Calculating Density with Water Displacement

What is the method used to find the volume of an irregular shaped object?

• water displacement

• density

• mass

• weight

What is the volume of the two red spheres? (Hint: new volume - old volume)

• 4 cc

• 6 cc

• 2 cc

• 8 cc

What is the volume of the water in the empty graduated cylinder?

• 4 mL

• 65 mL

• 69 mL

• 71 mL

The picture shows the displacement method being used to determine the volume of a 12 gram piece of iron. What is the density?

• 4 g/cm³

• 48 g/cm³

• 7 g/mL

• 5 g/mL

What is the density of this unknown mineral?

• 19.2 g/cm³

• 2.6 g/cm³

• 3.0 g/cm³

• 49.1 g/cm³

Pennies minted prior to 1982 were made of copper, which has a density of 8.96 g/cm³. After 1982, pennies were made of mostly zinc metal, which has a density of 7.13 g/cm³. Which of the following methods would be useful when trying to determine the density of a penny?

• Use the formula L x W x H

• place it on a triple beam balance to determine its volume, then a ruler to measure height.

• use the displacement method to determine volume and a triple beam balance to measure the mass

• use the periodic table and a calculator to multiply the atomic mass of zinc and copper

A student has a clear block of an unknown substance and needs to determine the identity of the substance. The mass of the block is 9 grams. The block has a length of 2 cm, a width of 4 cm, and a height of 1 cm. The block floats when dropped in a beaker of water. What is the identity of the substance?

• lucite

• polyethylene

• glass

• quartz

Tags

NGSS.MS-PS1-2

Silver-colored jewelry can be made from many different metals. A jeweler purchased a ring, but is unsure of the ring's composition. The jeweler measured the mass as 15 grams and the volume as 3.3 cm³. What is the ring most likely made of?

• sterling silver

• platinum

• white gold

• titanium

An unknown substance has a mass of 26 grams and a volume of 13 mL. When placed in water, this substance can be expected to -

• float, because it's less dense than water

• sink because it's more dense than water

• sink because it's less dense that water

• float because it's more dense that water

What is the principle behind using water displacement to measure the volume of an object?

• Archimedes' principle

• Newton's first law

• Pascal's law

• Bernoulli's principle