Drr

Question 1

• are natural phenomena that cause major problems around the world.
• While landslides come in various names such as mudslide, flash flood, avalanche, etc.
• Sinkholes, on the other hand, can occur on elevated or flat surfaces and can range from massive to barely noticeable which may leave a dent, a hole, or a body of water on the ground

Answer 1

Geological hazard

Question 2

is a ground movement on a sloping terrain. It does not happen on flat ground because of the angle on the ground, gravity induces the land to move downward

Answer 2

Landslide

Question 3

Types of landslides

Answer 3

Soil creep landslides
Slumping landslides
Debris flow landslide
Rock fall landslide

Question 4

is a very slow downslope movement of particles that occurs in every slope covered with loose, weathered material .

Answer 4

Soil creep landslides

Question 5

is a downward movement of rock debris, usually the consequence of removal of buttressing earth at the foot of a slope of unconsolidated material

Answer 5

Slumping landslides

Question 6

happens when the slope becomes saturated with water, this then triggers a landslide of watersoaked mass of rock and soil that slides down the slope

Answer 6

Debris flow landslide

Question 7

• are sudden slides caused by heavy rain the rock on the slope loosens and then slides down the slope

Answer 7

Rock fall landslide

Question 8

• a topographic depression created when groundwater dissolves the underlying limestone bedrock. Often known as “sink” or “doline, “ .
• Water from the rainfall seeps underneath the soil through the cracks and fissures.

Answer 8

Sinkhole

Question 9

Types of sinkhole

Answer 9

Cover collapse sinkhole
Cover subsidence sinkhole
Dissolution sinkhole
Artificial sinkhole

Question 10

• It develops suddenly (over an hour period) thus, causing catastrophic damage.

Answer 10

Cover collapse sinkhole

Question 11

It gradually grows where the sediment covers are permeable and contain sand

Answer 11

Cover subsidence sinkhole

Question 12

• It occurs in areas where calcareous is exposed on the ground or where thin layers of soil and permeable sand are also covered.

Answer 12

Dissolution sinkhole

Question 13

Such types of sinks may be caused by various human activities, including groundwater pumping and building

Answer 13

Artificial sinkhole

Question 14

Natural causes of landslides

Answer 14

Climate
Earthquakes
Weathering
Erosion
Volcanic eruption
Forest fire burns
Gravity

Question 15

Human causes of landslides

Answer 15

Mining activities
Clear cutting

Question 16

• are the most common and widespread damaging landslides in the Philippines, with an average of 20 typhoons each year due to……

Answer 16

Rainfall induced landslide

Question 17

Natural cause of sinkhole

Answer 17

Dissolution of sedimentary rocks

Question 18

Human cause of sinkhole

Answer 18

Underground water pumping

Question 19

5 parts of earthquake in the diagram

Answer 19

crust
epicenter
focus
fault line
tectonic plate

Question 20

Parts of a seismograph

Answer 20

wire
damping magnet
weight
rolling drum
pen
seismogram
tracing of vibration