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Quiz 1
Quiz 1
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1
What is cohesion?
the opposite of adhesion
helps transport the water against gravity in plants
2
What is a compound?
A substance consisting of two or more elements in a fixed ratio
A covalent bond that consists of hydrogen and another element
3
How are atomic numbers classified?
In File Z: Top Secret
The number of Toms in the room
How awesome they are
The number of protons in the nucleus
4
Where are valence electrons located?
Located in the innermost shell
Located in the outermost shell
5
Polar bonds share electrons _______.
Equally
Unequally
6
What is adhesion?
hydrogen bonding
The attraction between different substances
7
Anions are negatively charged ions
False
True
8
What are isotopes
Two atoms with different number of neutrons
Two atoms with different number of electrons
Two different types of atoms
Two atoms with different number of protons
9
Cell Theory is the study of plant cells inside fungi
True
False
10
What does hydrophilic mean?
water hating
water loving
water tolerant
water
11
Neutrons and Protons for the atomic nucleus
True
False
12
What is an atom?
The smallest unit of matter
A type of energy
The basic unit of energy
A type of matter
13
What is the van der Waals force?
The force that contributes to bonding between molecules
The force that lets snakes move
There is no such force
The force that lets bats see
14
The 4 elements that makeup 96% of living matter is:
Hydrogen, Phosphorus, Carbon Dioxide, Nitrogen
Carbon, Hydrogen, Oxygen, Nitrogen
15
All organisms are composed of matter
False
True
16
What are the remaining 4% that make up living matter?
Hydrogen, Water, Carbon, Atoms
Calcium, Phosphorus, Potassium, and Sulfur
17
What is the structure of ATP?
Adenosine + Ribose + 3 Phosphorous atoms
Phosphorous and Carbon
Adenine and Guanine
2 Ribose + 5 Phosphorous atoms + 2 Oxygen atoms
18
What is a polar covalent bond?
repels water
Will spend more time neat the hydrogen rather than the hydrogen
19
What are the steps in the scientific method?
Develop a question or idea
Make an observation, Conduct an experiment
Compose a hypothesis
all the above, b***hes
20
What is the Scientific Method?
Study of the natural world through observations
Study of the scientific experiment
21
What are isomers?
compounds with the same bonds
compounds with the same structural formula
compounds with the same name
compounds with the same molecular formula, different shapes
22
What is ATP?
A chemical form of energy
A imaginary form of energy
A magical form of energy
A historical form of energy
23
What's a nonpolar covalent bond?
A technique for showing the valence electrons of an atom
How all bonds are formed
Bonding electrons are equally attracted to both atoms
Bonding electrons are not equally attracted to both atoms
24
Structural Isomers
the same thing as the structural formula
Another name for the wood to build a house
made of iron and zinc
Comp. that have identical molecular formulas but differ in bonding sequ.
25
Science means "to know"
False
True
26
What is electronegativity?
NOT CORRECT
Atoms attraction for the electrons in covalent bonds
27
What is a scientific theory?
Experiment guided by inductive reasoning
Supported by a large body of evidence
28
What is a buffer?
A compound that doesn't change the PH of a solution
A compound that neutralizes the PH of a solution
A compound that raises the PH of a solution
A compound that lowers the PH of a solution
29
What is 8 + 8?
12
0
9
16
30
enantiomers show
same shape
mirror images of each other
geometric isomers
flipped images of eachother
31
What are ionic bonds?
Bonds between two positively charged molecules
The attraction between cations and anions
32
What is organic chemistry?
The study of organic compounds that contain carbon
The study of organic compounds that contain oxygen
33
What is Radiometric Dating?
technique to date materials and the decay rates of isotopes
How particles and molecules of water break down
Comparing the atoms of materials and how they react
Comparing ancient rocks to current rocks
34
What is surface tension?
no
When molecules create a layer of thin thin ground
When cohesion creates a film on the surface of the water
When the surface becomes awkward
35
What are biogenesis?
All life comes from pre-existing life
A deeper study of biology
36
What is Radioactive Decay ( half-life)?
When a leave falls of a tree and it releases a gas
The breaking down a parent isotope into a daughter isotope
The breaking down of a daughter isotope into a daughter isotope.
when a electron turns red.
37
What are covalent bonds?
The sharing of valence electrons
Bonds that consist of hydrogen and carbon
38
What does hydrophobic mean?
water
water hating
water loving
water tolerant
39
What is an element?
A chemical reaction that CAN be broken down by reactions
A chemical reaction that CANNOT be broken down by reactions
40
What are the 3 types of hydrocarbons?
Lipids, Proteins, and Nucleic Acids
Methane, Ethene, Nitrogen
Alkanes, Alkenes, and Alkynes
Ionic, Covalent, and Organic
41
Lipids are nonpolar. What does this mean?
They dissolve in water
They don't have a cell membrane
They don't dissolve in water
They make good salad dressing
42
What is the correct form of Methane?
CH2
Carbon dioxide
Meth
CH4
43
What is a solution?
to clean your contacts
A substance that is completely homogenous
44
Neutrons are measured in:
Daltons
Half-lifes
45
Cations are positively charged ions
False
True
46
A hypothesis is a testable explanation for a set of observations
True
False
