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Solid:A solid is something that is firm that stays in shape and holds its form for quite a bit of time and has length and some weight.

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Solid:A solid is something that is firm that stays in shape and holds its form for quite a bit of time and has length and some weight.

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-carly

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 liquid :A substance that runs freely but is of even volume, having a consistency like that of water or oil.

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 liquid :A substance that runs freely but is of even volume, having a consistency like that of water or oil.

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-carly

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Definition- physical change
A physical change is where an object is made to look different but can still be made to it's original form, this change can be seen very clearly an example would be dropping a water melon it is still water melon but just squishy.

Definition-chemical change
A chemical change is when two or more chemicals bind (fuse) and create a new substance, this change cannot be reversed no matter how  hard you try, the new substance may include things like a new smell, taste, look, sound, it also cannot be seen without an incredibly strong microscope.
eg: rust you cannot take back rust once it is on iron because the tiny molecules have blinded and made rust!

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Definition: dissolving is when a solid gets put in a liquid slowly breaks away witch then fuses with the liquid and they bind to produce something new.

Eg: putting a block of sugar into a hot drink like tea or coffee.

It is usually a chemical change because of two reasons; The liquid that once was water in now sugary water witch affects the taste and appearance  and a new substance is made.

Also, you cannot take the sugar out of the water and turn back into a cube because it has dissolved and fused with the liquid.

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Definition: When something has turned from a gas/liquid etc. turns into a solid.

Example: Water can turn into 3 common states of matter. It can turn into liquid (water), which can turn into gas, which can turn into a solid (Ice).

- Destiny 6A

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Definition: When you alter/edit/change a material to turn/change it into something else to suit your purposes.

Example: We manipulated many materials to create our boats.

- Destiny 6A

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Definition:  A change that is reversible and it can be seen. Even though the state of matter might have changed, no substance is created.

Example: When the whipping cream turned into butter.

- Timothy 6A

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Definition: When something cannot be changed back to it's own original state.

Example: When a new substance has been created and cannot be reversed

- Timothy 6A

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Definition:
1.make or become hard or solid.

2.When a liquid solidifies or is solidified, it changes into a solid

3. To become united and strong

For example
Freezing water turns into ice when it is  in a freezer.

By Sahil

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Definition:
1.The quality or condition of being soluble.

2.The amount of a substance that can be dissolved in a given amount ofsolvent.

3.the ability of a substance to dissolve.

For example
When sugar dissolves

By Sahil

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A physical change is a change in matter that involves the substance going from one state to another. Physical changes are reversible and could involve a change in density, size, shape and colour too. During a physical change, no new substance is created.

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Chemical changes occur when a substance combines with another substance. Chemical changes also involve chemical reactions and the creation of a new substance. It is usually irreversible. Example:  The rusting of iron.

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Taking a solid object and changing its  temperature and the surroundings can change it to liquid this is called melting
EXAMPLE :
When you leave a ice cube out on a sunny and hot day it will eventually melt because of the temperature it is in.

Hayley

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Something can go back to it original state. You can change the state back to normal.
Example:
When ice has melted it has turned into liquid and if you put it back into the freezer it will turn back to ice that is reversible.

Hayley

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When something can be returned to it's original state.
For example, if you freeze water it turns into ice but it is reversible because you can turn the ice back into water.

Nicole

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A chemical change is when two or more substances are combined to form something new.  Most chemical changes are irreversible.

Nicole

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Evaporation-

when water turns from a liquid to a gas and floats up into the clouds.
E.G. at the start of the water cycle the sun turns the water into gas and after that turns into part of a cloud

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Change-

to make some different from its original form.
E.G. when you add soap to water bubbles com up in a foamy substance

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A liquid is a sample of matter that conforms to the shape of a container in which it is held, and which acquires a defined surface in the presence of gravity. The term liquid is also used in reference to the state, or condition, of matter having this property.

Copied from: http://whatis.techtarget.com/definition/liquid

-  Varshini Jairam

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Dissolving is to make a solution of, as by mixing with a liquid and passing it in a solution that could be made.
Dissolving can also become or cause to become incorporated into a liquid so as to form a solution.

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Solidifying is an ingredient that can solidify in a mixture that can make it hard, strong and solid.
Solidifying  is also the process of being hard or solid by drying or cooling.
- Elizabeth 6A

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Physical Changes usually are when they are reversible changes in the physical properties of a substance, size or shape.

- Varshini 6A

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Physical change means it is reversible,you can change it back to the previous form.

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Irreversible means it cannot change it back to the previous form.

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Molecules are the smallest part of a substance that can only exist on it's own. Molecules are made out of two or more atoms bonded together. In a solid, Molecules are all packed together in solids for it to stay in shape, Molecules in liquid are loosely apart from each other so liquids can flow and widely spaced in gasses so it can spread out easily.

- Sofia Ng

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Evaporation means for something to become less and eventually disappear. For example, when water gets boiled in the kettle it evaporates into a gas.

"When liquidevaporates, it changes into a vapor."

- Sofia Ng

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Diffusion is when the molecules inside the object gets into another matter (Which is normally water)
.For example, a tea bag placed into warm water shall be diffused by it.

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Andrew: Molecules      Molecules are the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.

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Andrew: Molecules      Molecules are the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.

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"Water is made of thousand of molecules"

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Andrew: Solubility capable means  being dissolved or liquefied.

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Andrew: Solubility capable means  being dissolved or liquefied.

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"Ice is soluble"

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Gas is a substance like air . It is like air because all the molecules inside it has a lot of space inside it which leads it to move.

e.g " When water evaporates it turns into vapor which is a type of gas"

Avirah George

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To change materials to suite a purpose for one and another's advantage.

e.g " Class 6A manipulated materials to create a boat that floats"

Avirah George

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Permeability means the quality of letting fluids through it, like a sponge is permeable, because water and gas  are both able to pass through the holes.

"Aerated concrete has good permeability, because there are a lot of holes inside, allowing water to travel through."

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Diffusion happens when particles are spread more widely apart in a substance e.g. food colouring in water or paint mixed in with water.

"The molecules that make up food colouring are spread throughout the liquid , changing it's colour.

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A solid is a 3D shape or thing that you can hold and touch. For example rock because it is hard and you can hold it.

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When something is mixed together and cannot be changed back to it's original state or form. For example, when we mixed our yeast, water and sugar together, we couldn't change the yeast or sugar back to it's powder it used to be.

Clarice

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Dissolving means something to become into a liquid by heating,melting etc and it from a solution.

Claire

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to make something become hard or solid
"the ice cream is put in the freezer and slowly solidify"

Claire

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A physical change is where the form of a material changes, but the substance is still the same. For example, when you take a popsicle stick out on a hot day, it will melt, and change from solid to liquid. Put it back into the freezer, it'll cause the popsicle to change back from liquid to solid. Most of the times, physical changes are reversible.

Clarice

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Diffusion technically means the spreading of something more widely. If we are to use this word in our unit it's exactly like the mint tea we had. Since once the mint leaves juice was squeezed out, that had to be mixed with the water. So the flavors spread through the water.
Eg:"The rapid diffusion of ideas and technology"

Luca Ho

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An atom is the smallest chemical element that can exist. Everything is made of atoms including molecules themselves are made from atoms. Atoms are the key to solids,  liquids etc.

Luca Ho

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A physical substance that occupies space. Matter cannot be made or destroyed. The whole world is made of matter!

Robbie 6A

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Diffusion is when the molecules of an object get spread through another substance (usually liquid)
"Water colour paint can diffuse in water, as its molecules get spread out."

Ajax Li 6A

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-The property of being soluble, and able to be dissolved.
"Sugar has high solubility in water."

Ajax Li 6A

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When 2 or more atoms bond they make molecules such as water (H2O) H2O stand for H=(2)Hydrogen and O=Oxygen.
Adam 6A

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A process that involves changing the structure of an element to make something else by one element react with other element and the result cannot turn back into those element that made that result.
Brendan

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(To) Change something (material) to fit a certain use or purpose.
Adam 6A

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Unable to be changed back into its original or previous form or state.

Adam 6A

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When something can be changed back into it's original form/shape. Like when you freeze water it turns into ice but you can always change the ice (Solid) back into to water (Liquid).

Stella

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A physical change is reversible and if you mix 2 substances together it changes the shape, size or form. Example=Water if you freeze it changes into ice but it can always turn back to water (Liquid) and the water changes it shape, size and/or form.

Stella

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Not possible to be changed or altered into it's pure or previous condition.

Brendan

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It is when liquid turns into gas due to heat or chemical reactions, for example, when you heat water up, it causes the water molecules to rearrange to form into gas

Harris

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It is when a object's molecules break apart due to chemical reactions, for example, when you sprinkle some salt on ice, it causes a chemical reaction which melts the ice.

Harris

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A material which is hard and and is not a liquid or a gas, for example, metal is a solid because it is hard.

Harris

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To freeze or make something cold. When you freeze a liquid and it reaches 0 degrees(liquids freezing point) It turns into a solid, such as ice.

Daryl

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With the formula below, freezing-point depression can be used to measure the degree of dissociation or the molar mass of the solute. This kind of measurement is called cryoscopy ( Greek cryo = cold, scopos = observe "observe the cold") and relies on exact measurement of the freezing point.

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To melt something, like putting sugar into a cup of hot water, after a while the sugar will dissolve into the hot water.

Daryl

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To change a figure or material to suit one or another propose or for their advantage

Example

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A chemical change is a change that is irreversible. It  could have created something new or created:
gas, foam, fizz and lots more

Zheng Hao

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Molecules are made out of atoms. Molecules form items or living things , Everything is made out of molecules.
Water molecule:

Zheng Hao

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Have a go at testing your own understanding of the vocabulary related to this unit. What will your score be out of 10? Ms Abidi
http://www.bbc.co.uk/bitesize/quiz/q76443379