Matter = anything that has mass + takes up space
Mass= how much “stuff”
Weight= the gravitational pull on a piece of mass
Solid = fixed volume, fixed shape
Liquid = fixed volume, takes shape of container
Gas = will expand + can be compressed
All matter has two types of properties:
Chemical Properties= characteristics that are revealed only when you change the composition of the substance through chemical reactions. EX: flammability, oxidation, creation of gas or solid precipate
Physical properties= characteristics that can be observed or measured without changing the substance. EX: color, odor, taste, density
There are two types of physical properties:
Extensive properties= depends on how much of the substance you have. EX: 7 liters of water, 56 kg of cake
Intensive properties= does not depend on the amount of the given substance. EX: ice melts at 0 degrees C, lead has a density of 11.34 g/CM^3
Physical vs Chemical Changes:
Physical Change: Does not result in new substance. EX: if you melt ice you still have water that can be frozen back to ice.
Chemical Changes: when two substances react, a new substance is formed. EX: burning paper or baking a cake
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