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Q 1/88
Score 0
Smallest unit of matter.
30
Atom
Q 2/88
Score 0
Positively charged subatomic particles. The atomic number reflects the number of these in an element.
30
Protons
88 questions
Q.
Smallest unit of matter.
1
30 sec
Q.
Positively charged subatomic particles. The atomic number reflects the number of these in an element.
2
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A small particle in the nucleus of the atom with no electrical charge
3
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Negatively charged subatomic particles in constant motion around the nucleus of an atom
4
30 sec
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Pure substance that consists entirely of one type of atom. And are represented by symbols.
5
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Atoms of the same element that have a different number of neutrons.
6
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Molecules that contain more than one element to form another substance
7
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When one or more electrons are transferred from one atom to another.
8
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Forms when electrons are shared between atoms.
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The smallest unit of most compounds, the structure that results when atoms are joined together by covalent bonds.
10
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Change in form of substance not the chemical makeup - size, shape, states of matter.
11
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A substance changes into a new substance that can't be changed back like rusting, digesting and rott
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Anything that has mass and volume
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The center of the atom which contains the protons and neutrons
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The force that holds two atoms together
15
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A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
16
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Energy can be transferred and transformed, but it cannot be created or destroyed.
17
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Molecule with an unequal distribution of charge, resulting in the molecule having a positive end and a negative end
18
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Material composed of two or more elements or compounds that are physically mixed together but not chemically combined so they can be separated again.
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A mixture in which substances are evenly distributed throughout
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A liquid substance capable of dissolving other substances
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A substance that is dissolved in a solution.
22
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Compounds that form hydrogen ions when dissolved in water
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Compounds that reduce the concentration of hydrogen ions in a solution.
24
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Measure of the concentration of hydrogen ions in a solution
25
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Carbon-based molecules
26
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Weak attraction between a hydrogen atom and another atom
27
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Number of protons and neutrons
28
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The number of protons in an atom which determines its place on the periodic table
29
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Same as the number of protons
30
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Determined by the atomic number of protons subtracted from the atomic mass.
31
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Molecule with partial charges, +/- ends. Mixes with water. Unequal sharing of electrons
32
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No partial charges. Does not mix with water. Equal sharing of electrons.
33
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Attraction between like molecules. Water is attracted to water
34
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Attraction between molecules of different substances.
35
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Weak attraction between a hydrogen atom and another atom.
36
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A type of strong chemical bond in which two atoms share one or more pairs of valence electrons.
37
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The substance that dissolves solutes. WATER usually.
38
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Substance being dissolved.
39
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A measure of how difficult it is to stretch or break the surface of a liquid.
40
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A process powered by adhesion that causes water molecules to move upward against gravity through a narrow tube such as the stem of a plant.
41
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Water can dissolve more substances than any other liquid.
42
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Measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges from 0 to 14. One is most acidic and 14 is most basic
43
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A substance that increases the hydrogen ion (H+) concentration of a solution. Below seven is considered acidic.
44
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Any compound that increases the number of hydroxide ions when dissolved in water (OH-). Anything higher than seven is considered basic. Also known as alkalinity.
45
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pH of 7 equal amounts of H+ and OH- ions.
46
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A solution that resists changes in pH when limited amounts of acid or base are added.
47
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A combination of two or more substances that are not chemically combined and can be separated again.
48
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A homogeneous mixture of two or more substances, a solute dissolved in a solvent becomes this.
49
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Water's ability to absorb and retain heat
50
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The change of state from a liquid to a gas
51
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The change of state from a gas to a liquid
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The temperature at which a liquid changes into a solid
53
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A reaction that ABSORBS energy in the form of heat
54
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A reaction that RELEASES energy in the form of heat
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Elements or compounds that enter into a chemical reaction
56
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The substances made in a chemical reaction; found on the right of the arrow
57
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Determines activity and ability of the substrate to fit into an enzyme
58
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Factors that can affect an enzyme's activity
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Anything that speeds up a reaction and reduces activation energy
60
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The energy needed to start a reaction
61
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A protein polymer that speeds up biochemical reactions
62
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The molecule that binds to the enzyme's active site
63
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Most enzymes have a specific substrate that fits into its active site
64
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A measure of how acidic or basic a substance is; measure of hydrogen ions
65
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Describes the values at which an enzymes functions the best (fastest/produces the most product)
66
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0-6 on the pH scale
67
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8-14 on the pH scale
68
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The sum of all the chemical reactions that happens inside a living organism
69
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The location where a substrate bonds to enzyme
70
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Prefix that means 'inside'
71
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The prefix means outside or outer
72
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Suffix referring to temperature or heat
73
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A substance that slows down or stops a chemical reaction
74
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A protein that binds to an enzyme and stimulates activity.
75
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A spontaneous chemical reaction in which there is a net release of free energy.
76
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A non-spontaneous chemical reaction in which free energy is absorbed from the surroundings.
77
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Single chemical unit that makes up a polymer
78
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Molecules composed of many monomers; makes up macromolecules
79
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Compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body in the form of sugars and starches.
80
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Macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
81
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An organic compound that is made of one or more chains of amino acids found in meat and nuts
82
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Macromolecules that carry hereditary information, DNA and RNA
83
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A monosaccharide (simple sugar) that is an important source of energy.
84
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A simple organic compound containing CHO and an amino (—NH2) group; monomers of proteins.
85
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The monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
86
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Simple sugars such as glucose, fructose and galactose; the monomers of carbohydrates
87
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A chemical reaction in which two molecules are bonded together with the removal of a water molecule.