bushfires - natural hazard

Question 1

ground fire - characteristics of a bushfire

Answer 1

Occur underground and impact topsoil and subsurface vegetation

Question 2

surface fires - characteristics of a bushfire

Answer 2

Occur on surface of the ground and impact low lying vegetation

Question 3

Crown fires - characteristics of a bushfire

Answer 3

when surface fires climb along like trees(called ladder effect)

Question 4

radiant heat

Answer 4

The heat is admitted by an approaching bushfire, main cause of death

Question 5

fire front

Answer 5

The direction that the fire travels

Question 6

flank

Answer 6

The side of the fire as it travels

Question 7

Head fire

Answer 7

The main section of the front

Question 8

backing fire

Answer 8

when the fire burns behind the ignition points and travels against the wind 

Question 9

bushfires can be described in terms of:

Answer 9

-flame height
-Flame length
-Flame depth
-rate of speed
-spotting distance 

Question 10

Human causes

Answer 10

cigarettes, campfire, angle grinder, damaged electricity poles and wires, -clearing of land cover-> Higher rates of evaporation and dry conditions
-arson

Question 11

Natural causes

Answer 11

Lightning strikes, ember attacks from a bushfire which cause spot fires, fuels can combust from radiant heat of approaching fire 

Question 12

prescribed burns

Answer 12

To reduce fuel load lower risk of bush fire
how? burn Around the edge so we get a burned area and then the fire bomb into the middle of the burn

Question 13

fuel loads

Answer 13

Australian flora, eucalyptus, have adapted to dry conditions and contain a lot of oil and shed leaves which result in leaflitter