What is the definition of density? Do not give me the formula.
How tightly packed particles are to each other.
100
Give me 3 examples of physical properties.
Hardness, Density, Mass, Volume, etc
100
What is the difference between physical and chemical change?
Physical changes can change shape or form, but the makeup of the object is still the same. During a chemical change, the chemical make-up of matter is changed, and can create a new substance.
100
List of the states of matter.
Solid, Liquid, gas, Plasma
200
What is the density of water?
1 g/mL
200
Give me 2 examples of a chemical property.
Flammability, the ability of iron to rust, the ability of elements to react with each other
200
Give me an example of a physical change.
Ripping paper, Ice Melting, etc.
200
Is there an increase or decrease in energy when Ice is Melting?
Increase in Energy, because the Solid Particles have more movement once they become liquid particles.
300
What is the formula for density? List the units as well!
Mass/Volume; g/mL
300
What is flammability? Can you see flammability?
The ability of an object to burn. No, you cannot see chemical property unless if you try to burn the object. This will change the object.
300
Give me an example of a chemical change.
Wood burning, milk rotting, Bread molding, etc,
300
Is there an increase or decrease in energy during condensation? Why?
There is a decrease in energy, because the fast gas particles slow down once they reach a cool surface.
400
A piece of wood has a mass of 5 grams and a volume of 10 cubic centimeters. What is the density of the
piece of wood? Will it float or sink in water, and why?
0.5 g/mL
Float, because it is less than 1 g/mL
400
Is luster a physical or chemical property?
Physical, because it is how shiny an object is.
400
Are coffee crystals dissolved in liquid a physical or chemical change? Why?
This is a physical change because the coffee crystals are still the same crystals, they have just broken down into smaller pieces. No new substance was created. If you evaporate the water and freeze dry the coffee crystals, they can be changed back to it's original form.
400
What is sublimation? Give me an example.
Sublimation is when a solid changes directly into a gas. An example is dry ice - when solid carbon dioxide turns directly into carbon dioxide.
500
Will an object that has a greater mass than it's volume float or sink in water? Why? Think fractions and math!
The object will sink in water, because the density will always be greater than 1.
500
Is the ability of iron to rust a physical or chemical property? Why?
Chemical property
500
Was the baking soda and vinegar a physical or chemical change? Why?
This was a chemical change because a new substance was created; carbon dioxide. This cannot be changed back to it's original form.
500
What are all the different phase changes? List all of the ones we learned, including the two types of vaporization.