©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
Science - World Scholars Cup Exam
Study Guide with Compete Solutions
Batteries - Ans:✔✔-Cathode, Electrolyte, Anode (Top to bottom). Creates energy through attraction of
charges
Discharge - Ans:✔✔-Converts chemical energy to electrical energy
Wireless Charging - Ans:✔✔-Uses electromagnetic field that sends electrodes to the battery. Done
through two induction coils, one on each device. Electrodes travel from one coil to another
Exploding Batteries - Ans:✔✔-Explodes due to overheating a small filament. Most likely are Lithium
batteries
Silicon Anode - Ans:✔✔-Can store 20x more charge than normal batteries
Lithium Metal - Ans:✔✔-Can charge more but can explode
Bacteria Battery - Ans:✔✔-Uses EXO electrogens (Bacteria) to get energy. Harness the energy through
paper. Energy from cellular respiration.
Direct Current - Ans:✔✔-Current flows none stop left to right
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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
Alternate Current - Ans:✔✔-Current flows forward then stops a little repeated. Better for long distance
British Plugs - Ans:✔✔-Due to low copper from ww2 changed plugs to use less copper
Air Conditioning - Ans:✔✔-Uses liquid to cool down air that is then sent out afterwards
Heating - Ans:✔✔-Takes air from outside, heats it over chemical "propane" and sends out air again.
Which is worse, Heating or Cooling? - Ans:✔✔-Heating as accounts for 7 - 10% of greenhouse gasses
Air Purifier - Ans:✔✔-Takes in air and removes dust and particles
Activated Carbon (Air Purifier Method) - Ans:✔✔-Removes dust through magnetic from the air
Ionizing Purifier - Ans:✔✔-Makes dust stick to ground and out of air
Foldimate - Ans:✔✔-Takes care of cleaning and folding clothes, releases in 2020
Vaccum Cleaner - Ans:✔✔-Invented in 1860, sucks up dust using centrifugal separation
Dishwashers - Ans:✔✔-Spraying hot water on a grid to clean dishes. First invented in 1850
Home Robots - Ans:✔✔-Automated Machinery that assist in house work
Microwaves - Ans:✔✔-Uses electro magnetic radiation to heat up water molecules in food
Toasters - Ans:✔✔-Heats up a metal grid and toasts the bread. Uses 80/20 Nichrome for the metal
Page 2/6
FIRST PUBLISH OCTOBER 2024
Science - World Scholars Cup Exam
Study Guide with Compete Solutions
Batteries - Ans:✔✔-Cathode, Electrolyte, Anode (Top to bottom). Creates energy through attraction of
charges
Discharge - Ans:✔✔-Converts chemical energy to electrical energy
Wireless Charging - Ans:✔✔-Uses electromagnetic field that sends electrodes to the battery. Done
through two induction coils, one on each device. Electrodes travel from one coil to another
Exploding Batteries - Ans:✔✔-Explodes due to overheating a small filament. Most likely are Lithium
batteries
Silicon Anode - Ans:✔✔-Can store 20x more charge than normal batteries
Lithium Metal - Ans:✔✔-Can charge more but can explode
Bacteria Battery - Ans:✔✔-Uses EXO electrogens (Bacteria) to get energy. Harness the energy through
paper. Energy from cellular respiration.
Direct Current - Ans:✔✔-Current flows none stop left to right
Page 1/6
, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
Alternate Current - Ans:✔✔-Current flows forward then stops a little repeated. Better for long distance
British Plugs - Ans:✔✔-Due to low copper from ww2 changed plugs to use less copper
Air Conditioning - Ans:✔✔-Uses liquid to cool down air that is then sent out afterwards
Heating - Ans:✔✔-Takes air from outside, heats it over chemical "propane" and sends out air again.
Which is worse, Heating or Cooling? - Ans:✔✔-Heating as accounts for 7 - 10% of greenhouse gasses
Air Purifier - Ans:✔✔-Takes in air and removes dust and particles
Activated Carbon (Air Purifier Method) - Ans:✔✔-Removes dust through magnetic from the air
Ionizing Purifier - Ans:✔✔-Makes dust stick to ground and out of air
Foldimate - Ans:✔✔-Takes care of cleaning and folding clothes, releases in 2020
Vaccum Cleaner - Ans:✔✔-Invented in 1860, sucks up dust using centrifugal separation
Dishwashers - Ans:✔✔-Spraying hot water on a grid to clean dishes. First invented in 1850
Home Robots - Ans:✔✔-Automated Machinery that assist in house work
Microwaves - Ans:✔✔-Uses electro magnetic radiation to heat up water molecules in food
Toasters - Ans:✔✔-Heats up a metal grid and toasts the bread. Uses 80/20 Nichrome for the metal
Page 2/6
