Density
Explain why a paperclip may sink in water BUT float in honey.
What state of matter has the least amount of energy?
solid
I observe that an apple is red. What type of property is this?
Qualitative Physical Property
What type of property describes how a substance reacts to form new substances?
What is a chemical property?
If you have a fish tank that holds 50 liters of water, what term describes the space that the water occupies?
Volume
What occurs when you spray perfume in a corner of a room and it slowly spreads throughout the entire space?
diffusion
What is the temperature at which a solid becomes a liquid?
What is the melting point?
What is the process called when a solid turns directly into a gas?
What is sublimation?
An unknown liquid has a density of 8g/ml and a mass of 40g. What is its volume?
5ml
What is the mass of a substance with a density of 0.765g/cm cubed and a volume of 50 cm cubed?
38.25 grams
Iron rusts after being exposed to moisture. This is describing a....
Chemical Property
What is the change of state from gas to liquid called?
What is condensation?
Machine oil has a density of 0.9 g/mL. Ethyl alcohol has a density of 0.8 g/mL. If we mix these, which substance will float on top of the other one?
1) Machine oil has greater density (0.9 > 0.8) 2) Therefore, knowing that denser things SINK, the ethyl alcohol will FLOAT on top of the machine oil, because it's density is lower.
What are the 4 main points of the KMT? DOUBLE POINTS!
-everything is made of particles
-particles have space between them / exist in empty space
-the space between changes based on temperature/energy
-particles are always moving
What are the 3 ways to increase the rate of dissolving a solute in a solvent?
1) increase surface are of solute
2) agitate mixture
3) heat it up
What is the temperature at which a solid becomes a liquid?
What is the melting point?
What happens to the density of substance when it is heated up. Why does this happen?
When a substance is heated, its density decreases because the molecules gain energy, move faster, and spread further apart, causing the volume to increase while the mass remains the same.
Why does a metal lid become difficult to open after being in the freezer, but easier to open after running it under hot water?
KMT ; Thermal Expansion
What is the measure of the average kinetic energy of particles in a substance?
Temperature
What state of matter has a definite volume but takes the shape of its container?
liquid