[PDF] Three states of matter - The University of Western Australia PDF

States of Matter - NASA

Gas: The state of matter without a set shape or volume Liquid: The state of matter with a set volume but no set shape Solid: The state of matter with a set volume and a set shape • Give an example of each of the three states of matter that was not discussed in class Answers will vary Example: Water is liquid Ice is solid Water vapor is

State of matter - Wikipedia

States in the executive, legislative, or judicial branch of the Government, or in any agency of the United States, in relation to any proceeding, application, request for a ruling or other determination, contract, claim, controversy, charge, accusation, arrest, or other particular matter in which the United States is a party or has a direct and

Matter of Y-G- - United States Department of Justice

Aug 14, 2012 · I&N Dec 409 (BIA 1991); Matter of Shirdel, 19 I&N Dec 33 (BIA 1984); Matter of L-L•, 9 I&N Dec 324 (BIA 1961) The record contains no evidence that the applicant practiced fraud or made a willful misrepresentation to a United States Government official in procuring or in seeking to procure documentation Accordingly, we

Matter of I- Corp, Adopted Decision 2017-02 (AAO Apr 12, 2017)

Apr 12, 2017 · knowledge” to work temporarily in the United States The Director of the California Service Center denied the petition, concluding that the evidence did not demonstrate that the Beneficiary possesses specialized knowledge or that he has been and will be employed in a capacity requiring specialized knowledge The matter is now before us on appeal

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steps to avoid an appearance of loss of impartiality in the performance of his official duties Under §2635 502, unless he receives prior authorization, an employee should not participate in a particular matter involving specific parties which he knows is likely to affect the financial interests of a member of his

[PDF] Three states of matter - The University of Western Australia

There are three states of matter: solid; liquid and gas They have different properties, which can be explained by looking at the arrangement of their particles

[PDF] STATES OF MATTER - NCERT

explain the existence of different states of matter in terms of balance between intermolecular forces and thermal energy of particles; • explain the laws governing

[PDF] States of Matter - ThaiScience

There are three basic states of matter that can be identified: solid, liquid, and gas Solids, being compact with very restricted movement, have definite shapes and

[PDF] States of Matter - Museum of Science, Boston

States of Matter is a 60- minute presentation about the characteristics of solids, liquids, gases, and the temperature- dependent transitions between them It is

[PDF] Meet Today's ENG HERO Learning Goal: • Materials Needed:

Students will explore and discuss the states of matter Let's imagine that you have been asked to design the official Canadian Olympic team's warm-up suits

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[PDF] Three states of matter - The University of Western Australia

196784_8Three_states_of_matter.pdf

ast0778 | Soft drink science 3: Three states of matter (background sheet) developed for the Department of Education WA

Solids contain particles arranged

in a lattice structure. The particles vibrate in their fixed positions.

This explains properties of solids:

They can't be compressed

(particles are already tightly packed together).

They keep their shape and have

a constant volume when they change container (particles are in

fixed positions).Liquids contain particles that roll around each other and settle on the bottom of their container. The particles are generally slightly further apart than in a solid. (Water is an exception - ice particles are slightly further apart than liquid water, which is why ice floats.)

This explains properties of liquids:

They change shape when poured

into a different container (particles roll over each other and settle on the bottom). They have constant volume (particles are close together).

They are slightly compressible.

(There are slight spaces between

particles.)Gases contain particles that move around very quickly. The particles travel in straight lines until they bounce off another particle or a surface. Gas particles are widely spaced and tend to be only slightly attracted to each other.

This explains properties of a gas:

They fill available space (slight

attraction between particles).

They are very compressible (particles are widely spaced).There are three states of matter: solid; liquid and gas. They have different properties, which can be explained by looking at the arrangement of their particles.

Three states of matter

Absolute zero

This is the theoretical temperature at which particles have the least amount of energy and the slowest movement. It occurs at -273.15 °C, or 0 Kelvin on the scientific temperature scale. Scientists have not been able to cool down any substance to this temperature but have come very close. It used to be thought that particles would stop moving at absolute zero but experiments have shown that this isn't the case.

Particles in motion

All particles are constantly in motion. This is called the kinetic theory of matter. When energy is added to particles (in the form of heat energy for example) they move faster. When energy is removed (for example by cooling) then the particles move slower.

Changing state

Adding or removing energy from particles can cause them to change state. Heating or cooling particles are ways of adding or taking away energy. It causes changes in the arrangement and movement of particles, and can lead to changes in state. There are names for the changes.

TERMCHANGE IN STATE

melt (melting)solid to liquid evaporate (evaporation)liquid to gas condense (condensation)gas to liquid freeze (freezing)liquid to solid sublime (sublimation)solid to gas deposit (deposition)gas to solid

ast0778 | Soft drink science 3: Three states of matter (background sheet) developed for the Department of Education WA

Solutions

A solution forms when a solid (the solute) dissolves in a liquid (the solvent). Although solutions are generally thought of as a solid dissolved in a liquid, both solute and solvent can be any phase: solid, liquid or gas. In this case the solvent is the phase that occurs in the greatest quantity.

PHASESEXAMPLE SOLUTION

solid in liquidseawater liquid in liquidalcohol in cleaners gas in liquidoxygen in water gas in gasair solid in solidmetal alloy, steel (carbon in iron) Suspensions are a type of mixture in which larger particles are held up or suspended by collisions with the molecules of the liquid or gas that contains them. Particles in a suspension will eventually settle. In a colloid (such as milk or vinaigrette) the distributed particles are so small that they do not settle.

SUSPENSIONCOMPONENTS

smokeash suspended in air muddy waterclay suspended in water fogwater droplets suspended in air

Solubility

Solubility is the defined as mass of solute that can dissolve in a given amount of solvent, at a particular temperature and pressure. When particles dissolve in a solvent to form a solution they are surrounded by solvent particles, as shown in the learning object Soft drink science 4: Solutions. A common misconception is that solute particles wander around in the gaps between solvent particles. This is not the case: there is an interaction between solute and solvent, known as solvation, in which solvent molecules form a solvation shell that surrounds solvent molecules. If the solvent is water this is known as a hydration shell. Solutions have a saturation point. This is the point when no more solute can dissolve in the solvent and the solution becomes a saturated solution. For some solutes the saturation point varies widely, depending on solvent temperature, for example sugar and water. However other solutes show only a small increase in solubility when temperature increases, for example salt.

Supersaturation

A supersaturated solution forms when a solution

contains an amount of solute dissolved in the solvent that is larger than the amount that is usually able to dissolve in a saturated solution. This is tricky to achieve and maintain but can be achieved by heating the solute to a high temperature, adding the solvent to create a saturated solution, then either cooling the solution; increasing the pressure of the solution; or removing some of the solvent through evaporation. Supersaturated solutions are usually very unstable.

Separation techniques

Mixtures and solutions can be separated using

physical methods.

TECHNIQUEAPPLICATION

chromatographyseparates substances that have different levels of attraction to a solvent crystallisationseparates dissolved solids from liquids distillationseparates liquids dissolved in liquids evaporationseparate liquids from solids that have very high melting points filtrationseparates suspended solids in liquid nucleationseparates gas from liquids

Particles

Particles in states of matter may be in the form of molecules or ions. Molecules are particles that are made up of atoms of one or more elements. They can be made up of single atoms, for example helium and argon, or many atoms like sulfur or carbon. Most molecules contain atoms of different elements. For example, a water molecule contains two hydrogen atoms and one oxygen atom; and glucose contains six carbon atoms, twelve hydrogen atoms and six oxygen atoms in each molecule. Ions are charged particles that have either gained or lost electrons. If they have gained electrons they are negatively-charged particles and if they have lost electrons they are positively-charged particles. In common salt, sodium chloride, each sodium atom loses one electron to form a sodium ion and chlorine atoms each gain an electron to form chloride ions.

More information

The BBC Bitesize website has some useful activities. Type a topic (such as 'distillation') into the search box in the top right corner of the page at http://www.bbc.co.uk/schools/gcsebitesize/science.