States of Matter
True or false: three states of matter include solid, liquid, and metal.
False!: the three states of matter are solid, liquid, and gas.
What is a sign that a physical change has occured?
Accepted answers: it can be undone, it did not create something new, it did not emit heat, etc.
True or false: when boiling water, the water is disappearing.
False. Even though it will turn to a gas, it is not disappearing.
Yes or no: does matter disappear?
No! Matter does not just disappear.
What is a sign that a chemical change has occured?
Accepted answer: it can't be undone, it produces light, heat, a temperature change, a new scent, etc.
If properties means the characteristics of something, then water are some properties of a sugar-water solution?
Accepted answers: the sugar-water is clear, hazy, cold, hot, sweet, etc.
This state of matter's particles are packed together, like a desk.
Solid
Is salt dissolving in water a physical or chemical change?
A physical change
You measure a stick of butter and it weighs 12 grams. About how much should it weight after melting it?
It should still weigh about 12 grams.
This state of matter's particles are spread out and separated, like steam.
Gas!
Is a metal hairclip rusting a physical or chemical change?
A chemical change
True or false: brown dye can be considered a solution.
True!: it is a "homogenous mixture," meaning a mixture of different colors that are dissolved into one new color.
This state of matter's particles move around and are close, like water.
Liquid
What evidence do you have the food rotting is a chemical change?
Accepted answers: change in odor, change in color, can't be reversed
How can I prove that air is matter?
Accepted answer: filling a balloon with air and observing that the balloon takes up more space and is heavier.