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Flashcards in a bunch of things Deck (19)
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1
Q

what change of state goes from solid to gas

A

sublimation

2
Q

what goes from gas to liquid

A

condensation

3
Q

what are the physical changes

A

change in shape
change in state
dissolving

4
Q

signs of chemical change

A

Heat or light production
forms bubbles w/o heat
colour change
precipitation

5
Q

where does photosynthesis take place

A

plants and bacteria

not animals

6
Q

what is the molecule of sugar (glucose)

A

c6h1206

7
Q

photosynthesis is

A

6h2o + 6co2+ energy-> c6 h12o6+6o2

8
Q

respiration takes place in ..

A

all living things

9
Q

what does fuel react with

A

oxidants

10
Q

3 fire factors

A

heat oxidant fuel

11
Q

removal of any factors of fire does what?

A

extinguishes

12
Q

what happens in oxidation

A

reluctant (iron) loses electrons and oxidant (oxygen) gains electrons

13
Q

what is a nuclear change

A

particles are rearranged making new element

14
Q

what is synthesis

A

a+b=ab

15
Q

what is decomposition

A

ab= b+ a

16
Q

what is an acid base neutralization

A

when an acid and base react to form salt and water

acid +base-> salt+water

17
Q

what is combustion and what does it release a lot of

A

is it a form of oxidation that releases a lot of energy

18
Q

explain the nitrogen cycle

A
N2
nitrogen fixation 
NH3 
nutrification 
Nox
denitrification 
N2
19
Q

what are the changes of state 5

A
melting 
boiling 
condensation
freezing 
sublimation