![]() However he had his head chopped off during the french revolution. Neat fact: he had a an awesome, intelligent, and very young wife that helped him. He was given the title of ‘Father of Modern Chemistry’. He developed a system for naming chemicals so all scientists could use the same words and be on the same page. He wanted to determine what each type of particle was.ġ770’s - French scientist Antoine Lavoisier studied chemical interactions between hydrogen, oxygen, and carbon. 1 / 25 Chemical/Physical Properties and Changes Review 170 Views Download Presentation Chemical/Physical Properties and Changes Review. Boyle believed matter was composed of tiny particles with various shapes and sizes that grouped together to form other individual substances. Based their theories on observations and experimentation rather than guesses and assumptions (sounds like scientific method to me).ġ600’s - Irish chemist Robert Boyle modernizes chemistry (hypothesizes and observes the nature of chemicals), this is separate from the ‘alchemy’ (mixing chemicals to find gold, magic oriented)īoyle also experimented with gases, and came up with proof supporting 400 BC Democritus’ tiny particle theory. Because Aristotle was well known and well respected, his description of matter was preferred over Democritus’s description until 1600 AD, even though he was dead wrong.ġ400 - 1500s - Renaissance begins, scientists begin to rediscover and understand the nature of matter and change. A chemical change alters the makeup of a substance to form something new. By mixing different atomos, you could make new materials with their own unique properties.ģ50 BC - A popular greek philosopher Aristotle (among others) stated that everything was made of elements such as earth, air, fire, and water. A physical change alters the physical form of a substance but not its composition. We observe a physical change when wax melts, when sugar dissolves in coffee, and when steam condenses into liquid water ( link ). chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations. These different particles gave each material its own unique set of properties. A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition (the identities of the substances contained in the matter). Extensive and intensive properties can be classified as a physical property because they can be measured without changing the substances unique chemical. Metals are not the only important chemicals, chemist mix liquids too! Many cultures used juices and oils in everyday life and rituals.Ĥ00 BC - Greek philosopher Democritus stated that each type of material was made up of a different type of ‘atomos’ which means indivisible. ![]() Hittites also create coinage (Iron age begins) Mixing iron with carbon creates steel - a very hard material for armour, weapons, tools. The first theory arises that matter is made up of tiny particles.ġ200 BC - Hittites (An empire in the Middle East) learns how to extract iron from rocks (ores). Chemical change B.2500 BC - Greek philosophers realize that rock can be broken down into small pieces and into powder. When there is a new substance formed with different properties than the original A. Chemical Changes from the full lesson plan Properties of MatterDiscover what matter is, and is not. When the chemical properties of the substance stays the same but only the appearance changes A. This is the chapter slice Physical Changes vs. Physical changeįilling up a balloon with hot air A. Physical changeĪ glass cup falls onto the floor and shatters A. Physical changeĪ Plant collecting sunlight and turning it into food A. 4. True or False: Physical changes may be reversible True False 2. To understand how substances differ, you need to observe their properties When a substance undergoes a physical change, its state may be altered, but its. An ice cube melting into liquid can be frozen and turned into a solid again. One way to identify a physical change is to consider whether or not the change is reversible. ![]() Vinegar reacts when mixed with baking soda. changes states from solid to liquid, however the chemical makeup of the substance is still water (H2O). E N D - Presentation TranscriptĬhemical/Physical Properties and Changes Review!!!
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