Movement of plates produces cracks allow magma and gases to forced out during ____________ eruption.

____________ refers to the overflow of water over low-lying areas because of heavy rains and big sea waves.

If a place doesn't have rainfall or have much less rainfall than expected over a long time, it is called _____________.

A ____________ has a low pressure centre accompanied by strong winds, heavy rains, snow or hailstones.

There are hurricanes in USA, tropical cyclones in the UK, willy-willy in Australia and _______________ in Macao.

____________ is an unwanted fire that can damage vegetation in the countryside or a wilderness area.

Tornado, landslide, earthquake, and avian influenza are known as natural __________________.

Some natural hazards such as wildlife are not completely natural because they occur partly because of ___________ activities.

_______________ hazards are caused by extreme weather like long periods of little or very heavy rain. E.g. Typhoons, drought.

______________ hazards are caused by the movement of crustal plates such as earthquakes & volcanic eruption.

______________ hazards are caused by sudden and quick changes in the shape of land such as flooding & landslide.

______________ hazards are caused by the growth of undersirable micro-organisms, insects or other pests. E.g. Bird Flu.

The hot molten rocks under the Earth's crust is called ________________.

Once magma reaches the earth surface, it cools down and solidifies to become ___________ then volcanic rocks.

Hailstorms usually occur in the season of _____________.

Earthquakes happening under the sea may trigger a secondary hazard called __________________.

The most common rocks in Macao is called ____________.

_____________ happens there is a movement of a mass of rocks down a slope.

___________________ cloud is the only type of cloud that is capable of producing lightning, thunderstorms and tornadoes.