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

what change of state goes from solid to gas

sublimation

2

what goes from gas to liquid

condensation

3

what are the physical changes

change in shape
change in state
dissolving

4

signs of chemical change

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

5

where does photosynthesis take place

plants and bacteria
not animals

6

what is the molecule of sugar (glucose)

c6h1206

7

photosynthesis is

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

8

respiration takes place in ..

all living things

9

what does fuel react with

oxidants

10

3 fire factors

heat oxidant fuel

11

removal of any factors of fire does what?

extinguishes

12

what happens in oxidation

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

13

what is a nuclear change

particles are rearranged making new element

14

what is synthesis

a+b=ab

15

what is decomposition

ab= b+ a

16

what is an acid base neutralization

when an acid and base react to form salt and water
acid +base-> salt+water

17

what is combustion and what does it release a lot of

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

18

explain the nitrogen cycle

N2
nitrogen fixation
NH3
nutrification
Nox
denitrification
N2

19

what are the changes of state 5

melting
boiling
condensation
freezing
sublimation