8.1 alloy and its important

What is an alloy?

• a mixture of two or more elements where the main element is a non metal.

• a mixture of two elements where the main element is a metal.

• a mixture of two or more elements where the main element is a metal.

• a mixture of two or more elements where all the main element are metal.

Based on Diagram,_______________is used to make souvenirs_

• Brass

• Bronze

• Duralumin

• Pewter i

Based on Diagram,_______________to make the body of an aeroplane.

• Brass

• Bronze

• Duralumin

• Pewter i

Based on Diagram,_______________is used to make medals.

• Brass

• Bronze

• Duralumin

• Pewter

Based on Diagram,_______________is used to make keys

• Brass

• Bronze

• Duralumin

• Pewter

Based on Diagram,Steel is used to__________

• make keys

• the body of a car

• make medals

• make the body of an aeroplane.

Stainless steel is more resistant to corrosion than iron

• True

• False

Based on Experiment 8.1 page 255 and 256,why must the stainless steel plate and iron plate be cleaned with a sandpaper?

• To remove the oxide layer from the surface of the metal

• The smaller the diameter of the dent, the harder the substance

• The rate of corrosion of stainless steel is lower compared to iron

• Copper block

Based on Experiment 8.1 page 255 and 256,compare the rate of corrosion of the stainless steel and iron plates.

• To remove the oxide layer from the surface of the metal

• The smaller the diameter of the dent, the harder the substance

• The rate of corrosion of stainless steel is lower compared to iron

• Copper block

Based on Experiment 8.1 page 255 and 256,which block formed a dent with a larger diameter?

• To remove the oxide layer from the surface of the metal

• The smaller the diameter of the dent, the harder the substance

• The rate of corrosion of stainless steel is lower compared to iron

• Copper block