Complete the following
1- Mass – volume
2- color
3- gm – C𝑚3
4- Mass – gm\c𝑚3
5- Copper-gold – Nickel-chrome
6- Iron-aluminum – Wood-plastic
7- Copper-aluminum – good
8- rust – Corrosion
Choose the correct answer
1) d
2) b
3)d
Choose the correct answer
4) a
5) b
6) a
7) b
8) c
9) a
Write the scientific term:
1) Matter
2) Melting point
3) Nickel and Chrome alloy
4) Gold and Copper alloy
5) Less active metals
6) Inactive metals
Give reasons for:
1- Because density of wood is less than that of water, while density of lead is more than that
of water.
2- Because ice has low melting point.
3) Because steel is a good conductor of electricity, while plastic is a bad conductor of
electricity.
4) Because they react with oxygen when they are exposed to humid air.
5) Because they are inactive metals.
Mention an example for each of the following:
1) Ice \ wax \ butter
2) Iron \ Copper \ Aluminum
3) Nickel-Chrome alloy
4) Copper-Gold alloy
5) Stainless steel alloy
6) Rubber
What is meant by:
1) It is the temperature at which matter begins to change from a solid state to a liquid state.
2) It is the temperature at which matter begins to change from a liquid state to a gaseous
state.