1 / 16

Volume and Density Concepts

Learn about volume and density in this lesson. Explore how to measure volume using graduated cylinders and water displacement. Understand the concept of density and why objects float or sink in different liquids.

sophial
Download Presentation

Volume and Density Concepts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reminders: Turn in Safety Contracts Metric Mania-day 2 8 September 4 Warm - Up: volume, density Today’s Agenda: 1. collect HW 2. Notes: Volume & Density HW: WS: Finding Volume

  2. 9. volume the amount of space an object takes up Draw it: Connect it: displacement method 270 ml - 200 ml = 70 ml

  3. 10. density is the mass of the object divided by its volume Draw it: Connect it: sink or float?

  4. Volume T. Trimpe 2008 http://sciencespot.net/

  5. Metric Units kL cL mL L Volume is the amount of space an object takes up. The base unit of volume in the metric system in theliter and is represented by L or l.

  6. Metric Units kL cL mL L Metric Units 1 liter (L) = 1000 milliliters (mL) 1 milliliter (mL) = 1 cm3 (or cc) = 1 gram* Which is larger? A. 1 liter or 1500 milliliters B. 200 milliliters or 1.2 liters C. 12 cm3 or 1.2 milliliters*

  7. Measuring Volume We will be using graduated cylinders to find the volume of liquids and other objects. Read the measurement based on the bottom of the meniscus or curve. When using a real cylinder, make sure you are eye-level with the level of the water. What is the volume of water in the cylinder? 43 mL

  8. Measuring Volume What causes the meniscus? A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides. Top Image: http://www.tea.state.tx.us/student.assessment/resources/online/2006/grade8/science/images/20graphicaa.gifBottom Image: http://morrisonlabs.com/meniscus.htm

  9. Measuring Liquid Volume What is the volume of water in each cylinder? Images created at http://www.standards.dfes.gov.uk/primaryframework/downloads/SWF/measuring_cylinder.swf A B C Pay attention to the scales for each cylinder.

  10. Measuring Volume of a Solid 9 cm 8 cm 10 cm We can measure the volume of regular object using the formula length x width x height. 10 cm x 8 cm x 9 cm = 720 cm3

  11. Measuring Volume of Irregular Object Amount of H2O with object = 270 ml - Amount of H2O without object = 200 ml Volume of object = 70 ml We can measure the volume of irregular object using water displacement.

  12. Density

  13. Density Density of water is 1 g/ml or 1g/cm3 (memorize this value) Density is the mass per unit volume. A measure of how tightly packed matter is. It is a physical property of a substance. Density = mass / volume

  14. Why Objects Float/Sink: ­ NOTbecause they are "Light", or "Heavy" ­ because they are more dense (sink), or less dense (float) then the liquid they are in. Pure Water Density: 1.0 g/ml Wood Density: ~ 0.7 g/cm3 Iron Density: ~ 7.9 g/cm3 Note: ­ Object that is MORE dense than the liquid SINKS ­ Object that is LESS dense than the liquid FLOATS

  15. ­ Sinking and floating does not have to do with only wood and iron ­ Liquids sink and float also in other liquids Olive Oil Density: 0.9 g/ml All the delicious things that make up Italian dressing Density: More than 0.9 g/ml, sink to the bottom

  16. WS: Finding Volume Volume ball = 100 - 80 = 20 ml

More Related