Density Review
What is the measurement that tells the amount of matter in an object? (mass)
What is the measurement that tells the amount of space matter takes up? (volume)
What is the measurement that tells the amount of space between particles? (density)
What tool of measurement would we use to find the mass of an object? (balance/scale)
What tool of measurement would we use to find the volume of a liquid? (beaker/cylinder)
What tool of measurement could we use to find the volume of a REGULUR solid if we
had no water available to us? (ruler)
What unit of measurement would we use to measure the length of one side of a regular
solid? (centimeters)
What unit of measurement would we use to measure mass?
What unit of measurement could we use to measure volume? (milliliters/cubic cm)
What other unit of measurement for volume is that equal to? (milliliter/cubic cm)
What unit of measurement would we use to measure density? (g/ml or g/cubic cm)
Density is a relationship between which two measurements? (mass and volume)
When we found the volume of an IRREGULAR object in class what method did we use?
TWO WORDS. (Water Displacement)
Explain how water displacement works. (Find the volume of the water in a cylinder,
carefully place the object, find the new volume, subtract original volume)
What is the mathematical formula for finding density? (Mass/Volume)
What do we call it when a liquid changes to a solid? (Freezing)
What do we call it when a liquid changes to a gas? (Evaporation)
What do we call it when a solid changes to a liquid? (Melting)
What do we call it when a gas changes to a liquid? (Condensation)
Name the three states of matter. (Solid, Liquid, Gas)
In order for a change of state to occur, what needs to happen? (Energy must be added or
taken away)
What is more dense, 50 grams of steel or 100 grams of steel?
In terms of density, explain why if the mass of that steel increases, so must the volume.
(In order for density to stay the same, if the mass goes up, so must the volume for M/V)
In terms of density, explain why if the volume of that steel increases, so must the mass.
(In order for density to stay the same, if the volume goes up, so must the mass for M/V)
If the density of water is 1g/ml, what do you know about the density of water vapor and
ice? (Water vapor must be less than 1 g/ml and Ice must be greater than 1g/ml)
When you add energy to air, what happens to the particles? (They spread out)
Explain using density why hot air rises. (It is less dense and the cooler air)
When you take energy away from a liquid, what happens to the particles? (They move
closer together)
Draw a picture of the particles in the three states of matter.
Which lab did we do in class to show that particles move? (dialysis or egg membrane)
Which lab that we did in class showed that particles are different sizes? (dialysis or egg
membrane)
What do we call a substance that changes color when another certain substance is present?
(Indicator)
What do we call the thin layer of substance that allows only certain particles to pass
through? (Membrane)
Name 2 properties of a solid. (Particles close together, particles organized, can’t be
squashed, very little movement – only vibrate, don’t take the shape of their container)
Name 2 properties of a liquid. (Flow, particles spread out, take the form of their
container, particles move)
Name 2 properties of a gas. (Particles move very quickly, don’t take the shape of their
containers, very spread out)
Explain using density why the wax in the lava lamp goes up and down. (The heat makes
it less dense so it rises, then it cools at the top becoming more dense and it sinks)
What are two possible errors that could be made when finding the volume of an irregular
object. (incorrect measuring, water could splash out, incorrect math)
Explain how to find the mass of a liquid. (Measure the mass of an empty cylinder. Put
liquid into the cylinder and find the mass, subtract the empty from the full to get liquid)
The problem on a lab report should always be stated in what form? (a question)
The hypothesis on a lap report should always have two parts, what are they? (prediction
and explanation)
The materials on a lab report are listed in what format? (bullet form)
Why are the materials listed in number form and not bullet? (order matters)
What can we use on a lab report to organize our data? (a table)
List two things a good conclusion should state (Whether hypothesis was correct or
incorrect, possible errors, what to try next time, summary of findings, what was
interesting.)
Mr. Sadek had which homeroom in grade six the last three years? (6-4)
What grade is Mr. Cox’s twin daughters in at ISB? (11)
Name the director of ISB. (Tom Hawkins)
Name the director of ISB for next year (Tarik Razek)
What is an inference? (A conclusion based on scientific evidence and facts)
All matter is made of what? (Particles)
What is the name of the Middle School Assistant Principal? (Mr. Raven)
Name at list one Middle School Secretary. (Angeline, Haining, Tracy)
List the order of the liquids in the liquid layer lab from most dense to least.
(glycerol, water, oil, alcohol)
What state is Mr. Bueschlen from in the USA? (Michigan)
What state is Mr. Long from in the USA? (California)
What is the name of Mr. Long’s 2 sons? (Jackson and Tucker)
What grade and subject does Mrs. Long teach at ISB? (Grade 7 hum)
What country is hosting the world cup soccer next summer? (South Africa)