Earth and its habitat

Which of the following is positive effects / advantages of a volcanic eruption?

a-Lava makes good soil

b-Ash covers building and crops.

c-Underground water in volcanic regions is hot enough to heat people's houses.

d- Tourists come to watch volcanoes erupting.

• a ,b, c , d

• a ,c

• b,c,d

• a,c,d

Volcanoes have advantages and disadvantages .

• True

• False

Quake means

Earthquakes happen when there are sudden movements of rocks in the Earth's.....................

The ................... is where the earthquakes begins inside the crust.

The worst damage at the surface is experienced immediately above the focus at a point called ...............................

• focus

• epicenter

• waves

• landslides

Earthquakes cause .......................... , which are when soil and mud slide down slopes.

A Tsunami s a huge ....................

The area along the border between the land and the sea is...........................area.

When a tsunami reaches a .............................. coastal area, the wave can reach a height of 50 metres.