Gr-6- elements, compounds and mixtures

Which of these is not an element?

• Hydrogen

• Salt

• Chlorine

• sodium

True or False: An element is a pure substance that cannot be broken down.

• True

• False

When 2 or more elements join together, they form a ....

• mixture

• compound

• fusion

• bubblegum

the main component of steel is.....

• iron

• nickel

• chromium

• carbon

We represent all the known elements on the periodic table.

• True

• False

• Really? well, that is news to me.

Plaster of Paris is often used in false ceilings and to mend broken arms. its chemical name is.....

• sodium chloride

• copper chloride

• calcium sulphate

• calcium oxide

Duralumin is an alloy that is made up of

• aluminium, and copper

• aluminium and silver

• copper and silver

• aluminium and platinum

A substance that is dissolved in a solvent to form a solution is called as......

• salt

• sugar

• solute

• sublimation

Alloys are harder than pure metals because........

• they are made in Germany

• alloys have a distorted layer of metal ions- making them difficult to slide over

• alloys come with extended warranty

• alloys can be made by anyone

ethanol is often used in

• milkshakes

• glues and aftershave lotions

• rubber factory

• space fuel