostasis
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all variables are the same except the 1 being tested
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conrolled experiment
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the group in which all the variables remain constant, including the independent variable
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control group
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the group in which the independent variable change
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experimental group
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variable being tested
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independent variable
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any change that results from the manipulation of the independent variable
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dependent variable
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statement formed by analyzing observations and sorting through possible causes of the effect noted
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hypothesis
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scientific test of a hypothesis used to determine whether or not the hypothesis is correct
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experiment
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microscope used to view small structures
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transmission electron microscope (TEM)
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electron microscope that permits a view of surfaces not possible with the TEM
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scanning electron microscope
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positively charged
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Protons
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no charge
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Neutrons
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Electrons
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negative charged
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-the region or space that electrons occupy while moving around the nucleus
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Electron cloud
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-substance composed of 1 type of atom
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Elements
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- join the combinations of atoms
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Covalent bonds
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- a combination of 2 or more atoms joined by a covalent bond
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Molecule
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charged atoms
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ions
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force of attraction between 2 ions
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ionic bond
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mixtures that are the same throughout but have variable compositions, depending on how much of one substsance is dissolved in the other
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solutions
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molecules that have oppositely charged regions
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polar molecules
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solution have greater concentration of hydrogen ions then hydroxide ions
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acid
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greater concentration of hydroxide ions than hydrogen ions
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base
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organic molecules having the same chemical formula but different structural formula
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isomers
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organic compounds composed of carbon, hydrogen, and oxygen with a ratio of 2 hydrogen atoms to each oxygen atom
ex: starches, glucose |
carbohydrate
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monosaccaride
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glucose, fructose (fruit), galactose (milk)
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sucrose, lactose, and maltose
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disaccarides-isomers
C12 H22 O11 |
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polysaccarides
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starch, cellulose, glycogen
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composed of carbon, hydrogen, and oyygen, but the no. of hydrogen atoms per molecule is much greater than the no. of oxygen atoms
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lipids
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ex of lipids
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cholesterol, fat molecules
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