 Dry ice is frozen Carbon Dioxide, or CO 2, which is a gas under standard temperature and pressure conditions. The atmosphere contains about.035% of.

Slides:

Advertisements

Similar presentations

HOW DO FORMS OF WATER CHANGE? Lesson 2 Learning Goal: You will understand how water changes form and apply what you know about the water cycle.

Advertisements

Kinetic Energy and Phase Changes. Diffusion Diffusion is the process by which molecules will move randomly in order to fill the space that they are in.

SASS workshop Conference for School Support Staff Workshop for Science Assistants.

7.2 Water, Steam, and Ice Phases of matter. Why is cooking with steam better than 100 C hot air? Why do foods get freezer burn? Why does the freezer get.

PHASE CHANGES SECTION 3.3.

Dry Ice Lab. Warnings and precautions Dry ice is very cold (-78.5 o C, or o F) No direct contact with skin (use tongs, paper towels, gloves etc…

Foundations of Chemistry Matter Chapter 7 Lesson 3 Physical Changes

Liquid Carbon Dioxide Solid carbon dioxide is converted to liquid which quickly converts to gas.

Dry Ice Lab Kinetic theory and Phase Changes. Warning! Dry Ice, if kept in confined areas, may cause an explosive rupture of its container.

Phase Changes Chp 10. Phase Diagrams Phase diagram = relates physical states of matter (solid, liquid, gas) to temperature and pressure.

Changes of State Section 18.3.

Phase Changes Melting Vaporization Condensation Freezing Sublimation.

PHASE CHANGES Matter can change from one state to another. This is known as a Phase Change. All Phase Changes are Physical Changes… The Identity of the.

Changes in States of Matter Involving Carbon Dioxide 8 th Grade Vanderbilt Student Volunteers for Science Training Presentation Fall 2013.

 The Inner Planets Chapter 20 Section 3.  The Inner Planets are the 4 planets closest to the Sun  Mercury, Venus, Earth, and Mars  The Inner Planets.

The Inner Planets  The inner planets are the 4 planets closest to the sun:  Mercury  Venus  Earth  Mars  The four inner planets are small and dense.

Absolute zero is the lowest temperature possible. At a temperature of absolute zero there is no motion and no heat. Absolute zero occurs at a temperature.

3.3 Phase Changes A large iceberg contains enough fresh water to supply millions of people with water for a year. As it moves into warmer areas, the ice.

Part I The Sun is a star located in the center of our Solar System. The Sun is a huge sphere composed of super-heated gases (plasma). The Sun’s gravitational.

R21 Global Warming & Greenhouse Effect Prior Knowledge: What do you know about Greenhouse Effect and Global Warming?

Matter. Review States of Matter Solid Liquid Gas Plasma.

What happens to substances when they change states of mater?

Heat Energy and Changes of State. Matter may exist as a solid, liquid, or a gas.

Phase Changes  Recall that matter exists in 3 states or phases: Solid, Liquid, and Gas  A phase change occurs when there is a change in temperature of.

Phase Change Dec 3 rd. A Change of State Matter can change from one state to another The attraction between molecules and their rate of movement are two.

Water In The Atmosphere The presence of water in the atmosphere is a major influence on the formation of clouds, rain, snow, lightning, fog, and most other.

Atmospheric Properties II Martin Visbeck DEES, Lamont-Doherty Earth Observatory

The Greenhouse Effect A large majority of the insolation that is radiated back into the atmosphere gets absorbed by greenhouse gases. A large majority.

Feedback Loops. FEEDBACK LOOPS Change induces change What happens when you’re hot? What happens when you’re cold? These are examples of negative feedback.

States of Matter and Phase Change. Phase Change Diagram.

The Greenhouse Effect What is the greenhouse effect? Interaction between planet’s atmosphere, star’s light Results in heating of planet What causes the.

Riddles 1. What has 4 eyes but can’t see?

SECTION 2: CHANGES OF STATE Chapter 2: Solids, Liquids, and Gases.

Physical Science Mr. Moss RHS.  When 2 states are present at the same time, we describe each as a phase.  Here, we see 2 phases of water: ◦ Solid Phase.

States of Matter! Molecules are vibrating. Molecules are moving faster. Definite volume No definite shape Definite volume Definite shape From CPO focus.

State Changes How matter changes forms. What is energy?  Energy is the ability to do work or cause change.

State Changes How matter changes forms Physical Science.

 A change of state is the conversion of a substance from one state to another  All changes of state are physical changes  The identity of a substance.

◦ A change in state from a solid to a liquid occurring at a specific temperature.

Dry Ice Lab Purpose: Observe changes in state from solid to gas.

Dry Ice Background Dry ice is carbon dioxide in its solid state. Remember…dry ice sublimates instead of melting. Carbon dioxide is found in the earth's.

Mad Science MR. NEMECEK | WINTER 2015 | GASEOUS ANOMALIES.

Water in the Air It’s always there. Water is ALWAYS in the Air! It can be in the air as a solid, a liquid or a gas. Solid- Ice Liquid- Water Gas- Water.

I. Phase Changes Matter and Energy Section 2.2. Phase Changes Gas Solid Liquid Amount of heat.

States of Matter Phase Change. Water Water exists on our planet in three states. Ice, water, and water vapor What causes water to be in one phase or another?

States of Matter. 2.1 Three States of Matter ________________- These are physical forms in which a substance can exist. Let’s use water as an example.

Chp Phase Changes Pg Characteristics of Phase Changes  When at least two states of a substance are present, each state is described as.

Changes of State Chapter 3 Section 2. Changing State By removing or adding energy, a substance can lose or absorb energy, its temperature can change,

Changes of State Chapter 4-2. Changes of State A change of state is the conversion of a substance from one physical form to another. All the changes are.

Energy in the Atmosphere

Water in the Atmosphere. States of Matter Water vapor – gaseous form (0 to 4% by volume) Water – rain, dew, clouds, fog Ice – snow, hail, clouds.

CHAPTER 2: MATTER. CHANGES OF STATE When matter changes from one state to another, we call this a phase change Thermal energy is related to the microscopic.

Section 3.3 Phase Changes.

Changes of State January 5, th grade Chapter 4.2.

03 States of CO2 (Dry Ice) Science By the Horns Summer 2004.

WATER IN THE ATMOSPHERE Honors Earth science Chapter 16.

Water in the Atmosphere Chapter 18, Section 1. Water in the Atmosphere  Precipitation – any form of water that falls from a cloud  When it comes to.

Fill in the Chart MoleculesDefinite Shape ?Definite Volume? Solid Liquid Gas.

The Water in the Air. First, let’s name the three states of matter. Solid Liquid Gas When we think of water, of what state of matter do we usually think?

$1 Million $500,000 $250,000 $125,000 $64,000 $32,000 $16,000 $8,000 $4,000 $2,000 $1,000 $500 $300 $200 $100 Welcome.

© 2010 Pearson Education, Inc. Unit 2: Heat Change of Phase.

What is a Phase diagram? Phase diagram: plot of pressure vs. Temperature summarizing all equilibria between phases. Given a temperature and pressure, phase.

Cloud formation and Atmospheric CO2. Cloud Formation There are a few ways clouds form 1.Rising Hot Air 2.Warm air over a cold body of water 3.On Mountainsides.

Phase Changes Physical Science

The greenhouse effect. How is the Earth warmed? Climate is affected by the conditions and components of the atmosphere. The Earth’s atmosphere acts like.

How Cold Is Cold? I Bet It’s Colder Than You Think.

Energy and Matter Changes in State Chapter 8 Lesson 2 Mr. Nigh Science 7.

Atmospheric Heating.

Solids Liquids Gases PHASES OF MATTER

Presentation transcript:

 Dry ice is frozen Carbon Dioxide, or CO 2, which is a gas under standard temperature and pressure conditions. The atmosphere contains about.035% of this gas. CO 2 is a greenhouse gas, which means it absorbs light at infrared wavelengths.  An increase in the concentration of this gas would, some scientists believe, cause an increase in the atmosphere's average temperature. The high concentration of CO 2 in the atmosphere of the planet Venus is said to contribute to that planet's high average temperature.

 At normal atmospheric pressure on this planet, frozen CO 2 doesn't melt into a liquid, but rather evaporates directly into its gaseous form. Hence the name dry ice. This process is called sublimation.  1 pound of dry ice, when it "sublimes" (turns to gas) will produce 250 liters of gas at atmospheric pressure, enough to fill liter bottles. That's a lot of gas!

 Dry ice is commonly available from ice dealers in two forms: flat square slabs a few inches thick and about eight inches on a side; or cylinders about half an inch in diameter and from a half to 2 ½ inches long. The price for ten pounds is around six dollars. If you buy less than this you will pay about a dollar per pound.

 Due to its extremely cold temperature (-78.5 o C, or o F), dry ice can cause damage to the skin if handled. Use tongs or insulating gloves when handling dry ice. It is also important when crushing or grinding the solid not to get any of the dust into your eyes. Wear protective goggles.

 When you place dry ice into some warm or hot water, clouds of white fog are created. This white fog is not the CO 2 gas, but rather it is condensed water vapor, mixed in with the invisible CO 2. The extreme cold causes the water vapor to condense into clouds.  Do not allow anyone to lay down in this fog, or allow babies or pets into it, as CO 2 gas does not support life.

 This is the demonstration that we are going to do today in Mrs. Farner’s lab.  Search “Steve Spangler Science” on a search engine to find more dry ice experiments. Remember to heed all previous safety precautions.