ductile
capable of being shaped or bent or drawn out
colloid
a mixture with properties between those of a solution and fine suspension
atoms
the smallest unit of matter that has the characteristics of an element; consists of three main types of subatomic particles: protons neutrons and electrons.
atmosphere
the mass of air surrounding the Earth
Mendeleev
Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)
heterogeneous mixture
a mixture in which different materials can be distinguished easily
atomic number
the order of an element in Mendeleyev's table of the elements
water cycle
The continuous process by which water moves from Earth's surface to the atmosphere and back
condensation
the process of changing from a gaseous to a liquid or solid state
matter
that which has mass and occupies space
electrons
negatively charged particles
protons
Positively charged particles
neutrons
the particles of the nucleus that have no charge
ground water
underground water that is held in the soil and in pervious rocks
atom
(physics and chemistry) the smallest component of an element having the chemical properties of the element
troposphere
the lowest atmospheric layer
stratosphere
the atmospheric layer between the troposphere and the mesosphere
exosphere
the outermost atmospheric layer
mesosphere
the atmospheric layer between the stratosphere and the thermosphere
humidity
the amount of water vapor in the air
malleable
capable of being shaped or bent or drawn out
conduction
the transmission of heat or electricity or sound
climate
the weather in some location averaged over some long period of time
How did chemists change Mendeleev's periodic table in the early 1900s?
They used atomic number instead of atomic mass to organize the periodic table
This is an example of a heterogeneous mixture?
soil
From Earth to space, the main layers in our atmosphere are _________________
troposphere, stratosphere, mesosphere, thermosphere.
The atomic number of an element is based on the ______________________
number of protons
mixture containing particles that are too small to be seen easily but are large enough to scatter a light beam is called a ______________
colloid
As you rise upwards in the atmosphere, air pressure ___________________
decreases
Water moves continually between the atmosphere and Earth's surface in the process called _______________
water cycle
In an atom, the number of protons equals the number of ________________
electrons
this is the primary source of ground water
precipitation (rain, dew, etc.)
The change from liquid to solid, or the reverse of melting, is called
freezing
The layer of our atmosphere in which weather occurs is the
troposphere
solid
definite shape and definite volume
liquid
definite volume but indefinite shape
gas
indefinite volume and shape
water vapor is the form of a ________
gas
Climates are classified by two things: ___________ and _____________
precipitation and temperature
the average, year-after-year conditions of temperature, precipitation, winds, and cloud in an area are known as its _____________
climate