Your SlideShare is downloading. ×
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
8th Grade Chapter 4 Lesson 1
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

8th Grade Chapter 4 Lesson 1


Published on

For Student Use Only

For Student Use Only

Published in: Technology, Business
  • Be the first to comment

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide


  • 1. Pgs. 138-144 For Student Use Only
  • 2.
    • Fluids:
      • NOTE:
        • Water and Air are fluids
        • Fluid means flowing.
        • They pass freely from one place to another
        • Fluids are different than solids because they can flow
  • 3.
    • Characteristics:
      • Liquids- definite volume, but NO definite shape
        • Fit into a container but will NOT expand to fill it
      • Gases- NO definite volume, NO definite shape
        • Will expand to fill a container and take shape of container
  • 4.
    • John Dalton
      • Built upon Greek knowledge and said that all matter is made up of particles called atoms that combine to make molecules
        • All matter is made up atoms that can combine
  • 5.
    • Daniel Bernoulli:
      • Helped build foundation of our understanding of molecules
        • KTM= The molecules of matter are in constant motion
      • Molecules in:
        • Solids= vibrate without much movement
        • Liquids= move randomly
        • Gas= move farther and faster
  • 6.
  • 7.
    • Mixing of Molecules:
      • Diffusion= the mixing of molecules of one kind with molecules of another kind
      • Diffusion occurs in liquids and in gasses
      • Diffusion occurs because particles run into each other
  • 8.
    • Molecules Stick Together:
      • Cohesion= the ability of molecules of the SAME kind to stick together
      • Adhesion= the ability of different kinds of molecules to stick together
        • Identify:
          • Water sticking to water
          • Corn syrup sticking to plate
          • Dog hair sticking to your clothes
  • 9.
    • Water’s Cohesion:
      • Water molecules are attracted to each other
      • Water molecules on the surface are attracted to the molecules on the side or underneath
      • This creates a “film” on top of water.
      • SURFACE TENSION= tendency of liquid to act as if it has a thin film on top
  • 10.
  • 11.
    • Surface Tension
      • Causes particles to form spheres (bead up)
        • Gravity turn spheres into mounds
      • Can allow objects more dense than water to float
      • Forms a meniscus
        • Meniscus= where the water rises on the glass
  • 12.
    • Working Together:
      • The meniscus forms because the adhesion (glass to water) is stronger than the cohesion (water to water)
      • When a liquid in a thin tube falls above or below normal level
        • Water is pulled up a small glass tube by adhesion
        • Mercury is not as attracted to glass and is more attracted to itself
  • 13.
    • Comparing Density:
      • How do you calculate density?
        • Density= mass/ volume
          • Grams/mL
      • Densities of many objects can be compared
      • Densities are usually compared to water
  • 14.
    • Specific Gravity:
        • Specific Gravity= a number that compares the density of an object with that of water.
          • In other words= zinc has a specific gravity of 7 and is 7 times as dense as water
        • Specific Gravity= Density of object/ Density of water
  • 15.
    • Pressure:
      • Pressure= the force exerted per unit of area
        • Water Pressure= the pressure water exerts on you
      • Pressure= Force/ Area or P=F/A
        • PSI= Pounds per Square Inch
      • The air weighs only a little, but exerts much pressure
  • 16.
    • Compression Pressure:
      • A fluids’ container can cause pressure changes
      • Pressure is spread out evenly
      • Pressure is caused by the squeezing of a fluid into a container
    • Depth and Pressure
      • Gravitational Pressure can cause changes as depth increases (more pressure)
        • Gravity pulls down on objects
        • NOTE: gravitational pressure in fluids is spread evenly in all directions