What is a physical change? a change that occurs when the molecules within a substance do not change, a new substance is NOT formed.

a change that occurs when the reactant side of the chemical equation has more atoms than on the product side.

a change that occurs when substances react and create a new substance.

a change that occurs when the weather changes.

The nineteenth century was an era of great inventions in the united states. look at the list of inventions below and order them from most to least important (in your opinion). then explain why you ranked the top three inventions as most important. 1834: refrigerator invented by jacob perkins 1837: morse code invented by samuel morse 1853: elevator invented by elisha graves otis 1873: typewriter invented by christopher latham sholes 1876: telephone invented by alexander graham bell 1877: gramophone invented by thomas edison 1879: light bulb invented by thomas edison 1886: dishwasher invented by josephine cochran

What was the importance of the sepoy mutiny?

Which of the following areas borders the pacific ocean and has a mediterranean-style climate? a. british columbia b. northern oregon c. southern california d. southern washington