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A chemical change is when something cannot be changed back to its original form because ut creates a new substance.

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Physical change is a change that creates a new subtance but it is the oppisite of Chemical change. Chemical change annot be irreversible but physical change can for example oobleck onces the water evaporate it becomes cornstarch.

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Chemical change is a type of change that creates anpther subtance that is not reversible which for example like baking a bread after you made a piece of bread you can't just make it back for example flour sugar and yeast.

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Diffusion is the movement of particles from a high concentration to a lower concentration. Diffusion can also mean to spread over a wide area or between a large number of people. For example if you spray perfume it will diffuse all over the room. The scent will go all over the room into every crack.

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Dissolving is to have a solid for example a asprin tablet and put it onto a liquid then that asprin will fizz and that means the asprin is dissolving and then it will turn into a liquid and form a solution.

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Physical change is when something is changed but it can be reproduce. E.G. water cycle.

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Chemical change is when two substances mix together creating a new substance. A chemical change is a irreversible effect.

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A physical change is when 2 ingredients are mixed together to make a new substance. The difference between a chemical and a physical change is a physical change can be undone but a chemical change can't.

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A chemical change is when two ingredients are added together to make a new substance but it cannot go back to the old ingredients.

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A chemical change is when you add 2 substances together and will not be back to what it was before.
~Hillary

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Chemical Change: A chemical change is when you mix two substances together to form a new substance. This cannot be reversed. The new substance may give of heat or a new smell.

Example: When you bake a cake, you create something new. You can't change a cake back into eggs, flour, sugar and all that.

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Solubility is the amount of substance that dissolves in a liquid.

Example: When you put sugar into liquid it dissolves. The SOLUTE is the sugar. The SOLVENT is the water.

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Manipulate means to control or change a certain object to your specific needs.

Example: It was being manipulated.

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A molecule is the base of a element or compound. A molecule is composed of atoms, which are held together by chemical bonds. The bonds form when the atoms share or exchange their electrons. Atoms of some elements are eager to bond with other atoms, whilst some are not so eager.

Example: A water molecule is composed of atoms.

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Dissolving means that a solid already reached its boiling point, and it will transform into a liquid. In other words, a solid will be incorporated in a liquid when it dissolves. In other cases, the liquid will form into a gas.

Example of DISSOLVING in a sentence: Sugar easily dissolves in water.

Molecules

Molecules are groups of atoms  which bond together  to make the one and only states of matter. Without them, humankind, or any thing else in the universe would be gone. You see, everything is made  of molecules, and you are surrounded by them.

Example of MOLECULES in a sentence: You are surrounded by molecules; and that is a fact.

~Venessa L.

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A Physical change means that when you change something into something else. But it is reversible. For Example, the ce

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Chemical change means something that you can’t change back how it was before. Another word for chemical change is irreversible. For example a cooked egg, once you cook the egg you can’t change it back to a raw egg so that is why it is a Chemical change.

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Physical change means something that you can change back to normal and basically,  it means something that is a reversible change. Let’s take an ice cube for example,  an ice cube is a physical change because if you melt the ice cube it will turn into water but, if you put it in the ice cube maker and you put it in the freezer it will turn into a ice cube again.

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Evaporation is a process of liquid turning into a gas. The gas is called water vapor. When the vapor gets warm, it forms cloud. When clouds get too heavy and cannot hold anymore, the water falls back to earth in the form of rain, hail, snow. It is a physical change because it is reversible.

Liam

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gas.  One of four main states of matter, composed of molecules in constant random motion. Unlike a solid, a gas has no fixed shape and will take on the shape of the space available. Unlike a liquid, the intermolecular forces are very small; it has no fixed volume and will expand to fill the space available.

Samuel

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Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemicaldecomposition into two or more different substances.

Samuel

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A physical change is any change in matter that involves the substance going from one physical state to another. ... Examples of Physical changes:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemicaldecomposition into two or more different substances.

Samuel

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Solubility is an amount of substance(scientifically called a solute) that dissolves into the certain amount of the liquid/volume of the liquid(scientifically known as solvent) to form a solution. Many solutes have higher/lower solubility's as different solutes dissolve in different temperatures and pressures of air.

Example:  1.Sophie used to put sugar cubes in her coffee that would be cold and would not mix properly(that would be low solubility), then she found out that powered sugar would dissolve easily in her coffee. That would be high solubility.
2. Another example is that a certain amount of salt can be easily dissolved into the amount of water with the right temperature and pressure. Therefore it is high in solubility.

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A molecule is basically a combination of atoms. For an example you can have water molecules but you can't have water atoms. You can have hydrogen atoms and you can have oxygen atoms but when you combine it then you get a water molecule.

In a solid, liquid or gas the molecule's spacing is very different. In a solid the spacing between the molecules is small which means that the molecules are compact. This is why solids keep its shape. In liquids the molecules are not as tight but at the same time it is not to far away. This is why it is still in tact but it doesn't keep its shape. In gas the molecules are far away.

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There are 3 states of matter and those are solid liquid and gas.
You can change the state of matter by heating it or by freezing it.
For some objects such as paper you can't change it's form because if you apply heat to it then it will simply burn.

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Chemical Change and Physical Change       Sol

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Chemical Change and Physical Change       Sol

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A chemical change is irreversible.

A physical change is reversable.

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A chemical change is something that can't be turned back. When it turns into something, no matter what you do it will not turn back to its original shape or form.

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Evaporation is when the water get's too hot that is turns into vapour and evaporates. It is simply the process of liquid turning into vapour.

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mixing -To combine or blend into one mass or mixture, Mixing is when you create or form something by combining ingredients,Mixing can also mean To add (an ingredient or element) to another to form something new.

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dissolving is when some thing melts or when some thing liquefy .dissolving means that if you mix sugar with hot water then the sugar would dissolve into the hot water .

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- A group of atoms bonded together representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

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Emir

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- Spreading things more widely.
- The even spreading of light to reduce glare and harsh shadows.
- The intermingling of substances by the natural movement of their particles.

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Reversible - is chemical change between two states. For example there is a ice cube. It melts you put it back by freezing it again. It turns back into a ice cube . you have reversed the progress.

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reversible is when the object or the thing can change back - keaton

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reversible is when the object or the thing can change back - keaton

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evaporation is when the water is too hot and the particles are expanding and the water will start to evaporate.

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States of Matter Solid Liquid Gas - Kieran                                   

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States of Matter Solid Liquid Gas - Kieran                                   

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Solid-is when the Molecules are very tight and compact so you cannot push on it, and Solid is the state of matter that you can hold in your hands.

Liquid- is when the Molecules are not so close but not that spread out but you cannot hold liquid, water can turn from a solid to a liquid from melting.

gas-is when the Molecules are very spread out you can not see most gases and cannot feel most gases. water can turn into gas from a liquid and gases can turn into a liquid by a process called condensation.

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Freezing: this is when a liquid reaches the freezing temperature and becomes a solid. For example, when water is put into the freezer and reaches temperatures below 0 degrees Celsius, it will freeze in a short amount of time and become ice (the solid form of water)!

Liquid: when the molecules of a compound are very spread out. It is also shows the physical state of a material between boiling and freezing temperatures. For example, water at room temperature is a liquid, When a liquid reaches a freezing temperature it will become a solid and when water reached boiling temperature it turns into gas.

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A Chemical Change is a change that is not reversible no matter what you do. Anything that burns is a good example. If someone were to burn a piece of paper, you could never get it back, it is changed for good!!!

A Physical change is a change that it reversible like water. Water can change into a solid liquid or a gas and nothing is permanent.

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Evaporation - This happens when any liquid (such as water) turns into vapour.  (e.g. The evaporation of liquid will not just happen in a few hours. It will take longer than that.)

Solubility - The quality or state of being dissolvable. (e.g. Salt has great solubility, immediately disappearing into the solution.)

Information about Evaporation:

https://water.usgs.gov/edu/watercycleevaporation.html

You can click the picture to enter its website. It is not the same one as above.