Year 7 - Particles

gas

Moves randomly, particles don't touch and stay in the shape of its container

liquid

Moves randomly but still touches sometimes, stays in the shape of its container

solid

stays in a fixed position, vibrates in the same position, are touching, does not stay in the shape of its container

solid, liquid, gas

Sort the three states of matter into order of increasing energy

gas, liquid, solid

Sort the three states of matter into order of decreasing energy

physical changes

What term can be used to describe interconversions between states of matter?

melting

What is the name for the physical change when a solid turns into a liquid?

freezing

What is the name for the physical change when a liquid turns into a solid?

boiling / evaporating

What is the name for the physical change when a liquid turns into a gas?

condensing

What is the name for the physical change when a gas turns into a liquid?

something that is made up of only one element or compound

What is a pure substance?

What is a mixture?

when there are two or more elements or compounds not chemically bonded

What process is this a diagram of?

filtration

Give the term being defined: The temperature at which a liquid boils.

boiling point

Give the term being defined: A specific temperature at which a solid turn into a liquid.

melting point

Give the term being defined: Solution passing through a filter.

filtrate

Give the term being defined: Describes a substance that cannot be dissolved in a certain liquid.

insoluble

Give the term being defined: Contains the maximum amount of solute that can dissolve in that amount of solvent at that temperature.

saturated solution

Give the term being defined: Substance that dissolves in a liquid to make a solution.

solute

Give the term being defined: Formed when a substance has dissolved in a liquid.

solution

Give the term being defined: The liquid in which a solute dissolves to make a solution.

solvent

Which state of matter takes a fixed position?

solids

Will substances expand when they are hotter or colder?

hotter

True or False: substances contract when they are colder

True

Saturated Solution

a mixture cannot dissolve any more solute because they do not have enough spaces between the particles

Pure substances

something that only contains one type of particle (can be chemically joined)

A mixture/ impure substance

2 or more substances that are mixed together but are not chemically joined.

Solution

A mixture that is made when a solid dissolves and mixes with a liquid

Filtering

Method used to separate an insoluble solid from a liquid

Insoluble

Something that is unable of dissolving

Soluble

Something that can be dissolved

Evaporation

Method used to separate a soluble solid from a liquid, also known as the process of turning a liquid to a gas

Dissolve

A solid that incorporates into a liquid to form a solution

Solute

A solid that dissolves

Solvent

A liquid that does the dissolving

Diffusion

movement of particles that allows them to spread out and mix with other particles, when particles move from an area of high concentration to an area of low concentration.

How does the kinetic energy of the particles increase?

it rises along with the temperature

All particles are attracted to each other: explain in depth

Some particles are attracted to each other strongly, but others attract to each other weakly

True or False: Not all substances are made of particles

False