Presentation on theme: "1.Matter anything that takes up space. 2.A liquid has a definite volume, but no definite shape. 3.A gas does not have a volume or a definite shape. 4.A."— Presentation transcript:
1.Matter anything that takes up space. 2.A liquid has a definite volume, but no definite shape. 3.A gas does not have a volume or a definite shape. 4.A solid has both a definite volume and a definite shape.
5.Water can change from water to ice, which is called freezing. 6.Freezing is what happens when a liquid changes to a solid. 7.Water can change from ice to water, which is called melting.
8.Melting is what happens when a solid changes to a liquid. 9.Water can change from water to steam, which is called evaporation. 10.Evaporation is what happens when a liquid changes to a gas.
11. Water can change from steam back to water, which is called condensation. 12.Condensation occurs when gas changes into a liquid. 13. The color, size, and hardness of an object can help us determine its physical properties.
14.Mass is the amount of matter in an object. 15.Weight is a measure of the pull of gravity on an object. 16.Volume is the amount of space an object takes up. 17.Volume = length x width x height
18.Density is the concentration of matter in an object. 19.D = M/V 20.Solubility the ability for one substance to dissolve in another. 21.Chemical changes can turn one substance into something else.
22.The following evidence can indicate that a chemical change took place :
Change of color e.g., rusting Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat. energyexothermicendothermicheat energyexothermicendothermicheat Change of form (burning paper) (this change is difficult to reverse). Gases formed, often appearing as bubbles
23.The ability of a substance to react chemically is called reactivity. 24.A Physical Change is a change in state only. The original component(s) remains.
25.The Law of Conservation of Matter states that matter is neither created nor destroyed during a chemical or physical change.