Vocabulary
What is a physical change?
A ______________ ______________ is a change in the size, shape or state of matter.
What are the THREE states of matter?
Solid, liquid and gas.
What are examples of physical changes?
A piece of paper being ripped in half or getting a haircut.
What happens during a chemical change?
A new kind of matter is formed with different properties.
What is a solution?
A mixture in which all components (or ingredients) spread evenly throughout and do not settle.
What is condensation?
The process by which a substances changes from a gas to a liquid.
The state of matter that has a definite shape and takes up a definite volume.
SOLID
How can you change the PHYSICAL properties of water?
You can boil or freeze it.
Name two examples of a chemical change.
Burning or exploding. Rusting or tarnishing.
What is a mixture?
A combination of two or more substances that keep their identity when mixed. They can be separated.
What is matter?
Any substance that takes up space and has mass.
What are two properties of a liquid?
A liquid has a definite volume (which can be measured) and it takes the shape of its container.
What are TWO examples of a physical change?
Chopping down a tree, crushing ice, condensation forming on windows, mixing ingredients in a bowl.
Why is baking a cake a chemical change?
A new substance has formed and the change cannot be undone.
What are three ways to make a solid dissolve faster in a solution?
Heat it, stir it or grind it into smaller pieces.
What is the amount of matter in an object called?
MASS
This state of matter is everywhere but it is often invisible. It fills all available space. It DOES NOT have a definite shape or a definite volume.
GAS
What happens to the properties of a material in a physical change?
Physical properties of the material do not change although the shape can (examples: paper shredded, hair cut, etc.)
Which is an example of a CHEMICAL change: water turning to ice, getting a haircut, metal that is rusting, or stretching a rubber band as much as possible.
Metal that is rusting. Oxygen combines with iron and a new substance is formed called "rust".
If you take a sample of a solution from the top, middle and bottom, what will the results show?
The solution has the same properties at the top, middle, bottom and all throughout it.
What is the amount of space that matter takes up called?
VOLUME
How can we detect gasses in our environment?
By the way gas can effect things (examples: flying a kite, a windy day.)
What happens to molecules in the air when it gets cold? What happens to molecules in solids when it gets hot?
Molecules move closer together and slowly vibrate in space. This causes the volume to shrink (example: air in car tires looks low in the wintertime.)
Molecules spread further apart and move more quickly. This causes volume to expand (example: railroad tracks push against each other and make the track uneven/wavy.)
What are three signs that a chemical change MAY have occurred?
Change in odor, release of heat or light, gas bubbles, change in color, substance has changed from its original state of matter (example: it went from a liquid to a solid.)
Name three tools used to separate mixtures and at least one tool or method used to separate a solution.
Magnet, sieve, filter, air, hands.
Evaporation.