The document discusses volume, mass, weight, and density. It defines mass as the amount of matter in an object, volume as the space an object takes up, and weight as the force of gravity on an object. It explains that density is calculated by dividing an object's mass by its volume and discusses measuring and comparing the densities of different materials.

1. Volume, Mass, Weight A short review!

2. Mass: The amount of matter an object has. Matter: Anything that has mass and takes up space (liquid, gas, solid).

3. Mass Units: Kilograms (kg) or grams (g). Mass is generally measured in science type places using a a triple beam balance! Mass is constant and only changes with diets and such.

4. More on Mass Make sure you “zero the balance”! What is the mass of the object on the balance? Start with the biggest weight and work toward the smallest. Start here

5. Weight: The pull of gravity on an object. Remember…gravity changes throughout our solar system

6. Heavy, Dude Gravity acts on mass! W = m * G Weight = mass * gravity The force by which a planet or other such body tends to draw objects toward its center.

7. Volume: The amount of space an object takes up or contains.

8. Volume of Liquids Commonly measured in Liters (L) or Milliliters (mL). Measured using a graduated cylinder. Remember …get eye level and measure from the bottom of the meniscus.

9. Volume of Solids Commonly measured in meters cubed (m 3 ) or centimeters cubed (cm 3 ). Measured by L*W*H (cm 3 ). Irregular solids can be measured in graduated cylinder.

10. Helpful Hints… mL = cm 3 So, if a solid displaces 2 mL of water in a graduated cylinder then its volume is 2 cm 3 . Measure on the Metric side of the ruler!

11. new day = new ideas

12. Observe the four bottles and their contents. What is the same about each bottle? What is different about each bottle? What do you observe about their volume? What do you observe about their mass? Put bottles in order from the most dense to the least dense.

13. #3 (rocks) #1 (water) #4 (cotton) #2 (air) THE MOST DENSE THE LEAST DENSE

14. What is the density of your fridge?

15. Density=Mass/Volume

16. Where are there the most people? Where is the population most dense?

17. What is density? Definition: the mass of a substance per unit volume how many particles there are in a certain amount of space. Units: g/ cm 3 (the amount of mass in a unit of space) How to Measure: Find Mass, Find Volume, Divide M/V, Units.

18. Density! Mass of cotton bottle (103g) Volume of cotton bottle (2L or 2000mL) mL = cm 3 (2000 cm 3 ) Density = 103g/2000 cm 3 Density = 0.05 g/ cm 3

19. FLOATING ROCK SINKING ROCK