Chem 1- Chapter 1

understand the difference between a scientific law and a scientific theory

Scientific theory is a model for the way nature is and tries to explain not merely what but why

Scientific law is a statement that describes a phenomenon in nature that has been repeatedly observed and verified through experiments

know what scientific method is and how to apply it

it is a process scientist used to acquire information by making observations, asking questions, forming testable hypothesis, conducting experiments, analyzing data, and drawing conclusions

what is the law of conservation of mass

matters neither created nor destroyed

what is the difference between an element, compound, and pure substance

A element is a pure substance made from only one atom that cannot be broken down

A compound is a pure substance form from two or more different elements that are chemically bonded

difference between homogeneous mixture and heterogeneous mixture

heterogeneous mixture are substances with more than one type of atom, molecule, or compound that very composition

homogeneous mixture is a substance with more than one type of atom, molecule, or compound that does not vary in composition

know the difference between physical property, chemical property, physical change, and chemical change

physical property is that a substance can that can be observed or measured without changing its chemical composition

Chemical property is describing a substance’s ability to undergo a chemical reaction making a new substance

Physical change affects the form, size, shape, or state of matter but does not change the substances chemical composition

Chemical change is where one or more substances are transformed into new substances with different chemical properties

understand the law of conservation of energy

Energy cannot be created or destroyed, only transferred from one form to another