Slideshow Transcript

1. Slide 1: Vo lum e , Mass, W e ight A short review!
2. Slide 2: Mass: The amount of matter an object has. Matter: Anything that has mass and takes up space (liquid, gas, solid).
3. Slide 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. Slide 4: More on Mass • Make sure you “zero the balance”! St ar t he re • What is the mass of the object on the balance? • Start with the biggest weight and work toward the smallest.
5. Slide 5: Weight: The pull of gravity on an object. Remember…gravity changes throughout our solar system
6. Slide 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. Slide 7: Volume: The amount of space an object takes up or contains.
8. Slide 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. Slide 9: Volume of Solids • Commonly measured in meters cubed (m3) or centimeters cubed (cm3). • Measured by L*W*H (cm3). • Irregular solids can be measured in graduated cylinder.
10. Slide 10: Helpful Hints… • mL = cm3 • So, if a solid displaces 2 mL of water in a graduated cylinder then its volume is 2 cm3. • Measure on the Metric side of the ruler!
11. Slide 11: new day = new ideas
12. Slide 12: Observe the four bottles and their contents. 1. What is the same about each bottle? 2. What is different about each bottle? 3. What do you observe about their volume? 4. What do you observe about their mass? 5. Put bottles in order from the most dense to the least dense.
13. Slide 13: THE MOST DENSE #3 (rocks) #1 (water) #4 (cotton) #2 (air) THE LEAST DENSE
14. Slide 14: What is the density of your fridge?
15. Slide 15: Density=Mass/Volume
16. Slide 16: Where are there the most people? Where is the population most dense?
17. Slide 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/ cm3 (the amount of mass in a unit of space) How to Measure: Find Mass, Find Volume, Divide M/V, Units.
18. Slide 18: Density! • Mass of cotton bottle (103g) • Volume of cotton bottle (2L or 2000mL) • mL = cm3 (2000 cm3) • Density = 103g/2000 cm3 • Density = 0.05 g/ cm3
19. Slide 19: FLOATING SINKING ROCK ROCK