Why is it important to study chemistry? select all that apply.

• biology is based within chemistry

• the organisms live in natural world, follows the laws of chemistry

• boundary between living and non living crossed between atoms and molecules, organelles, and cells

• chemistry is somehting that we have to learn

what is matter?

• substance that can't be broken down by chemical reaction to simpler substance

• anything that has a mass and occupies space

• force of gravity as it acts on an object

what is mass?

• the amount of matter in an object; roughly= to weight

• smallest unit of elements

• anything that has mass and occupies space

• organisms that live in natural world

What is the law of Conservation of matter?

• Mass (i.e., amount of matter) in a closed system stays the same”

• Matter cannot be created or destroyed; But, can be rearranged in space & change form

• Matter can be created in which we can also destroy it as well

substance that cant be broken down by chemical reaction to simpler substances; properties of an ______ cant be changed no matter what you do

• atoms

• elements

• mass

• matter

118 elements are __________. (#'s 99-118 are made in ______)

• unknown and water

• known and lab

• unknown and lab

smallest unit of all elements; spherical shape

• elements

• atoms

• molecules

• organelles

elements arranged in _____ _______ of the elements; each element known by a symbol with 1 or 2 letters

• periodic table

• hierarchy

• taxonomy

why is it periodic

• due to the elements being place in the order

• just because that is what its name is

• due to the chemical properties repeating in the table

118 are known on earth

• elements

• atoms

• molecules