BIO 107 EXAM 1 QUESTIONS AND
ANSWERS
List the scientific methods in order - Correct Answers -1) observation 2) question 3)
hypothesis 4) prediction 5) experiment 6) results 7) analysis 8) conclusion
What are the characteristics of life? - Correct Answers -1) organization/order 2)
response to stimuli 3) reproduction 4) adaption 5) growth/development 6)
regulation/homeostasis 7) energy processing
What is a controlled experiment? - Correct Answers -- compares a control group and
experimental group
- all variables are the same except the independent (tested variable)
- dependent variable is the outcome
The smallest unit of life - Correct Answers -cell
the smallest fundamental unit of structure in living organisms - Correct Answers -cell
part of the experiment that does not change - Correct Answers -control
recorded observations; can be qualitative or quantitative - Correct Answers -data
the variable used to judge the outcome - Correct Answers -dependent variable
the process of gradual change in which new species arise from old species - Correct
Answers -evolution
a suggested explanation for an event (which can be tested) - Correct Answers -
hypothesis
the factor that is manipulated in an experiment - Correct Answers -independent variable
the greater relative survival and reproduction of individuals in a population that have
favorable heritable traits, leading to evolutionary change - Correct Answers -natural
selection
a method of research with defined steps that include experiments and scientific
observation - Correct Answers -scientific method
, What is adhesion? - Correct Answers -when a liquid sticks to something else through
hydrogen bonding; the constant breaking and reforming of hydrogen bonds makes
water "sticky" from it's slight charges
Why is ice less dense than water? - Correct Answers -when ice freezes its hydrogen
bonds become stable instead of them constantly moving, causing them to expand and
trap air inside
Why is water so diverse as a solvent? - Correct Answers -since hydrobonds are always
breaking and reforming, water is always moving; it bonds to the atoms of other
molecules and pulls them apart
How does water dissolve salt such as NaCl (table salt)? - Correct Answers -the slight
positive charge from water, as it is breaking and re-bonding, bonds to the slight negative
charge in the salt (Cl) and pulls the atoms apart. Oxygen (-) may also bond to Na (+) as
the bond break and rebuild
steps of the scientific method - Correct Answers -1) observation 2) question 3)
hypothesis 4) prediction 5) experiment 6) analysis 7) conclusion
a thoroughly tested and confirmed explanation for a set of observations or phenomena -
Correct Answers -theory
smallest unit of matter that still retains the properties of an element - Correct Answers -
atom
"building blocks" made up of subatomic particles - Correct Answers -atom
a substance that cannot be chemically broken down into other substances - Correct
Answers -element
the TYPE of atom depending on what subatomic particles it is made of; contain different
numbers of electrons, neutrons, and protons - Correct Answers -element
compounds with elements in definite, fixed ratios - Correct Answers -molecule
the atoms are held together by one of three bonds - Correct Answers -molecules
positively charged subatomic particle - Correct Answers -proton
negatively charged subatomic particle - Correct Answers -electron
subatomic particle with no charge - Correct Answers -neutron
How many elements are essential for human life? - Correct Answers -about 25
ANSWERS
List the scientific methods in order - Correct Answers -1) observation 2) question 3)
hypothesis 4) prediction 5) experiment 6) results 7) analysis 8) conclusion
What are the characteristics of life? - Correct Answers -1) organization/order 2)
response to stimuli 3) reproduction 4) adaption 5) growth/development 6)
regulation/homeostasis 7) energy processing
What is a controlled experiment? - Correct Answers -- compares a control group and
experimental group
- all variables are the same except the independent (tested variable)
- dependent variable is the outcome
The smallest unit of life - Correct Answers -cell
the smallest fundamental unit of structure in living organisms - Correct Answers -cell
part of the experiment that does not change - Correct Answers -control
recorded observations; can be qualitative or quantitative - Correct Answers -data
the variable used to judge the outcome - Correct Answers -dependent variable
the process of gradual change in which new species arise from old species - Correct
Answers -evolution
a suggested explanation for an event (which can be tested) - Correct Answers -
hypothesis
the factor that is manipulated in an experiment - Correct Answers -independent variable
the greater relative survival and reproduction of individuals in a population that have
favorable heritable traits, leading to evolutionary change - Correct Answers -natural
selection
a method of research with defined steps that include experiments and scientific
observation - Correct Answers -scientific method
, What is adhesion? - Correct Answers -when a liquid sticks to something else through
hydrogen bonding; the constant breaking and reforming of hydrogen bonds makes
water "sticky" from it's slight charges
Why is ice less dense than water? - Correct Answers -when ice freezes its hydrogen
bonds become stable instead of them constantly moving, causing them to expand and
trap air inside
Why is water so diverse as a solvent? - Correct Answers -since hydrobonds are always
breaking and reforming, water is always moving; it bonds to the atoms of other
molecules and pulls them apart
How does water dissolve salt such as NaCl (table salt)? - Correct Answers -the slight
positive charge from water, as it is breaking and re-bonding, bonds to the slight negative
charge in the salt (Cl) and pulls the atoms apart. Oxygen (-) may also bond to Na (+) as
the bond break and rebuild
steps of the scientific method - Correct Answers -1) observation 2) question 3)
hypothesis 4) prediction 5) experiment 6) analysis 7) conclusion
a thoroughly tested and confirmed explanation for a set of observations or phenomena -
Correct Answers -theory
smallest unit of matter that still retains the properties of an element - Correct Answers -
atom
"building blocks" made up of subatomic particles - Correct Answers -atom
a substance that cannot be chemically broken down into other substances - Correct
Answers -element
the TYPE of atom depending on what subatomic particles it is made of; contain different
numbers of electrons, neutrons, and protons - Correct Answers -element
compounds with elements in definite, fixed ratios - Correct Answers -molecule
the atoms are held together by one of three bonds - Correct Answers -molecules
positively charged subatomic particle - Correct Answers -proton
negatively charged subatomic particle - Correct Answers -electron
subatomic particle with no charge - Correct Answers -neutron
How many elements are essential for human life? - Correct Answers -about 25
