Astronomy
Earth
Matter
Periodic Table
Chemical Reactions
100
The sun produces energy
by nuclear fussion
100
What is the correct order (starting from the surface) of Earth's layer?
Crust, mantle, outer core, inner core
100
Dissolving salt in water is an example of what type of change?
physical
100
Mendeleev created the first periodic table by arranging elements in order of
increasing atomic mass
100
What type of reaction is FES +2HCl (yields) FeCl2 +H2S
double replacement
200
In a heliocentric sytem, Earth revolves around
The Sun
200
Earth's inner core is
a dense ball of solid metal
200
Substances that CANNOT be broken down cheically into other substances are
elements
200
What is true about the elements in the same column of the periodic table?
The elements have similar properties.
200
A chemical equation that shows the same numbe of each kind of atom on both sides of the equation is said to be
balanced
300
What do all of the inner planets have in common?
The all are small and have rocky surfaces
300
The transfer of energy through empty space is called
radiation
300
The measurement of how much matter an object contains it its
Mass
300
Which group contains the most elements?
Metals
300
CaCo3 represents a chemical
formula
400
What do the first four outer planets have in common?
They are much larger than Earth and are made mainly of hydrogen and helium
400
According to Wegener's hypothesis of continental drift
The continents were once joined together in a single landmass
400
Anything that has mass and takes up space is called
matter
400
What information in the periodic table indicates the number of protons in an atom?
Atomic number
400
A shorter, easier way tos how chemical reactions, using symbols instead of words, is called a
Chemical Equation
500
Astronomers predicted the existence and orbit of Neptune based on
Neptune's gravitational effect on the orbit of Uranus
500
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantel is known as
subduction
500
The fact that each planet's orbit is an ellipse was discovered by
Kepler
500
Which group of elements shares characteristics with both metals and nonmetals.
metalloids
500
Copernicus explained that
The sun is at the center of the system of planets
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