which statement about the Density of Water is true?

Water is most dense as a liquid so as a solid, it floats

What bonds occur within and between water molecules?

covalent within and hydrogen between

what is specific heat?

heat required to raise temp of substance 1 degree

In which way is science a process?

The use of the Scientific Method

what is the difference between inductive and deductive reasoning?

inductive: specific to general deductive: general to specific

breaking of bond by the use of water

What is a covalent bond?

between two non-metals; share electrons

which are correct examples of cohesion and adhesion?

cohesion: water with water adhesion: water moves up tree root

What are the four important elements in biology?

Carbon, Oxygen, Hydrogen, Nitrogen

What is the difference between a scientific theory and a scientific hypothesis?

Hypothesis: educated guess; Theory: explanation (with evidence)

which statement is true about protons and neutrons?

protons make each element distinct; neutron count is different in isotopes

List the different levels of organization evident in living systems in order of increasing complexity.

molecule, tissue, population, ecosystem

In which situation would evolution through natural selection occur?

storm destroyed certain land forms

what makes a substance acidic or basic?

acidic if pH is 1x10(-1:-6); basic if pH is 1x10(-8:-14)

what is negative feedback?

stops or slows the production of hormones

what is the difference between hydrophilic and hydrophobic?

hydrophilic mixes with water and hydrophobic repels water

What are the three subatomic particles and their charges?

proton (+), electron (-), neutron (neutral)

Which is a correct explanation of a dehydration reaction?

forming a larger molecule through the loss of water

how do you identify the number of valence electrons of an element?

the group number (vertical rows)

Which is not a characteristic of the element carbon that allows it to form complex compounds?

the electronegativity is extremely low

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Questions 40

Answers

1
which statement about the Density of Water is true?
Water is most dense as a liquid so as a solid, it floats
water density increases as it reaches freezing point
water is most dense as a solid so ice sinks
water is least dense as a liquid, so as a solid it floats
2
What is the monomer of carbohydrates?
glucose
amino acids
Monosaccharides
fatty acids
3
What bonds occur within and between water molecules?
hydrogen within and van der waals between
ionic bonds within and covalent between
covalent within and hydrogen between
hydrogen within and covalent between
4
what elements exist in hydrocarbons
hydrogen and carboxyl
hydrogen and carbon
carbon and oxygen
hydrogen, oxygen and carbon
5
How does the trace element iodine affect a person?
decrease of Oxygen in the body
more productive immune system
Enlarged thyroid “goiter”
smaller thyroid
6
what is specific heat?
the heat energy from melting frozen water
the temp at which water will boil
heat required to raise temp of substance 1 degree
energy required to decrease temp one degree
7
identify the following functional group (in red)
hydroxyl group
amino group
carboxyl group
carbonyl group
8
In which way is science a process?
The Big Bang theory
The use of the Scientific Method
Going to Alyssa's SI :)
The life cycle of plants
9
what is the difference between inductive and deductive reasoning?
deductive: specific to general inductive: general to specific
inductive: only generalizations deductive: assumptions
inductive: specific to general deductive: general to specific
inductive: scientific theories deductive: laws
10
identify the pH if OH- concentration is 1x10-5
10
9
5
4
11
what is hydrolysis?
breaking of bond by the use of water
forming a bond by using water
adding a hydrogen to break a bond
breaking the bond of of two molcules by adding carbon
12
which is not one of the 4 macromolecules
Nucleic acids
Lipids
Proteins
Glucose
13
what is the monomer of nucleic acids
disaccharides
proteins
nucleotides
DNA and RNA
14
Identify the following functional group
amino group
phosphate group
carboxyl group
carbonyl group
15
what is the monomer of lipids
nucleotides
glycerol and fatty acid chains
hydrogenated oil
monosaccharides
16
identify the following functional group
amino group
sulfhydryl group
carbonyl group
phosphate group
17
What are the three Domains of Organisms?
Eukaryote, Fungi and Archaea
Protists, Fungi, and Archaea
Bacteria, Archaea and Protists
Archaea, Bacteria and Eukarya
18
identify the following functional group
amino group
Nitrogen group
carbonyl group
phosphate group
19
What is a covalent bond?
between two non-metals; share electrons
between metal and non-metal; gives away electron
between metal and non-metal; share electrons
between two ions; share electrons
20
which are correct examples of cohesion and adhesion?
cohesion: water with water adhesion: water with hydrogen
cohesion: water with hydrogen adhesion: water sticks to water
cohesion: water moves up tree root adhesion: water repels tree root
cohesion: water with water adhesion: water moves up tree root
21
What are the four important elements in biology?
Oxygen, Helium, Nitrogen, Phosphate
Carbon, Oxygen, Hydrogen, Nitrogen
Nitrogen, Sulfur, Boron, Carbon
Carbon, Hydrogen, Sulfur, Oxygen
22
What is the difference between a scientific theory and a scientific hypothesis?
Hypothesis: guess about nature; Theory: a law in nature
Hypothesis: assumptions about law; Theory: explanation (no evidence)
Hypothesis: explanation (with evidence) ; Theory: educated guess
Hypothesis: educated guess; Theory: explanation (with evidence)
23
identify the following functional group
sulfhydryl group
amino group
sulfur group
carbonyl group
24
which statement is true about protons and neutrons?
protons make each element distinct; neutron count is different in isotopes
neutrons make elements distinct; proton count is different in isotopes
electrons make elements distinct ;neutron co-unt is different in isotopes
electrons make each element distinct; proton count is different in isotopes
25
how many different amino acids are there?
23
20
30
36
26
which is not a category of carbohydrates?
polysaccharides
disaccharides
monosaccharides
trisaccharides
27
List the different levels of organization evident in living systems in order of increasing complexity.
organ, atom, ecosystem, organelle
molecule, tissue, population, ecosystem
biosphere, population, organ system, cell
ecosystem, atom, tissue, organelle
28
What is pH and its scale?
Measure of Hydrogens; 1-14
Measure of Hydroxides; 0-10
Measure of Hydrogens; 0-10
Measure of Hydroxides; 1-14
29
In which situation would evolution through natural selection occur?
an invasive species is killed
climate remains consistent for years
new food source is introduced
storm destroyed certain land forms
30
an ionic bond consists of what two types of elements?
metal and non-metal
two electronegative ions
non-metal and non-metal
all elements besides halogens
31
What element(s) MUST be present to be considered organic?
Carbon
Oxygen
Oxygen and Carbon
Carbon and Hydrogen
32
what makes a substance acidic or basic?
acidic if pH is 1x10(-1:-6); basic if pH is 1x10(-8:-14)
acidic if pH is 1x10(-8:-14); basic if pH is 1x10(-1:-6)
acidic if pH is 1x10(-7); basic if OH is 1x10(-7)
acidic if OH is 1x10(-1:-6); basic if OH is 1x10(-8:-14)
33
what is the monomer of proteins
enzymes
polysaccharides
amino acids
nucleic acids
34
what is negative feedback?
increases the amount of dangerous atoms
when someone gives you bad critiques
discourages the production of new cells
stops or slows the production of hormones
35
what is the difference between hydrophilic and hydrophobic?
hydrophilic mixes with water and hydrophobic absorbs water
hydrophilic repels water and hydrophobic mixes with water
hydrophilic repels water and hydrophobic turns into water
hydrophilic mixes with water and hydrophobic repels water
36
What are the three subatomic particles and their charges?
electron (-), proton (+), isotope (neutral)
atom (-), neutron (+), isotope (-)
neutron ( neutral), electron (+), proton (-)
proton (+), electron (-), neutron (neutral)
37
Which is a correct explanation of a dehydration reaction?
breaking down a polymer by losing water
breaking down a polymer by gaining water
forming a larger molecule through the loss of water
forming a larger molecule through the gain of water
38
how do you identify the number of valence electrons of an element?
the period number ( vertical rows)
the period number (horizontal rows)
the group number (vertical rows)
the group number (horizontal rows)
39
identify the following functional group
carbonyl group
hydroxyl group
sulfhydryl group
amino group
40
Which is not a characteristic of the element carbon that allows it to form complex compounds?
bonds can be single, double or triple
it contains 4 valance electrons
forms strong covalent bonds with other carbons
the electronegativity is extremely low

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