Chemical Elements, Compounds, and Mixtures
These substances are made from one kind of atom.
What are elements?
This separation technique is used to separate insoluble solids from mixtures.
What is filtration?
Unlike boiling, this process of vaporization occurs only at the surface and at the temperatures below the boiling point.
What is evaporation?
This scale is known as the thermodynamic scale of temperature.
What is the Kelvin Scale?
This is the college that Ms.Dara attended.
What is the University of College London?
Concrete and Orange Juice will fall into this category of mixture.
What is a heterogeneous mixture?
This variation of filtration is used for very finely suspended solids that can clog filter paper.
What is vacuum filtration?
Changes of state are this type of change, meaning they do not alter the chemical properties of the substance.
What are physical changes?
At the boiling point, bonds are breaking and there is no increase of this.
What is Kinetic Energy?
How many years has Ms.Dara been teaching?
This type of mixture has uniform composition and properties throughout.
What is a homogeneous mixture?
This tool, along with filter paper, is used to separate a solid from a liquid in filtration.
What is a filter funnel?
Solids have this type of volume and shape, with particles packed closely in a regular pattern.
What is a fixed volume and shape?
On a heating curve, particles do this as a temperature rises.
How many years has Ms.Dara been in the US?
What is 9 years?
When nitrogen and oxygen mix in the air, they retain these.
What are their same characteristic properties?
In crystallisation, the solution is heated to allow this to happen.
What is the solvent evaporating?
Boiling occurs when this reaches the external atmospheric pressure.
What is vapor pressure?
On the Kelvin scale, this is the value at which the melting point of ice occurs.
What is 273.15 K?
Which continents have Ms.Dara lived in?
What are Asia, Europe, Africa, and North America?
Air separated into components, uses this technique.
What is fractional distillation?
This separation technique is used to separate a dissolved solid like copper sulphate from a solution in hot solvent than in cold.
What is crystallisation?
Gases can be compressed into a much smaller space because of this feature of the particles.
What is a lot of space between the particles?
During boiling, energy is used entirely for this process rather than increasing the Kinetic energy of particles, which is why temperature stays constant.
What is breaking the bonds between particles?
What are the ages of Ms.Dara's kids?
What are 4 and 6?