General Science | Density. Sometime around 250 BCE, the Greek mathematician Archimedes was given the task of determining whether a craftsman had defrauded the King of Syracuse by replacing some of the gold in the King's crown with silver. Archimedes thought about the problem while relaxing in a bathing pool. As he entered the pool, he noticed that water spilled over the sides of the pool. Archimedes had a moment of epiphany. He realized that the amount of water that spilled was equal in volume to the space that his body occupied.
This fact suddenly provided him with a method for differentiating a mixed silver and gold crown from a pure gold crown. To top What is density? Archimedes had used the concept of density to expose the fraud. For example, how could you distinguish a metric ton of feathers versus a metric ton of bricks, shown in Figure 1, if you could not see them? Figure 1: Bricks and feathers. One metric ton of either feathers or bricks will have an identical mass of 1,000 kilograms (one metric ton). Learning resources gallery, page 1. Density. Density Tower - Magic with Science. Start your column by pouring the honey into the cylinder. Now, you will pour each liquid SLOWLY into the container, one at a time. It is very important to pour the liquids slowly and into the center of the cylinder. Make sure that the liquids do not touch the sides of the cylinder while you are pouring.
It’s okay if the liquids mix a little as you are pouring. The layers will always even themselves out because of the varying densities. Make sure you pour the liquids in the following order: Honey Corn syrup Maple syrup Milk Dish soap Water Vegetable oil Rubbing alcohol Lamp oil After letting the liquid layers settle, you'll notice that they remain in the order you poured them into the cylinder and that they are clearly distinguishable from each other. What scientific principle do you think contributes to the column's layers? The same amount of two different liquids will have different weights because they have different masses. Why do you think these two phenomena happen?
Seven Layer Density Column. Measure 8 ounces of each type of liquid into the 9 ounce portion cups. You may want to color each of the liquids to make a more dramatic effect in your column. Light Karo syrup is easier to color than dark syrup. The only liquids that you may not be able to color are the vegetable oil and the honey. Start your column by pouring the honey into the cylinder. Now, you will pour each liquid SLOWLY into the container, one at a time. The same amount of two different liquids will have different weights because they have different masses. To test this, you might want to set up a scale and measure each of the liquids that you poured into your column. ** NOTE: The numbers in the table are based on data from manufacturers for each item. The table shows the densities of the liquids used in the column as well as other common liquids (measured in g/cm3 or g/mL).
Density is basically how much "stuff" is smashed into a particular area... or a comparison between an object's mass and volume. Lesson Plans. Chapter 1: Matter—Solids, Liquids, and Gases Students are introduced to the idea that matter is composed of atoms and molecules that are attracted to each other and in constant motion. Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas. Chapter 2: Changes of State Students help design experiments to test whether the temperature of water affects the rate of evaporation and whether the temperature of water vapor affects the rate of condensation. Students also look in more detail at the water molecule to help explain the state changes of water.
Chapter 3: Density Students experiment with objects that have the same volume but different mass and other objects that have the same mass but different volume to develop a meaning of density. Chapter 4: The Periodic Table & Bonding Chapter 5: The Water Molecule and Dissolving Chapter 6: Chemical Change Project Based Lessons. Density - Density, Mass, Volume. Soda Can Density Discrepancy.