1. ABSORPTION
Another word for endothermic. When energy from light (or
heat) is taken in by an object.
2. ACCURATE
When you hit the bullseye of a target or get the right answer
on an experiment. You can be ___ without being precise.
3. ACID
__ is a substance that tastes sour, reacts with metals and
carbonates, and turns blue litmus paper red. 0-6
4. ACTIVATION
The __ energy is the minimum amount of energy needed to
start a chemical reaction.
5. AMORPHOUS
Solids where the articles are not arranged in a regular
pattern.
6. ATOMIC MASS
The ______ for our purposes this is the weight of one atom
of a particular type.
7. ATOMIC NUMBER
On the periodic table, this is the large number for an
element that tells you the number of protons for that specific
atom.
Everything is made of ________ and they are the smallest
8. ATOMS
9. BASE
building block of all substance. With compounds, two or
more different __ are chemically combined in a set ratio and
if you break or separate them apart, you no longer have a
compound.
__ is a substance that tastes bitter, feels slippery and turns
red litmus paper blue. 8-14. B - blue, base.
10. BOILING POINT
The temperature at which a liquid boils and changes from a
liquid to a gas.
11. BOYLE'S LAW
When the pressure of a gas is increased and temperature
remains the same, the volume decreases and when the
pressure is decreased the volume increases.
12. CATALYST
A __ is a material that increases the rate of reaction by
lowing the activation energy needed.
13. CHEMICAL
These involve a change in color, change in temperature,
production of an odor or gas, and always making a new
substance - rusting, cooking, tarnishing, rotting - are all
examples of __ change.
14. CHEMICAL BOND
When atoms combine, they form a ________ which is a
force of attraction between two atoms.
15. CHEMICAL CHANGE
After a ___ there is a new product and the original products
can only be created with another ___. ___ usually
produces a change in temperature, color, or a gas.
16. CHEMICAL ENERGY
Your body breaks the bonds of atoms in food to provide
___ to carry out life's tasks. ____ is the energy stored
stored in chemical bonds.
17. CHEMICAL FORMULA
A compound may be represented by a _______ which
shows the elements in the compound and the ratio of
atoms. H20 means 2 hydrogen and 1 oxygen atoms
combined in a 2 to 1 ratio.
18. CHEMICAL REACTION
A ___ is a process in which substances change into new
substances with different properties.
19. CHEMICAL SYMBOL
the abbreviation for a chemical's name, written as a capital
letter or a capital and a lower case letter. H -hydrogen,
c-carbon, Na -sodium
20. CHEMISTRY
The study of the properties of matter and how matter
changes.
21. COLLOID
A ___ is like a solution but it contains larger particles. The
particles are too small to be seen but large enough to
scatter light. Milk, mayonnaise, shaving cream, whipped
cream.
22. COMBINE
When acids and bases combine, they always form water
and salt.
23. COMBUSTIBILITY
The ability to react between oxygen and fuel that results in
a fire.
24. COMPOUND
A _______ is a pure substance made of two or more
elements chemically combined in a set ration like H20.
25. CONCENTRATED
A ___ solution, is one that has a lot of solute dissolved in
the solvent. If water evaporates from my orange juice, the
orange juice becomes more ____.
26. CONDENSATION
a gas cooling and changing into a liquid. Energy is lost.
27. CONDUCTOR
A ___ is a material through which an electric charge or
heat can flow easily.
28. CONSERVATION OF MATTER
If 2 grams of hydrogen react with 16 grams of oxygen, we
get 18 grams of a new substance because of . Matter is
neither created nor destroyed just transformed.
29. CRYSTALLINE
Solids like salt, snow, sugar are examples of ________
solids which are arranged in a patter of pattern, made out
of crystals.
30. DEFORMATION
In engineering mechanics, ______ is a change in shape
due to an applied force. If I step on a coke can there is
____ if I step on a sponge, it is elastic and returns to its
original shape.
31. DENSITY
_________ is mass divided by volume. It is measured in
cm3 or mL. ___ relates the mass of a material in a given
volume.
32. DEPENDENT
A ____ variable is the variable measured during an
experiment when the other variable is changed.
33. DEPOSITION
Changing from a gas directly to a solid without any liquid
state.
34. DILUTE
In salt water, for example, if I add more fresh water, I ___
the amount of salt water in the liquid.
35. DUCTILE
A term used to describe material that can be pulled out into
a long wire.
36. ELECTRON
An extremely tiny particles that orbit around the nucleus of
an atom in a path called a shell. When electrons jump from
a higher to a lower energy level, the produce light and
when they go from a lower to a higher energy level they
absorb light because they take in the energy.
37. ELEMENT
An ___ is one of about 100 pure substances that make up
the periodic table.
38. ENDOTHERMIC CHANGE
The melting of ice is an ____. A change in which energy is
taken in.
39. ENERGY
____ is a property of many substances and is associated
with heat, light, electricity, mechanical motion, sound,
nuclei, and the nature of a chemical. __ is transferred in
many ways.
40. ENZYMES
A catalyst in the stomach that aids the chemical reaction of
digestion.
41. ERROR
When your shots at a target are spread out everywhere or
your experiment results are all over the place, you have
random ____.
42. EXOTHERMIC CHANGE
________ releases energy, like an explosion or freezing of
water.
43. FLUID
A liquid is a substance that flows. It has a definite volume
and TAKES THE SHAPE OF ITS CONTAINER.
44. HETEROGENEOUS MIXTURE
In a _____ you can see the different substances. blood,
salad, sand and water.
45. HOMOGENEOUS MIXTURE
The substances in a _____, the substances are so evenly
mixed that you can't see the different parts. salt water.
46. INDEPENDENT
The ___ variable is the variable that is changed during an
experiment. It is not the one measured.
47. INERT GAS
Noble gases. The name given to the elements at the far
right hand column of the Periodic table. It is another name
for the Noble gases.
48. INHIBITORS
A material used to decrease the rate (how fast) a reaction
takes place. Putting water on a fire inhibits it.
49. INTERNATIONAL SYSTEM UNITS
To measure the properties of matter, scientist use a system
called the ____ or SI.
50. ISOTOPES
Atoms always have the same number of protons, but
sometimes gain or lose neutrons and these are called
__________.
51. KINETIC ENERGY
______ is the energy of matter in motion. ___ energy
increases as an objects mass or speed increases - ie goes
faster or gets heavier.
52. MALLEABLE
The ability of a metal to be hammered or rolled into a
sheet.
The variable that the scientist changes during an
53. MANIPULATED(INDEPENDENT)
experiment. Varying the amount of water you give a type of
plant.
54. MASS
If I go to the moon with my science book, the ___ or
number of atoms stays the same but the weight is less. ___
is the amount of stuff in matter.
55. MATTER
Anything that has mass and takes up volume or space.
This does not include light and sound.
56. MELTING POINT
Same temperature as freezing point. The temperature at
which a solid changes into a liquid and energy is gained.
57. METALLOID
Fuses and semiconductors. The non-metal part of the
periodic table that has some properties of metals and some
properties of nonmetals.
58. METALS
The part of the periodic table on the left and most of the
periodic table. Good conductors of electricity and heat.
They have a shiny luster. Malleable - can be hammered
and shaped
59. MIXTURE
A mixture is different stuff (atoms, molecules) placed in the
same container but not combined chemically. Each
substance keeps its unique properties and are not
combined in a set ration.
60. MOLECULES
A heated substance may appear to expand but that is not
true. What is happening is that the expanding is really the
___ moving faster and farther apart as they gain energy
from the increasing temperature. A _______ is two or more
different type atoms chemically combined to make a
compound.
The neutral part of an atom located in the center.
61. NEUTRON
62. NONMETALS
The upper right part of the periodic table. Poor conductors
of heat or electricity. Most brittle and can't be shaped.
63. NUCLEAR FUSION
__ occurs in starts on a huge scale. smaller nuclei combine
into larger nuclei creating heavier elements. Since they
come from stars, they are only found on the earth's
surface.
The center part of an atom.
64. NUCLEUS
65. PARTICLE ACCELERATORS
Man made elements are made machines that move
particles at very high speeds and collide them into each
other.
66. PERIODIC TABLE
Organizes elements based on the number of protons of a
particular element. Carbon has 6 protons, oxygen has 8
protons.
67. PHYSICAL CHANGE
A ____ is any change that alters the form of appearance of
matter but does not make any substance in the matter into
a different substance. It is still the same substance.
68. PHYSICS
The study of matter and energy and how they interact.
69. PLASMA
Think of lightning on earth or our sun. It is most of the
universe. A gas like state of matter created when atoms
lose some electrons because the temperature is so high
that the electrons get enough energy to escape. The 4th
state of matter.
70. POTENTIAL ENERGY
___ is the energy an object has because of its position.
71. PRECISION
You can have ___ without being accurate. Several shots
that hit the exact same part of a target is said to be ___ or
in an experiment when all the results are the same.
72. PRESSURE
The ___ depends on force/area. A snow shoe has a large
area and less ______. High heel shoes have a smaller
surface area and underneath the shoe is more __.
73. PRODUCT
The new substances produced by a chemical reaction.
74. PROTON
The positive part of an atom located in the center.
75. QUALITATIVE
A __ observation deals with characteristics of an object that
aren't numbers - examples - solid, red, sticky.
76. QUANTITATIVE
A ___ observation deals with numbers or the amount of an
object. Three pigs, 7 pounds etc.
77. RANDOM
A systematic error is a predictable error caused by a
predictable mistake like a 12 inch ruler not printed
correctly. Everyone who uses the ruler will make the same
error in calculating distance. A __ error is an unpredictable
error made because all human beings make mistakes.
78. REACTANTS
The substances that you have at the beginning of a
chemical reaction.
79. REACTIVITY
The ease and speed at which an element combines or
reacts with other elements and compounds is called ___
80. RESPONDING(DEPENDENT)
The variable that is expected to change in response to
another variable being changed by the scientist. If the
scientist changes the amount of water given a plant, you
would expect the size of the plant to respond and change.
81. SATURATED
When a solution can't hold any more solute, It is said to be
saturated. Think of a paper towel that can't hold more
water. Think of water standing on top of the ground
because the ground is ____________.
82. SCIENTIFIC THEORY
A well tested explanation for observations or test results. It
is not yet accepted as absolutely true but there is a lot of
evidence to support it. Tectonic plates is not a law. It is a
__.
83. SCIENTIFIC LAW
A ___ is an observation that scientist expect to happen
every time. Scientist accept it as absolutely true and no
longer test it.
84. SCIENTIFIC METHOD
The process that scientists used in inquiry include posing
questions, designing experiments, collecting and
interpreting data, drawing conclusions, and communicating
ideas and results truthfully and without bias.
85. SODIUM CHLORIDE
The chemical name for salt or NaCL is ___________
86. SOLUBILITY
the ability of a substance to dissolve
87. SOLUTE
In a solution (liquid), a _______ is dissolved in a liquid
known as a solvent.
88. SOLUTION
What is made with the solute and solvent. It is an example
of a homogenous mixture.
89. SOLVENT
90. SUBLIMATION
A __________ is a liquid or gas that dissolves a solid,
liquid, or gaseous solute, resulting in a solution. The most
common solvent in everyday life is water. Solvents usually
have a low boiling point and evaporate easily or can be
removed by distillation, leaving the dissolved substance
behind.
A solid changing directly to a gaseous form with out melting
into a liquid first.
91. SUBSTANCE
In chemistry, a ___ is a single kind of matter that is pure,
meaning that it always has a specific way it is made
element/atom or compound/molecule.
92. SUPERSATURATED
When I add more solute to a solvent then it can normally
hold. Adding sugar to boiling tea give the tea more sugar
then it would hold at room temperature.
93. SURFACE TENSION
____ is a characteristic of liquids in which their surfaces act
like they are covered by a thin elastic film. This is why you
can make an object float if you gently lay it on the water.
94. SUSPENSION
The particles are easily separated and easily seen. Sand
and water. Pepper and water.
95. TEMPERATURE
______ is a measure of the average energy of random
motion particles of matter.
96. THERMAL ENERGY
Temperature is the average energy. _____ is the total
energy (kinetic and potential) of all of the particles in an
object.
97. UNSATURATED
When I can still add a solute to a solvent.
98. VAPORIZATION
____ takes place when the particles in a liquid gain enough
energy to from a gas. This can be evaporation or boiling.
99. VISCOSITY
The resistance of a liquid to flowing. Honey has a high
_______. Water a low _____.
100. WEIGHT
____ is a measure of the force of gravity of the earth on
you. If you take your science book to the moon, the ___
changes but the mass of the books stays the same.