science assessment term 1

Question 1

what is froth flotation?

Answer 1

A method using special chemicals to separate copper minerals from waste rock
1. ores are dug out of the ground
2. these are crushed into fine powder
3. powder is then mixed in with water and chemicals that are similar to detergent
4.then air is blown into the bottom of the container,
5.the malachite (mineral ore) is then carried to the surface by the air bubbles as malachite sticks to the chemicals
6. the waste rock then sinks to the bottom of the tank, unable to stick to the chemicals
7. the malachite then gets collected as they skim the surface to collect the copper it’s then further treated to extract pure copper

Question 2

how do we use magnets to separate iron?

Answer 2

A method using iron’s magnetic property to separate iron and waste rock
1. rock containing iron minerals are crushed into fine powder.
2. then dropped onto a conveyer belt where a magnetic roller appears
3. the roller attracts the pieces that contain iron as it is magnetic
4. the waste rock are not magnetic and therefore do not attach and drop down
5. iron containing pieces are further collected for proccessing

Question 3

what is crude oil

Answer 3

a natural oil with a mixture of petrol, oil, kerosene and diesel.

Question 4

fraction distillation

Answer 4

a method used to separate the different components of crude oil using boiling point
1.the crude oil is placed on a equipment called a fractioning column.
2. this is then heated
3. then each liquid evaporates at different times rising up
4. then it cools below boiling point and turns into liquid
5. it exists the column through a tube

Question 5

landfill

Answer 5

is a well managed disposal facility, where solid waste is buried between layers of dirt, soil and other materials to stop contamination of the surroundings

Question 5

polymer

Answer 5

is a natural or synthetic substances composed (made) of very large molecules, called macromolecules. / large molecules made of bonding

Question 6

macromolecule

Answer 6

very large molecules, which are multiples of simpler chemical units called monomers

Question 7

waste

Answer 7

is a product or material that is no longer suitable for use and is unwanted

Question 8

metallurgical engineer

Answer 8

is a person tat studies metals and how metals can be safely transformed into products that benefits our society

Question 9

plastic pollution

Answer 9

it is the accumulation of plastic waste in the environment, this can have a negative affect on all living things and the environment

Question 10

fossil fuel

Answer 10

is a generic term for non-renewable energy sources, like patrol, crude oil or coal. these fuels originate from plants and animals that existed in the past.

Question 11

recycling

Answer 11

a process to recover waste materials by reprocessing them into products other for it’s original purpose or something different

Question 12

steel

Answer 12

is an alloy of iron and carbon used in may infrastructures and industrial things

Question 13

e-waste

Answer 13

is a term describing all types of old, unused or discarded electrical or electronic equipment

Question 14

mineral ore

Answer 14

a mineral that contains useful metals, the mineral ore is called malachite