BSC 1005 UPDATED EXAMS TEST PAPER QUESTIONS
AND ANSWERS SURE A+
✔✔eukarya domain - ✔✔domain consisting of all organisms that have a nucleus;
includes protists, plants, fungi, and animals
✔✔scientific method - ✔✔a series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusion
✔✔steps of scientific method - ✔✔observation, hypothesis, experiment, conclusion
✔✔fact - ✔✔an observation that has been repeatedly confirmed
✔✔hypothesis - ✔✔a tentative statement about the natural world leading to deductions
that can be tested
✔✔law - ✔✔a descriptive generalization about how some aspect of the natural world
behaves under stated circumstances
✔✔theory - ✔✔a well-sustained explanation of some aspect of the natural world that
can incorporate facts, laws, inferences, and tested hypothesis
, ✔✔atomic structure - ✔✔atoms are made up of protons, neutrons, and electrons in an
organized fashion; the atomic mass of an element depends on the number of protons
and neutrons in the nucleus; the atomic number indicates the number of protons of an
element
✔✔arrangement of electrons in an atom - ✔✔electrons are arranged by their energy
levels, illustrated by shells in modeling atoms; the octet rule states than atom is stable if
it has 8 electrons in its valence shell
✔✔types of chemical bonds - ✔✔ionic, covalent, hydrogen
✔✔ionic bonds - ✔✔formed when one or more electrons are transferred from one atom
to another
✔✔covalent bonds - ✔✔bonds created by sharing electrons with other atoms
✔✔hydrogen bonds - ✔✔very weak bonds; occurs when a hydrogen atom in one
molecule is attracted to the electrostatic atom in another molecule
✔✔properties of water - ✔✔-water is solvent
-cohesion (ability of water molecules to cling to each other)
-adhesion (ability of water molecules to cling to other polar surfaces)
-high surface tension
-high heat capacity
-as a solid, it is less dense than as a liquid
✔✔acids - ✔✔compounds that form hydrogen ions when dissolved in water
✔✔bases - ✔✔compounds that reduce the concentration of hydrogen ions in a solution
✔✔pH scale - ✔✔measurement system used to indicate the concentration of hydrogen
ions (H+) in solution; ranges from 0 to 14
✔✔buffers - ✔✔important substances found in living organisms that help maintain a
certain range of pH
✔✔biomolecules - ✔✔organic molecules which combine to form living organisms;
includes carbohydrates, lipids, proteins and nucleic acids
✔✔type of elements - ✔✔metals, nonmetals, metalloids
✔✔monomer - ✔✔a simple compound whose molecules can join together to form
polymers
AND ANSWERS SURE A+
✔✔eukarya domain - ✔✔domain consisting of all organisms that have a nucleus;
includes protists, plants, fungi, and animals
✔✔scientific method - ✔✔a series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusion
✔✔steps of scientific method - ✔✔observation, hypothesis, experiment, conclusion
✔✔fact - ✔✔an observation that has been repeatedly confirmed
✔✔hypothesis - ✔✔a tentative statement about the natural world leading to deductions
that can be tested
✔✔law - ✔✔a descriptive generalization about how some aspect of the natural world
behaves under stated circumstances
✔✔theory - ✔✔a well-sustained explanation of some aspect of the natural world that
can incorporate facts, laws, inferences, and tested hypothesis
, ✔✔atomic structure - ✔✔atoms are made up of protons, neutrons, and electrons in an
organized fashion; the atomic mass of an element depends on the number of protons
and neutrons in the nucleus; the atomic number indicates the number of protons of an
element
✔✔arrangement of electrons in an atom - ✔✔electrons are arranged by their energy
levels, illustrated by shells in modeling atoms; the octet rule states than atom is stable if
it has 8 electrons in its valence shell
✔✔types of chemical bonds - ✔✔ionic, covalent, hydrogen
✔✔ionic bonds - ✔✔formed when one or more electrons are transferred from one atom
to another
✔✔covalent bonds - ✔✔bonds created by sharing electrons with other atoms
✔✔hydrogen bonds - ✔✔very weak bonds; occurs when a hydrogen atom in one
molecule is attracted to the electrostatic atom in another molecule
✔✔properties of water - ✔✔-water is solvent
-cohesion (ability of water molecules to cling to each other)
-adhesion (ability of water molecules to cling to other polar surfaces)
-high surface tension
-high heat capacity
-as a solid, it is less dense than as a liquid
✔✔acids - ✔✔compounds that form hydrogen ions when dissolved in water
✔✔bases - ✔✔compounds that reduce the concentration of hydrogen ions in a solution
✔✔pH scale - ✔✔measurement system used to indicate the concentration of hydrogen
ions (H+) in solution; ranges from 0 to 14
✔✔buffers - ✔✔important substances found in living organisms that help maintain a
certain range of pH
✔✔biomolecules - ✔✔organic molecules which combine to form living organisms;
includes carbohydrates, lipids, proteins and nucleic acids
✔✔type of elements - ✔✔metals, nonmetals, metalloids
✔✔monomer - ✔✔a simple compound whose molecules can join together to form
polymers
