unit 1
luster is property of nonmetal
what property is luster?
baking is a chemical change
is baking a chemical change?
the vector sum of all the forces that act upon an object
what is net force?
when hot fluids rise and clod fluids sink
what is a convection current?
atomic number= protons= electrons
what is APE?
a new substance is made after you mix
what is a chemical change?
something that causes an object to move or stop
what is force?
Air touching the Earth’s surface becomes less dense
when does air rise?
hydrogen is the lightest element
what is the lightest element on the periodic table?
a letter or pair of letters that represent the element in the formula
what is a chemical symbol?
an object stays still or continues at the same speed and direction
what is a balanced force?
pressure difference between high pressure areas and low pressure surrounding it
what causes wind?
mass number= atomic number= neutrons
what is MAN?
when you can undo a mixture back to its original form?
what is a physical change?
measured in newtons
what is net force measured in?
water is more cold and dense
when does water sink?