6. Envrironmental impacts- the making of materials from natural raw materials. Name one of the two processes and two environmental impacts for each.
Mining and Processing. There are lost of rock wasted and it leaves a scar on the landscape. (Mining) Pollutants are caused by transportation, electrolysis requires more energy than reduction.
Mining and Processing. No impact and landfill sites remove wildlife habitats and are an eyesore.
Mining and Disposal. Air/noise pollution, pollutants are caused by transportation.
7. What happens when an Ionic compound melts?
The electrostatic forces between the charged ions in the crystal lattice are broken down and the ions are free to move.
The electrostatic forces between the charged ions in the crystal lattice are broken down and the ions are unable to move.
The electrostatic forces between the charged ions in the crystal lattice are built down and the ions are free to move.
8. A lot of the silicon and oxygen in the atmosphere is present as...
atoms.
the compound silicon dioxide.
elements.
9. In a metal, what are the positively charged metal ions held together by?
A 'sea' of neutrons.
A 'sea' of electrons.
A 'sea' of protons.
10. Electrolysis is..
the breaking down of fuels.
the breaking down of an electrolyte using an electric current.
the breaking down of electricity.
11. We can use precipitation reactions to detect..
ions in gases.
ions in aqeous solutions. (dissolved solutions)
ions in solids.
12. The atmosphere is a layer of gas surrounding the Earth. It's made up of...
Elements: Such as Nitrogen- 78%, Oxygen- 21%, Argon- 1% and also compounds such as carbon dioxide and water vapour. (Carbon dioxide- 0.01%)
Elements: Such as Nitrogen- 78%, Oxygen- 1%, Argon- 21% and also compounds such as carbon dioxide and water vapour. (Carbon dioxide- 0.01%)
Elements: Such as Nitrogen- 21%, Oxygen- 78%, Argon- 2% and also compounds such as carbon dioxide and water vapour. (Carbon dioxide- 0.01%)
13. At the positive electrode, oxygen ions lost electrons to become..
neutral atoms.
negative atoms.
positive atoms.
14. Why is recycling a good disposal technique?
No pollutants are formed in the process.
It uses less energy than the initial manufacturing.
It uses no energy in comparison to the initial manufacturing.
15. Sometimes very large amounts of Ores need to be mined in order to ..
recover a small percentage of valuable minerals, for example carbon.
recover a small percentage of valuable minerals, for example copper.
recover a large percentage of valuable minerals, for example copper
16. What are Ores?
Metals.
Ores are rocks that contain varying amounts of minerals from which metals can be extracted.
Non-metals.
17. Iron- Name a property and a use of the metal Iron.
Strong-used to make saucepans.
High melting point- used to make saucepans.
Malleable-used to make saucepans.
18. Aluminium- Name a property and a use of the metal aluminium.
Malleable-used for drinks cans.
Strong-used for drinks cans.
High melting point- used for drinks cans.
19. Select the 3 correct order of stages as to how Ionic compounds conduct electricity.
1..An ion breaks away from the lattice. 2.A water molecule is attracted to an ion in the crystal lattice.3.The ion moves freely through the water
1. A water molecule is attracted to an ion in the crystal lattice. 2.An ion breaks away from the lattice. 3.The ion moves freely through the water.
1. The ion moves freely through the water. 2.An ion breaks away from the lattice. 3.A water molecule is attracted to an ion in the crystal lattice.
20. The chemicals that make up the atmosphere consist of...
non- metal elements and molecular compounds made up from non-metal elements.
non- metal elements and molecular compounds made up from metal elements.
metal elements and molecular compounds made up from non-metal elements.
