What is the difference between a solution and mixture?
In a mixture, substances are generally just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be filter
What is a physical change?
a change in the way matter looks, you can go back to the original object and no new substance is formed
My teacher cuts a piece of paper and says that this is a chemical change! Is the teacher correct?
No, this is a physical change!
What is a chemical change?
a change that causes different kinds of matter to form, you can not go back to the original object
Explain how matter can change into three different states? (Hint: use your vocabulary words)
Solids can melt to turn to liquids, liquids can evaporate to turn into gas, and gas can condense to turn into liquid, Liquids can freeze to turn into solids
Why do ice cubes float? (Hint: think about the video from week 3)
It's density is less than water
In a beaker, I mix together yeast, hydrogen peroxide, water, food coloring, and dish soap. Out comes a foamy substance and my beaker becomes hot! What is this an example of?
a chemical change