Your SlideShare is downloading. ×
Matter
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

Matter

5,326
views

Published on

Published in: Technology

2 Comments
5 Likes
Statistics
Notes
  • THere are a number of inaccuracies in this presentation, corrections below:
    The amount of gravitational attraction between two objects depends on their mass (not weight)
    Odor is not a physical property.
    Solubility is not a physical property - it is a chemical property (despite the many webistes that say it's a physical property - check the higher level chemistry sites)
    Some chemical properties can be determined with our senses: taste and smell.
    Not all physical properties can be observed with one's eyes.
    Physical changes are not always easy to undo (e.g., teariing a piece of paper changes the shape; dissolving two salts together - not easy to separate).
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • I like it
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
5,326
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
0
Comments
2
Likes
5
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Chapter 2 The Properties of Matter What is matter? Which part of this course is more concerned with matter?
  • 2. Matter
    • Everything is made of MATTER!
    • Matter is anything that has volume and mass.
    • Volume is the amount of space an object takes up, or occupies.
  • 3. Measuring the volume of liquids
    • Liquids have volume. We measure that volume with a graduated cylinder.
    • Notice the meniscus in the graduated cylinder.
    • Always measure at the bottom of the meniscus!
    • A liquid in any container has a meniscus.
    • Liters (L) and mL (milliliters) are most often used to express the volume of liquids.
  • 4. Solid Volume
    • The volume in a solid is always expressed in cubic units.
    • Cubic means having “three dimensions.”
    • Cubic meters(m 3 ) or cubic centimeters(cm 3 ) are most often used to express the volume of a solid.
    • The 3 in m 3 signifies that three quantities were used to get the final result. (That is a derived quantity!)
    • If each side in the cube below is 2m, what is the volume of the cube?
    • __________
  • 5. The Volume of Solids, Liquids, and Gases
    • 1 mL = 1 cm 3 REMEMBER THAT!
    • That is why you can compare the volume in liquids to solids.
    • How do you measure the volume of a gas?
    • You can’t see, so how do you measure it?
    • ex: balloon
    • _________________________
  • 6. Matter and Mass
    • What is mass?
    • Mass is the amount of matter that something is made of.
    • Even atoms have mass!
    • Looking at the picture…
    • The mass stays constant in certain forms of matter such as…__________________.
    • The mass changes in certain forms of matter such as…_________________.
  • 7. What is the difference between mass and weight?
    • This is an important concept to understand!
    • Let’s start by understanding gravity.
    • Gravity is the force of attraction between objects that is due to their masses.
    • All matter experiences gravity!
    • The amount of attraction between two objects depends on their weight.
    • There is attraction between all objects with mass, but since they are so small in reference to the earth, the attraction between them is also small.
  • 8. So, what about weight?
    • Weight is the measure of the gravitational force exerted on an object!
    • Look at Spot and the rock…which one is attracted to the earth more through gravitational force? ________________
    • Which one weighs more? ___________
    • So, this means the greater the gravitational force, the greater the weight.
    • Which weighs
    • more? ------->
  • 9. Measuring Weight and Mass
    • The SI unit for mass is kilogram (kg).
    • Sometimes we will use milligrams or grams. (mg or g)
    • The SI unit for weight (or gravitational force) is NEWTONS.
    • A Newton is approximately equal to the weight of a 100 gram mass on earth.
  • 10. The major differences between
    • MASS
    • A measure of the amount of matter in object.
    • Always constant, no matter the location.
    • Measured with a balance.
    • Expressed in kilograms, grams, and milligrams.
    • WEIGHT
    • A measure of the gravitational force on an object.
    • Varies depending on where the object is in relation to the earth. Example: ____________
    • Measured with a spring scale.
    • Expressed in Newtons.
  • 11. Mass is a measure of Inertia
    • What in the world is inertia?
    • Ever try to move a car? Yeah, it is difficult!
    • That is because of inertia!
    • Inertia is the tendency of all object to resist a change in motion.
    • This will cause objects that are still to remain still, and allow objects that are moving to continue moving.
    • Mass is a measure of inertia because the greater the mass of an object…the more difficult it is to move.
  • 12. Describing Matter
    • Knowing the characteristics or properties of an object can help you identify the object.
    • There are:
      • Physical Properties
      • Chemical Properties
  • 13. Physical Properties
    • Things that describe the object are physical properties.
    • Physical properties can also be observed or measured without changing the identity of the matter.
    • Examples of physical properties include: color, odor, size, state, density, solubility, melting point, etc…
  • 14. Spotlight on Density
    • Density is a very helpful physical property.
    • Density = mass per unit of volume or Density = mass/volume
    • Density is an excellent help in identifying substances because each substance has its own density.
  • 15. If Density = mass/volume
    • Then mass = volume x density
    • or
    • m = v x d
    • AND volume = mass/density
    • or
    • volume = m
    • V
  • 16. Chemical Properties
    • Chemical properties describe a substance based on its ability to change into a new substance with different properties.
    • Ex: wood burns to form ash and smoke
    • Chemical properties cannot be observed with your senses.
    • Chemical properties aren’t as easy to observe as physical properties.
    • Examples of chemical properties: flammability and reactivity
  • 17. Characteristic Properties
    • The properties that are most useful in identifying a substance are its characteristic properties.
    • Remember the difference between physical and chemical properties.
    • Physical properties can be observed! (with your eyes!) IDENTITY OF SUBSTANCE DOES NOT CHANGE!
    • You can observe chemical properties only in situations in which the identity of the substance could change.
  • 18. Physical Changes
    • A physical change is a change that affects one or more physical properties of a substance.
    • Physical changes do not form new substances! EX: ice melting or sugar dissolving
    • Physical changes are easy to undo.
  • 19. Chemical Changes
    • A chemical change occurs when one or more substances are changed into entirely new substances with different properties.
    • You can observe chemical properties only when a chemical change might occur!
    • Examples of chem. changes:
    • baking a cake
    • rusting
  • 20. Clues to chemical changes
    • Color change
    • Fizzing or bubbling (gas production)
    • Heat
    • Production of light, sound, or odor.
    • Chemical changes are not usually reversible!
  • 21. For tomorrow…
    • Please re-read Phyz talk
    • Be prepared to begin stations.
    • Know that I am going to do a binder check this week!