Created by Educational Technology Network. www.edtechnetwork.com 2009*

MassVolumeDensityMathNOS/Extra10101010102020202020303030303040404040405050505050

*

Question 1 - 10Define MASS.

*

Answer 1 10 Mass is the amount of MATTER an object has.(The amount of STUFF in an object.)

*

Question 1 - 20What units do we use in labeling MASS?

*

Answer 1 20 GRAMS (g)

*

Question 1 - 30How do you determine the mass of a liquid?

*

Answer 1 30 You MASS (not weigh) it using a gram scale. You must either TARE the empty container before adding the liquid, OR find the mass of the container and subtract the mass of the container from the mass of the liquid and container.

*

Question 1 - 40The mass of an object is 6 kg on Earth. If this same object was placed on the moon, what would the mass be?

*

Answer 1 40 Still 6 kgMass remains constant.

*

Question 1 - 50How does MASS differ from WEIGHT?

*

Answer 1 50 Mass is the amount of matter in an object mass is conserved (stays the same), regardless of location (on the moon, on Jupiter, etc.)Weight, on the other hand, is the measure of the pulling force of gravity on a mass. As the force of gravity changes (as it does in space), so does weight.

*

Question 2 - 10Define VOLUME.

*

Answer 2 10 Volume is the amount of SPACE taken up by an object. How tightly or loosely packed the molecules are in an object.

*

Question 2 - 20What are the TWO units that can be used to label the volume of an object?

*

Answer 2 20 mL cm3

*

Question 2 - 30What is the simplest way to find the volume of a solid cube?

*

Answer 2 30 You measure the width, length, and height of the object. You then multiply these three measures.

*

Question 2 - 40Explain how to find the volume of an odd-shaped object.

*

Answer 2 40 Using a known volume of water in a graduated cylinder, place the odd-shaped object in the water. The amount of water the object displaces (the amount the water level rises) is the volume of the object.For instance, if the water level begins at 10mL, then an object is FULLY SUBMERGED in the water and raises the level to 15mL, the volume of the object is the difference between these two numbers: 15mL 10mL = 5mL

*

Question 2 - 50The volume of water in a graduated cylinder is 88mL. After a small object is placed in the cylinder, the volume increases to 100mL. What is the volume of the object? First give your answer in milliliters, then in cubic centimeters

*

Answer 2 50 100mL 88mL = 12mLThe volume of the object is 12mL or 12cm3

*

Question 3 - 10Define DENSITY.

*

Answer 3 10 Density describes the comparison between an objects mass and volume.The mass per volume.Mass/Volume (mass divided by volume)

*

Question 3 - 20What are the TWO possibilities of units for density and when should you use each one?

*

Answer 3 20 g/mL read as grams per milliliterUsed when measure the volume in a graduated cylinder or beaker.g/cm3 read as grams per centimeter cubedUsed when measuring the volume as length x width x height (as with a solid cube).

*

Question 3 - 30How does the density of 50mL of solid steel compare to the density of 100mL of solid steel?

*

Answer 3 30 The densities are the same.

*

Question 3 - 40A solid block of steel, and a steel boat both have a mass of 500 kg, in terms of volume and density, describe why one object sinks and the other one floats.

*

Answer 3 40 The solid block of steel is very compact and takes up very little space. Per unit of mass, it has a very small volume. The steel boat, on the other hand, takes up a large amount of space. Per unit of mass, it has a very large volume. Low density objects have a LARGE VOLUME for their mass (e.g. a boat), and have a density less than the surrounding fluid.

*

Question 3 - 505mL of oil floats on 5mL of water.5mL of corn syrup sinks to the bottom of a graduated cylinder, below the 5mL of water.These liquids all have the same volume, how do their masses compare? What is the relative density of these three solutions?Give your best guess regarding the actual densities of oil and corn syrup.

*

Answer 3 50 Corn syrup is the most massive and most dense.Water has a mass of 5g and is less dense than corn syrup, but more dense than oil.Oil is the least massive and least dense.Water has a density of 1g/mL. Oil has a density less than 1g/mL. Corn syrup has a density of more than 1g/mL.

*

Question 4 - 10Find the volume of a solid cube with a width of 4cm, length of 6cm, and height of 10cm. INCLUDE THE LABEL!

*

Answer 4 10 4cm x 6cm x 10cm = 240 cm3

*

Question 4 - 20A cylinder holds 50mL of water. What is the volume of a solid sphere (diameter 5cm), if when placed in the cylinder, the water level increases to 83mL?

*

Answer 4 20 83mL 50mL = 33mL

*

Question 4 - 30The density of air is 0.001 g/mL. What is the volume of 10 grams of air?

*

Answer 4 30 10g/v = 0.001g/mL10/0.001 = 10,000mLCHECK: 10g/10,000mL = 0.001g/mL

*

Question 4 - 40A cube has a side of 5cm. The mass of the cube is 250g. What is the density of the cube?

*

Answer 4 40 Volume = 5cm x 5cm x 5cm = 125cm3Mass = 250g250g/125cm3 = 2g/cm3

*

Question 4 - 50A graduated cylinder contains 100 ml of a liquid. The mass of the graduated cylinder with the liquid is 145 grams. The mass of the graduated cylinder when empty is 45 grams. What is the liquid?

*

Answer 4 50 WATER!The total mass is 145g. The mass of the cylinder is 45g. So you must subtract the mass of the cylinder to find the mass of the liquid. 145g 45g = 100g.The volume of the liquid is 100mL100g/100mL = 1g/mL (which we know as the density of water!)

*

Question 5 - 10Define CONSENSUS.

*

Answer 5 10 Agreement.

*

Question 5 - 20What is the value of consensus in science?

*

Answer 5 20 Scientific consensus requires scientists and student scientists to be as accurate and precise in measurements as possible, to try measurements multiple times, ensure tools/procedures are appropriate and careful, etc.To increase confidence in procedures and findings.

*

Question 5 - 30How is consensus different from democracy?

*

Answer 5 30 Scientists do NOT vote when reaching scientific consensus.Rather, they interpret data and resolve any discrepancies by trying measurements and procedures again or amending/improving their experimental design in some way.

*

Question 5 - 40Looking ahead:Using density to describe the phenomenon, how do hot air balloons float?

*

Answer 5 40 Heating up the air pushes the air particles farther and farther apart. The same mass of air exists in a larger volume. This lower the density, and the hot, less-dense air in the hot air balloon raises up above the more dense surrounding air.

*

Question 5 - 50Looking ahead:At the top of the highest mountain, how would you describe the density of the air? What effects might this have on the bodies of mountain climbers?

*

Answer 5 50 As we go higher in elevation, the air particles are much farther apart. This means we have a lower mass of air in a given volume. Therefore, the density of air is lower as we go higher in elevation.With air particles, including oxygen, more spread out, it is more difficult to breath at a higher elevation. Mountain climbers experience faster breathing rate and more difficult breathing.

*

Created by Educational Technology Network. www.edtechnetwork.com 2009*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*