Why do scientists study fossils?

What is relative age?

What do geologists use radioactive dating to determine?

Radioactive decay occurs when atoms of some elements break ______________ to form atoms of _______________ element.

The geologic time scale, originally placed Earth's rock in order by_________

When an atom loses an electron, it becomes a __________

Calcium Bromide is an ionic compound with the chemical formula CaBr2 what does the "2" tell you?

A chemical reaction may be decided by observing changes in the _______________ of matter.

Electrons involved in bonding between atoms are ___________ electrons

What is chemistry?

Which is an example of a chemical formula?

The principle of conservation of mass says:

What happens when chemical bonds break and new bonds form?

What is a reactant

In terms of reaction types, what is the opposite of Synthesis?

What is the best description for an endothermic reaction?

What is the best description of an open system reaction?

Every chemical reaction involves a change in _______________

Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of:

In a chemical reaction, the amount of matter at the end of a reaction is ___________ what you started with.

The modern periodic table is organized according to:

When electrons are ________________ between two atoms, a covalent bond is formed.

The horizontal rows in the periodic table are know as:

Nonmetals can be found on the _________ side of the periodic table.

Atoms with the same number of protons and different numbers of neutrons are called:

A change that produces one or more new substances is called a _______________ change.

The smallest particle of an element is called a(n):

A substance that undergoes a ________________ change is still the same substance after the change.

In the chemical formula for an ionic compound, which item is written first?

A double bond is ___________ pairs of electrons shared between _________ atoms.

A mixture of two or more elements, at least one of which is a metal is called a(n):

Metals that can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes are:

The most reactive metals group is the:

An ionic bond is the attraction between _____________ charged ions.

Atoms that are made of more than one atom are examples of

Positive metal ions surrounded by freely moving valence electrons is a _________________ crystal.

The only sure evidence for a chemical reaction is the production of one or more _____________ substances.

The principal of conservation of mass is true for reactions in both _____________ and _________________ systems.

Mendeleev created the first periodic table by arranging elements in order of increasing ___________ _____________

The atomic number of an element is based on the number of ________________

From an element's location in the periodic table, you can predict its ________________

Metals are malleable, ductile, and can carry an _______________________________________

Which one of these is NOT an alkaline earth metal

Check all of the alkaline earth metals

At room temperature, more than half of the nonmetal elements are ____________

The elements that do not ordinarily form compounds are

The largest group on the periodic table are the ____________

What is the word used to describe a metal that can be drawn into a wire

True or False..... In an atom, the number of protons equals the number of electrons

True or False.... The elements in a row of the periodic table have properties that have no patterns

What are the parts in the atom that move around in the nucleus?

True or False.... anything that has mass and takes up space is called Matter

What family has fluorine, chlorine, bromine, and iodine are part of what family?

What kind of change would this example be: a firework exploding in the sky and giving off light

What type of boundary is where two plates come together?

What type of boundary is where two plates slide past each other?

How many years ago did Pangaea exist?

What element do geologists use to date rocks?

What is the best description for a wavelength?

What is the amplitude of a wave?

What does a decibel measure?

As wavelength increases, frequency ____________________

How is frequency measured?

Sound is measured in what?