Examples: color, texture, density, taste, odor and how it moves. Physical Properties Physical traits of an object. It is all of the things that you can see (or sense with any of your senses). Examples: color, texture, density, taste, odor and how it moves.

Density The more closely packed together the particles are the more dense it is. The more loosely packed particles the less dense something is. Density = mass ÷ volume Easy example – golf ball vs. ping pong ball

- If the mass is greater than the volume it will sink. Mass > volume object sinks Example: mass of golf ball is 45 g and volume is 40 mL 45 ÷ 40 is greater than 1 - If the mass is less than the volume it will float. Mass < volume object floats Example: mass of ping pong ball is 10 g and volume is 35 mL 10 ÷ 35 is less than 1

Which is more dense???? 1 ton of feathers or 1 ton of bricks

Conductivity Definition: how well heat and electricity move through an object. Good Conductors: all metals (copper) because the particles are close together. *Bad conductors: Gasses – it takes a long time to heat up a room due to the particles being spread far apart.

Malleability Definition: a property of a metal describing the ease at which it can be hammered, pressed or rolled into thin sheets. Metals vary in how easy they can be shaped. Gold is the most malleable. Heating can increase malleability. Silver, copper, aluminum, lead, tin, zinc, and iron are also very malleable. Example: The penny that you can make at the zoo or as a souvenir while on vacation

Ductility Definition: the ability of metal to be pulled into a thin wire or a band. Examples: copper makes good wire for your stereo system or for the wiring in your house. A wedding or engagement ring is in a band shape and made of platinum, gold or silver.

Solubility Definition: the ability of something to be dissolved into another. Examples: *Water and hot chocolate *Sugar and iced tea *Vitamins dissolve into your blood *Laundry detergent dissolves in water * Oil cannot dissolve in water If a substance can dissolve, it’s soluble. If it cannot dissolve, it’s insoluble.

State or Phase of Matter This simply means what form the object in. 4 states of matter. Solid Liquid Gas Plasma (found in fire, stars , lightning and space)

Solid molecules: Liquid molecules: Gas molecules: Hold their shape Take shape of container, they flow, moving slowly Gas molecules: Take shape of container, can change volume, moving fast, flow

Example: water boils at ______ water vapor condenses at ______ Every substance has a specific temperature it melts at and boils at that can be used to identify it:   Example: water boils at ______ water vapor condenses at ______ ice melts at _________ water freezes at _________ 100ºC 100ºC 0ºC 0ºC

Physical Change -A change that alters the form or appearance of material but does not make the material into another substance is called a physical change. -Examples include: chopping wood, bending wire, coloring on paper or molding clay. -A change in state (or phase) is also a physical change. Water in the form of a liquid, or frozen as ice, or in the gas phase as water vapor are all the same substance – H2O!

Chemical Properties and Changes

Chemical Properties Chemical Properties Flammability – ability to burn Example – wood can burn 2. Reactivity – ability to react with other substances to form new substances Example- Iron can rust and meat can rot

Chemical Change- A substance changes into one or more new substances with new and different properties. Example of a chemical change- Burning wood - when you burn wood it turns into ash. It is no longer wood once it is burned! - The ash looks different and can no longer burn!  

1st Sign of Chemical Change is.. COLOR CHANGE: -A drastic change in color that can’t be reversed. -Change comes from within, it is not added. Examples- Leaves changing color in the fall Bleaching your teeth Bleaching paper or fabric

2nd Sign of Chemical Change is.. PRODUCTION or RELEASE OF GAS When a gas is released as a result of the chemical reaction. The gas may be an odor, smoke, or bubbles. Examples- Gasoline being burned by cars releases carbon monoxide gas and smoke Oxygen (gas) is being released from plants as a result of photosynthesis A baked cake smells different than its batter. Popping popcorn produces a new smell Baking soda and vinegar produce bubbles from the release of CO2 (carbon dioxide)

3rd Sign of Chemical Change is.... Production of light When light results from a change. Example- Fireworks: when a firework goes off, it produces a spark Lighting a match produces light

4th Sign of Chemical Change... Change in temperature Any time heat is produced due to a chemical reaction. Change in heat comes from within the reaction, not from its environment. Example- Pouring water into acid increases temperature Burning an object produces heat Lighting a match Acid breaking down the food in your stomach produces heat Instant ice packs get cold when mixed A battery gets warm after using it

5th Sign of Chemical Change is... Precipitate forms: This is a solid (like a powder) that comes from mixing 2 liquids Only happens with certain liquids The solid sinks to the bottom since it’s insoluble (see picture)

Chemically Changing Matter

Chemically Changing Matter

Chemically Changing Matter

Chemically Changing Matter

Warm up 11/10 Think of 2 examples of physical changes & 2 examples of chemical changes you have seen around you (outside of science).   What were the indicators of a chemical change that led you to believe this was a chemical change?

I made spaghetti for dinner last night I made spaghetti for dinner last night.  I boiled water and then added my noodles. I cooked the beef and mixed it with tomato sauce.  What parts of dinner prep were chemical and what parts were physical?