The amount of matter (mass) in a given space (volume)

Slides:



Advertisements
Similar presentations
Density.
Advertisements

Density Why Do Some Things Float While Others Sink?
DENSITY.
How to Calculate Density
Measuring Matter 6 Beta Measuring Matter Which weighs more, a pound of feathers or a pound of sand? Which weighs more, a pound of feathers or a.
Chemical Building Blocks Lesson 2 Chapter 1 Measuring Matter.
Fluids Part 2 A look at mass, volume, weight, buoyancy and density
Density.
Density. Computing Density Density = mass (g) volume (cm 3 ) DETERMINE VOLUME: DETERMINE MASS: RT = Pg. 1.
Metric Measurement.
Density. Which do you think would have the greater mass? Greater volume? Why?  1 kg of feathers  1 kg of rock  Same mass!  Larger volume  Same mass!
DENSITY Q) Which weighs more:-
Chapter 9 Fluid Mechanics. Fluids “A nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid.”
Chapter 1: Introduction to Matter
Density Density describes how heavy an object is compared to its size.
PHYSICAL SCIENCE © Copyright All rights reserved.
Density.
+ Density Austin High School Chemistry Ms. Gutierrez
DENSITY. DEFNITION DENSITY: The mass of a substance per unit of volume In simple terms…How much “stuff” is in a certain amount of space Weight/amt of.
Density A lesson on integrity and science. Density is…. A periodic property How did Mendeleev know there was a missing element? He calculated the densities.
Which do you think would have the greater mass and greater volume? Why? 1 kg of rock 1 kg of feathers.
Learning Goals  Explain the meaning of mass and describe the units for measuring mass.  Distinguish between mass and weight.  Define volume and explain.
“The Density Equation” Mass (g) Volume (mL or cm 3 ) Density (g/mL or g/cm 3 )
DENSITY D = m/v (g/cm 3 ) Mass usually expressed in grams Volume usually expressed in cm 3 or ml etc.  Density = amount of matter per unit volume.
Density Sink or Float???.
Floating and Sinking.  Density is a measure of how closely packed the atoms in a substance are  Density is a physical property  All matter has measurable.
Properties of Matter Mass Volume Density.
Length Length - the distance from end to end of an object
Challenge 2 L. LaRosa for T. Trimpe 2008
Chemistry Chapter 4: What’s the Matter?. Concept Attainment Activity.
Density and Buoyancy Review 1-20 study notes. 1. Density =
Physical versus Chemical Properties Unit II - Part 1 The study of matter.
 A. Matter 1.Definition: anything that has mass and volume. 2. Characteristic properties (such as density, melting point, boiling point) can be used.
Matter Chapter Twelve: The Physical Properties of Matter 12.1 Density 12.2 Buoyancy 12.3 Properties of Materials.
What is Density?. Density is… The ratio of the MASS of a substance to it’s VOLUME.
Density is defined as mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object. Density is the amount of.
Mass, Volume and Density
DENSITY. There are three phases of matter: solid liquid gas.
Floating and Sinking Whatever floats your boat!. Warm-up 1. Observe the two beakers on the front table and record your observations. 2. Predict- will.
Chapter 5: Density and Buoyancy
UNIT THREE: Matter, Energy, and Earth  Chapter 8 Matter and Temperature  Chapter 9 Heat  Chapter 10 Properties of Matter  Chapter 11 Earth’s Atmosphere.
DENSITY Q) Which weighs more:- A kilogram of feathers or a kilogram of iron?
Properties of Matter Physical and Chemical Properties Mass and Volume Density.
Physical Properties p. 10 – 15
Mass, Volume, & Density.
(c) McGraw Hill Ryerson Fluids and Density A fluid is any form of matter that can flow.  Liquids and gases are fluids since they do not have.
Density SNC1D0.
4.1: Density Calculations
DENSITY Mark Place,
Unit 1 Mix and Flow of Matter
Introduction to Matter
Density What is density?
Properties of Fluids.
Activity #21 DENSITY.
Density Notes.
Properties of Fluids.
Class Notes: Buoyancy & Density
Mass, Volume & Density.
Properties of Matter.
A fluid is any form of matter that can flow.
Safety and Density.
THE AMOUNT OF MATTER IN A GIVEN VOLUME
The amount of matter (mass) in a given space (volume)
NOTES—WHAT IS DENSITY? Density is the amount of mass per unit of volume; it describes how much matter is packed into a space. Density is determined by.
DENSITY.
Whatever floats your boat!
What weighs more a ton of bricks or a ton of feathers?
A fluid is any form of matter that can flow.
A closer look at the physical property of Density
Presentation transcript:

The amount of matter (mass) in a given space (volume) Density The amount of matter (mass) in a given space (volume)

Solving for Density D = m/V Density = mass divided by volume If you have a glass of water with a mass of 500g (minus the glass), and the volume amounts to 500mL, what is the density of water? 500g/500mL = 1g/mL

Density is a useful physical property for identifying substances, because each substance has a unique density. The density of a substance is always the same at a given temperature and pressure. Except…. ???

Density of Liquid Liquid density units are g/ml or kg/L When different liquids combine, the densest liquids form layers on the bottom, less dense layers form at the top.

Water is the only non-metallic substance on Earth whose density in solid form (ice) is less than its density in liquid form. Why? Liquid water is most dense (1.00 g/mL) as a liquid and becomes less dense as the water molecules form crystals of ice as the temperature drops to 0 °C. This is due to hydrogen bonds forming between the water molecules, which line up molecules less efficiently (in terms of volume) when water is frozen. Hydrogen bonds are weak, constantly forming and breaking to create partially ordered structures in liquid water; in ice, each water molecule bonds rigidly to four others.

Density of Solids D = m/V Solid density units are g/cm3 or kg/m3 If you have a 1 kilogram of iron and a 1 kilogram of cotton, which would be less awkward to carry around? Since cotton is much less dense than iron, it would take up a lot more space, or volume. So it would be very awkward to carry a 1 kilogram of cotton (about 2.2 pounds). D = m/V Greater mass means greater density. Greater volume means less density.

A solid floats when it is less dense than the liquid that its in, and sinks when it is more dense. So wood is less dense than water and a rock is more dense. Ice will suspend in water, most of its mass will be below water, and about 8%) will be above the water. This is because its density (.92 g/cm3) is very close the density of liquid water (1.0 g/mL)

Buoyancy The upward force that a fluid exerts on an object less dense than itself. ~ Drews 2008

Measuring mass The amount of matter in an object. Use an electric balance to determine mass For solids use g, or kg For liquids, use the same method and units but remember to subtract the mass of the container from the total mass to find the mass of the liquid only. Example: 200g total mass – 40g beaker = 160g of liquid

Measuring Volume The amount of space occupied by a 3 dimensional object. Volume of regular shaped solids can be determined using simple equations like = L x W x H For volume of a liquid, use graduated cylander. For irregular shaped solids, use the water displacement method. For solids, use cm3 or m3 For liquids, use mL or L Conversion: 1 cm3 solid = 1 mL liquid

Density Calculation Practice What is the density of an object whose mass is 23.5 g and whose volume is 10 cm3? D = m/V D = 23.5g/10cm3 D = 2.35 g/cm3 Does the object float?