Critical Thinking
Which is denser, a cup of wood or a cup of cement? Why?
Cup of Cement
Because the cup of cement has more mass than the cup of wood
Mass over volume is.....
Density
What are the three states of matter?
Solid Liquid Gas
Suppose you have a buy a box full of rocks. You take the rocks out of the box. What can you say about the mass of the box before and after you take the rocks out?
Before, (with the rocks) the box would have more mass and after, the box would have less mass.
At what temperature does water boil?
212 degrees Fahrenheit
100 degrees Celsius
How many elements are on the periodic table?
How are melting and freezing alike?
Both have the same temperature, and both change between a solid to liquid.
Changing from a solid to a gas without becoming a liquid is called..
Sublime
How are particles arranged in gas?
Far apart and fast moving
Is Shredding Cheese a chemical or physical change? Explain in your own words.
Physical change. A physical change is where the appearance or looks of a substance change and a chemical change is when the chemical makeup of the substance changes into another substance.
What kind of change is breaking glass?
Physical Change
What are the three powders we used in our experiment on chemical changes?
Baby Powder
Cornstarch
Baking Soda
Draw and label an atom. (label the type of charge each has for double points!!!)
Show Teacher
What is the symbol for iron on the periodic table?
Fe
Stands for Ferrum (Latin)
What is corrosion?
When iron combines with oxygen in the air forming rust