SCI 1020 Exam 2 with Verified Solutions
science is - ANSWER-a body of knowledge, the discovery of something new and
unknown (biology, the study of living organisms)
definition of life - ANSWER--common set of biological molecules
-composed of cells
-growth
-movement
-reproduction
-response to external environmental stimuli
-metabolism
-maintain homeostasis
elements - ANSWER-fundamental forms of matter
atoms - ANSWER-the smallest units of an element
atomic nucleus - ANSWER-proton (+) and neutron (-)
electron cloud (energy levels) hold - ANSWER-electrons (negative charge)
atomic number - ANSWER-the number of carbons in the nucleus/number of protons
ions - ANSWER-atoms with an electrical charge.
(+) charge = more protons than electrons = (+) charge called (cat ion)
more electrons = (-) charge, called (an ion)
molecule - ANSWER-two or more atoms held together by chemical bonds
water is a _____ molecule - ANSWER-polar molecule
hydrogen bond - ANSWER-weak attraction between molecules (weakest but most
important bond)
solution - ANSWER-a chemical mixture based on 100
solute and solvant - ANSWER-substance that dissolves in solvent, substance that
dissolves solute (50% each)
hydrophobic - ANSWER-water-fearing (lipids and carbons)
science is - ANSWER-a body of knowledge, the discovery of something new and
unknown (biology, the study of living organisms)
definition of life - ANSWER--common set of biological molecules
-composed of cells
-growth
-movement
-reproduction
-response to external environmental stimuli
-metabolism
-maintain homeostasis
elements - ANSWER-fundamental forms of matter
atoms - ANSWER-the smallest units of an element
atomic nucleus - ANSWER-proton (+) and neutron (-)
electron cloud (energy levels) hold - ANSWER-electrons (negative charge)
atomic number - ANSWER-the number of carbons in the nucleus/number of protons
ions - ANSWER-atoms with an electrical charge.
(+) charge = more protons than electrons = (+) charge called (cat ion)
more electrons = (-) charge, called (an ion)
molecule - ANSWER-two or more atoms held together by chemical bonds
water is a _____ molecule - ANSWER-polar molecule
hydrogen bond - ANSWER-weak attraction between molecules (weakest but most
important bond)
solution - ANSWER-a chemical mixture based on 100
solute and solvant - ANSWER-substance that dissolves in solvent, substance that
dissolves solute (50% each)
hydrophobic - ANSWER-water-fearing (lipids and carbons)
