Calculate the density of a rock with a mass of 12.1g and a volume of 4mL.
3.025 g/mL
100
Olga placed a rock in a graduated cylinder that had 20mL of water in it. The water was displaced by 5mL and rose to 25mL. What is the volume of the rock?
5mL
100
The coins in Ms. Couey's coin collection are tarnishing. Is this a chemical or physical change?
Chemical Change
200
Is water a compound or an element?
Compound
200
What is shiny, conducts electricity, and is ductile?
Metals
200
Calculate the density of an unknnown substance that has a mass of 1200g and a volume of 65cm3.
18.46g/cm3
200
What is the definition of volume?
The amount of space an object takes up.
200
bubbling, fizzing, change in odor, change in color, precipitate forms
These are all signs of a chemical change or chemical properties.
300
Compound or Element? Cu
Element
300
Found along stairstep line, shiny or dull, semi-conductor, can be brittle or malleable.
Metalloids
300
Calculate the density of a piece of chalk with a volume of 2mL and a mass of 6.3g.
3.15g/mL
300
George wanted to know the volume of his plastic soldier. He filled his graduated cylinder with 35mL of water. When he dropped the soldier in, the level rose to 45mL. What is the volume of the toy soldier?
10mL
300
Mrs. Testamark made cookies for Ms. Lang. What caused the cookies to change when she baked them?
The heat from the oven
400
Compound or Element? NaCl
Compound
400
What does ductile mean?
Able to be pulled or stretched into a thin wire.
400
What is the density of an object that has a mass of 423g and a volume of 12cmx8cmx4cm?
1.10g/cm3
400
Joe had an irregular solid that had a mass of 230g. The object displaced water in a graduated cylinder by 20ml. What is the density of the object?
11.5g/mL
400
The kids at Wertheimer perfomed an experiment by slicing a potato. They noticed a change in the potato after it sat for a few minutes. How did they know a chemical change was taking place?
The change in color let them know a new substance was forming on the potato.
500
What is the difference between and element and a compund?
A compound consists of more than one kind of element. An element consists of only one kind of element.
500
What does brittle mean?
Easily broken
500
Calculate the Density:
Mass=5.5g
Volume= 1.56cm3
3.52g/cm3
500
Calculate the density of the following irregular object.
The water in a graduated cylinder rose from 25mL to 42mL after the object was placed in it. The mass was measured on a triple beam balance at 1200.2g.
70.6g/mL
500
Mrs. Ruggeroli left a cup of ice on her desk and left for a meeting. When she returned, there was water in her cup instead of ice. What kind of change took place?