science homework

1. Doors- They transfer force from your hand to the door. Newtons third law. 
2. Electronics- sort of self-explanatory. 
3. Baking Mix- Many ingredients mix together to form a chemical reaction that causes the food to be cooked 
4. Cleaning- Detergents are chemicals that pull dirt off of other things 
5. Certain types of clocks- mechanics 
6. Lamps- They separate electrons from atoms which emits a glow 
7. Eyeglasses/Magnifying Glasses- They bend light in a way that makes objects bigger or brings them into focus. 
8. Sinks- They use fluid dynamics to send water through pipes 
9. Plants- They use photosynthesis to produce food 
10. Ovens- Use convection current to heat things
11. Ice cubes-changes from a liquid to a solid
12. microwave-uses radioactive waves to make things hot
13. Heater-When electric current flows through any resistance, it generates heat
14. Pylons-They are used to support conductors which operate at very high voltages
15. Fridge-Modern refrigerators use a gas called HFC-134a, also called tetrafluoroethane 
16. Trees-They breath in co2 and breath out o2.
17.Ball point pen-A ball point pen is a pen that uses a small rotating ball made of brass, steel, or tungsten carbide to disperse ink as you write.
18. Remote control-Remote controls work using Infra Red technology.
19. Perfume-is the fragrance molecules that
cause the scents we smell by sending electrical messages to our brains which create the perceived aroma.
20. glass-glass contains about 70-72 weight % of silicon dioxide (SiO2). The major raw material is sand (or "quartz sand") that contains almost 100% of crystalline silica in the form of quartz.
21.Iron-The combination of the iron's heat and steam breaks the hydrogen bonds that were previously formed into a wrinkled state. When those wrinkled bonds are broken, the weight of the iron straightens out the cloth fibers. When the fibers cool, the hydrogen molecules bond once again in the straightened state. 
22. Iron(metal version)-It's just made by nuclear fusion that requires very high pressure and temperature.
23. Hairdryer-A hairdryer works on electricity, sucking in air and blowing it past heated elements, forcing hot air out to dry the hair.
24. magnetic trains-Maglev (derived from magnetic levitation), is a system of transportation that uses magnetic levitation to suspend, guide and propel vehicles from magnets rather than using mechanical methods, such as wheels, axles and bearings. 
25. Diesel trains-The diesel engine only runs a big electric generator and that generator sends electric to electric traction motors that drive the wheels.
26. Electric trains-The tracks or the over head power lines are live and provide voltage to the DC(Direct current) motors that power the trains. 
27.Dehumidifier-An air conditioner is a form of a dehumidifier. An air conditioner compresses gases to move heat from one location (inside) to another (outside).
28. Wood-It a heterogeneous, hygroscopic, cellular and anisotropic material. 
29. Hybrid cars-A hybrid car works by combining two smaller engines to produce the power of a larger engine. Usually, it's a gas engine and an electric engine.
30. Planes- it uses lift, thrust, drag and gravity.
31. Mirror-Light reflects off a mirror because of the interaction of the light with the free electrons in the metal that is used in all mirrors.
32. CD/DVD-CD's and DVD's are made of aluminum and they have little, little holes in them that store data which is burned from a cd/dvd burner with a laser
33. Sun-The sun burns by *nuclear fusion* - four hydrogen atoms are being fused into a single helium atom, billions of times each second, under tremendous heat and pressure.