Geography

Question 1

What is the definition of an Earthquake??

Answer 1

The shaking of the ground

Question 2

The definition of Volcanic eruption??

Answer 2

Ejection of gases,magma,debris from the mantle through the volcanic vent

Question 3

What is another word for typhoon ??

Answer 3

Tropical cyclone

Question 4

The definition of typhoon ??

Answer 4

Severe storms formed over the tropical ocean

Question 5

Where do typhoons form??

Answer 5

They mainly focus on over the ocean of tropical regions

Question 6

In what conditions are typhoons formed ?? Name 2

Answer 6

1. The temperature of the sea water being higher than 26 degrees Celsius
2. Strong air convection current

Question 7

The definition of Flood??

Answer 7

Overflow of river water/ sea water

Question 8

The definition of drought ??

Answer 8

No rain for a prolonged period of time / consistently low rainfall

Question 9

The definition of wildfire ??

Answer 9

Fire occur in woodland which spreads fast and is difficult to control

Question 10

The definition of Landslide ??

Answer 10

Quick / fast downward slide of slope materials

Question 11

What are the features of Hong Kong’s relief ??

Answer 11

Hilly 60% of its land is natural slope and there are only a few flatland

Question 12

What are the locations of the few flatland in hk ?? Name 2

Answer 12

1. North western part of new territories
2. Along the coast of Victoria Harbour

Question 13

Where are the highest hills located in hk?? How tall is it ??

Answer 13

They are located in Tai ho sham they are 957 meters tall

Question 14

What are the 4 reasons of landslide ?? Explain each one

Answer 14

1. Heavy Rainfall : rainwater seeps into the solid which increases the burden of the soil which means the cohesion and friction is low
2. Less vegetation : rainwater seeps into the solid which increases the burden of the soil which means the cohesion and friction is low
3. Rock type : With granite being the most common rock type in hk it is very prone to weathering because of its joints leading it to break up and dissolve into loose weathered materials causing landslide
4. Development activities : The cutting and filling of the slope destroys the base structure and increase the burden of the slope

Question 15

What are the impacts of landslide ??

Answer 15

1. Loss of life and property: as the mud will bury the building near the slope
2. Traffic congestion: the mud will bury the road surface
3. Damage to the water pipes and electricity cables

Question 16

Prevention of landslides . Name 4 ways

Answer 16

1. Drainage channels
2. Concrete covers
3. Soil nails
4. Retaining wall

Question 17

What does drainage channel do ??

Answer 17

To drain the rainwater
⬇️ amount of rainwater that seeps into the slope

Question 18

What does concrete cover do ??

Answer 18

To prevent rocks from falling down
Prevent infiltration of rainwater

Question 19

What does soil nails do ??

Answer 19

Reinforce the slope
⬆️ slope stability

Question 20

What does retaining wall do ??

Answer 20

It prevents water from infiltrating into soil
Support the slope

Question 21

What are the other 3 methods of preventing landslide ??

Answer 21

1. Regulation of slope development
   Meaning all construction projects have to be approved by GEO
2. Establishing warning signs
   The hk observatory and GEO will issue warning signs to aware ppl to stay away from slope during high rainfall or storms
3. Public education
   Government will promote slope safety and organise public education activities