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States of Matter Flashcards

(51 cards)

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1
Q

solid

A

state of matter that has a fixed shape and volume

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2
Q

liquid

A

state of matter that has a fixed volume, but no fixed shape

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3
Q

gas

A

state of matter with no fixed shape or volume

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4
Q

properties

A

characteristics or features of an object or substance

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5
Q

volume

A

the amount of space taken up by an object or substance

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6
Q

fluid

A

a substance that flows and has no fixed shape. Gases and liquids are fluids.

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7
Q

fluid

A

a substance that flows and has no fixed shape. Gases and liquids are fluids.

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8
Q

mass

A

the quantity of matter in an object (usually measured in grams or kilograms)

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9
Q

particle model

A

a description of the moving particles that make up all matter and how they behave. The model explains the properties of solids, liquids and gases.

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10
Q

expands

A

increase in size due to the movement of particles in a substance

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11
Q

contracts

A

shorten or become smaller in size

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12
Q

melting point

A

the temperature at which a solid substance turns into a liquid (melts) or a liquid turns into a solid (freezes)

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13
Q

boiling point

A

the temperature at which a liquid changes to a gas

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14
Q

sublimation

A

the change in state from a solid into a gas (or from a gas into a solid) without first becoming a liquid

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15
Q

precipitation

A

falling water in solid or liquid form. The type of precipitation depends mostly on the temperature in the clouds and the air around them.

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16
Q

meteorologist

A

scientist who uses observation of the atmosphere to predict or explain the weather

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17
Q

alchemists

A

olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Alchemists also tried to tell the future.

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18
Q

investigations

A

activity aimed at finding information

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19
Q

observations

A

information obtained by the use of our senses or measuring instruments

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20
Q

scientists

A

people skilled in or working in the fields of science; scientists use experiments to find out about the material world around them

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21
Q

elements

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A

pure substance made up of only one type of atom

22
Q

atoms

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A

a very small particle that makes up all things. Atoms have the same properties as the objects they make up.

23
Q

atomic number

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A

number of protons in the nucleus of an atom. The atomic number determines which element an atom is.

24
Q

chemical symbol

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A

the standard way that scientists write the names of the elements, using either a capital letter or a capital followed by a lowercase letter. For example, carbon is C and copper is Cu.

25
compounds
substance made up of two or more different types of atoms that have been joined (bonded) together
26
bonded
force that holds particles of matter, such as atoms, together
27
mixtures
a combination of substances in which each keeps its own properties
28
hydrogen
the element with the smallest atom. By itself, it is a colourless gas and combines with other elements to form a large number of substances, including water. It is the most common element in living things
29
oxygen
a gas in the air (and water) that animals need to breathe in; made up of particles with two oxygen atoms. Plants produce oxygen as part of photosynthesis.
30
metals
elements that conduct heat and electricity; shiny solids that can be made into thin wires and sheets that bend easily. Mercury is the only liquid metal.
31
non-metals
elements that do not conduct electricity or heat. They melt and turn into gases easily and are brittle and often coloured.
32
metalloids
elements that have the appearance of metals but not all the other properties of metals
33
metalloids
elements that have the appearance of metals but not all the other properties of metals
34
group
in the periodic table of elements, a single vertical column of elements whith a similar nature
35
inert
not reactive
36
noble gas
elements in the last column of the periodic table. They are extremely inert gases.
37
atoms
a very small particle that makes up all things. Atoms have the same properties as the objects they make up.
38
atomic number
number of protons in the nucleus of an atom. The atomic number determines which element an atom is.
39
chemical symbol
the standard way that scientists write the names of the elements, using either a capital letter or a capital followed by a lowercase letter. For example, carbon is C and copper is Cu.
40
compounds
substance made up of two or more different types of atoms that have been joined (bonded) together
41
bonded
force that holds particles of matter, such as atoms, together
42
mixtures
a combination of substances in which each keeps its own properties
43
hydrogen
the element with the smallest atom. By itself, it is a colourless gas and combines with other elements to form a large number of substances, including water. It is the most common element in living things
44
oxygen
a gas in the air (and water) that animals need to breathe in; made up of particles with two oxygen atoms. Plants produce oxygen as part of photosynthesis.
45
metals
elements that conduct heat and electricity; shiny solids that can be made into thin wires and sheets that bend easily. Mercury is the only liquid metal.
46
non-metals
elements that do not conduct electricity or heat. They melt and turn into gases easily and are brittle and often coloured.
47
metalloids
elements that have the appearance of metals but not all the other properties of metals
48
metalloids
elements that have the appearance of metals but not all the other properties of metals
49
group
in the periodic table of elements, a single vertical column of elements whith a similar nature
50
inert
not reactive
51
noble gas
elements in the last column of the periodic table. They are extremely inert gases.

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