7TH SCIENCE Unit 2 and 3 Review

A metal that is a mixture of two or more element

• alloy

• metal

• salt

• base

Which of the following is NOT a chemical reaction:

• rusting

• boiling

• oxidation

Which of the followings are NOT an element.

• oxygen

• iron

• water

• bronze

• gold

Vinegar is an alkali.

• TRUE

• FALSE

Brass is an alloy of copper and zinc.

• FALSE

• TRUE

Select all properties of metals:

• Conduct electricity and heat

• Dense

• Solid

• Lustrous

• Transparents

Select the alloys ONLY:

• brass

• steel

• iron

• bronze

• solder

Select all the pure metals ONLY:

• silver

• iron

• steel

• bronze

• gold

Cupronickel is NOT made of copper and nickel.

• FALSE

• TRUE

A substance that neutralizes an acid.

• Salt

• Base

• Indicator

• Acid