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BIO 181 UNIT 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS
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BIO 181 UNIT 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS
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BIO 181 UNIT 1 EXAM QUESTIONS WITHCOMPLETE SOLUTIONS
Hypothesis5-5ans--✔✔a5possible5explanation5for5an5observation
A5hypothesis..5-5ans--✔✔-must5be5tested5to5determine5its5validity
-is5often5tested5in5many5different5ways
-allows5for5predictions5to5be5made
Experiment5-5ans--✔✔tests5the5hypothesis
An5experiment...5-5ans--✔✔-
must5be5carefully5designed5to5test5only5one5variable5at5a5time
-involves5an5independent5and5a5dependent5variable
-consists5of5a5test5experiment5and5a5control5experiment
If5the5hypothesis5is5valid...5-5ans--
✔✔you5should5be5able5to5predict5the5results5of5the5experiment
Scientific5inquiry5-5ans--✔✔Observation
Question
Hypothesis
Experiments
Conclusion
Theory/Law
Matter5-5ans--✔✔anything5that5occupies5space5and5has5mass
What5is5matter5composed5of?5-5ans--
✔✔atoms5that5are5composed5of5protons,5neutrons5and5electrons
Where5are5protons5found?5-5ans--✔✔Nucleus
Where5are5neutrons5found?5-5ans--✔✔Nucleus
, Where5are5electrons5found?5-5ans--✔✔In5orbitals5around5the5nucleus
Chemical5element5-5ans--
✔✔substance5that5cannot5be5broken5down5to5other5substances5by5ordinary5chemical5me
ans
How5many5elements5are5there?5-5ans--✔✔92
How5many5elements5are5important5to5life?5-5ans--✔✔25
What5elements5make5up596%5of5air5on5Earth?5-5ans--
✔✔Caron,5Hydrogen,5Oxygen5and5Nitrogen
Compound5-5ans--
✔✔any5pure5substance5which5contains5atoms5of525or5more5different5elements
Ex5of5compound5-5ans--✔✔Sodium5chloride
Compounds5are5held5together5by...5-5ans--✔✔Ionic5or5covalent5bonds
Ionic5bonds5-5ans--
✔✔The5loss5or5gain5of5electrons5will5make5ions5which5are5attracted5to5each5other5if5oppo
sitely5charged
Ionic5bonds5have...5-5ans--✔✔unfilled5shells
Are5ionic5bond5weak5or5strong?5-5ans--✔✔Weak
Covalent5bonds5-5ans--
✔✔atoms5incompletely5filled5valence5electron5shells5share5electrons5between5them
Are5covalent5bonds5weak5or5strong?5-5ans--✔✔Strong
Ionic/covalent5bonds5are...5-5ans--✔✔chemical5bonds
Isotopes5-5ans--
✔✔atoms5of5the5same5element5that5have5different5atomic5mass5#s5due5to5different5#s5of5
neutrons
Valence5electrons5-5ans--✔✔electron(s)5in5the5outermost5shell
What5are5VE5responsible5for?5-5ans--✔✔chemical5properties5of5the5atom
What5determines5the5mass5of5an5element?5-5ans--✔✔Protons5and5neutrons
Periodic5table5-5ans--✔✔arranges5all5elements5according5to5atomic5#s
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