science Physics quiz
exothermic
Energy released "exit"
endothermic
Energy absorbed "enter"
Cellular respiration (equation)
C6H12O6 + 6 O2 = 6 CO2 + 6 H2O + Energy
where does cellular resperation occur
The mitochondria of cells (all living things)
Cellular respiration- processes
transforms, chemical potential energy (food) to carry out life processes
photosynthesis (equation)
6 CO2 + 6 H20 = C6H12O6 + 6 O2
where does photosynthesis occur
The chloroplast of plant cells
photosynthesis- process
plants take CO2 + H2O and store sunlight energy in the bonds of glucose (C6H12O6)
fossil fuels (equation) RECOGNIZE
2 C8H18 + 28 O2 = 16 CO2 + 18 H2O
Advantages of Fossil Fuels
- still a very abundant fuel source
-still relatively cheap
- contain a lot of chemical potential energy
Disadvantages of Fossil Fuels
-very polluting
-contributes to climate change
Fuel Cells (equation)
2 H2 + O2 = 2 H2O
Advantages of Fuel Cells
-very clean source of fuel with NO harmful products
-H2 is limitless
Disadvantages of fuel cell
-very expensive technology
- potential hazards using H2 as a fuel
Types of decay
Alpha, Beta, Gamma
what can alpha penetrate
air but stopped by paper
what can beta penetrate
paper but stopped by aluminum
what can gamma penetrate
most substances but stopped by lead
Apha symbols
4,2 He 4,2 a 4,2 <
Beta symbols
0,-1 B 0,-1 e 0,-1 b
Gamma symbols
0,0 | , 0,0 C
Nuclear Fission
large nucleus splits apart
Nuclear Fusion
2 smaller nucleus or joined/fussed together to form a larger nucleus
Fission differences
- daughter products usually radioactice
-can occur at any temperature
-occurs in power plants
Fusion differences
-daughter products usually non-reactive
-requires tremendous temperature/pressure
-occurs in the core of a star