Causes of Floods

Which of the following words are natural disasters?

• Flood

• Earthquake

• Airplane crash

• Typhoon

Which of the following are included as causes for floods in the reading passage?

• Melting snow

• Poorly built roads

• Large lakes

• Droughts

How does deep snow cause flooding?

• Freezing water causes flooding

• Sudden warm temperatures combined with heavy rains causes flooding

• Too much rain causes flooding

• Melting snow causes flooding

A broken human-made dam is compared to what?

• A broken ice dam

• Overflowing

• A tsunami

• A tidal wave

Which of the following best describes how a frozen river can cause a flood?

• The water behind the ice dam collects and when the dam breaks, it causes flooding upstream.

• The ice in the river cracks into piecesthat eventually create a dam causing the water to overflow.

• The ice in the river cracks causing the water to overflow.

• The ice in the river melts too quickly and causes a flood.

How far can dam water travel when it is unleashed from a broken dam?

• Tens of thousands of kilometres downstream

• Thousands of kilometres

• Tens of kilometres

• Less than 10 kilometres

Why does saturated ground contribute to flooding problems?

• It remains frozen

• The ground forms a kind of dam

• The ground is too hard, so the water runs off

• The ground cannot absorb more moisture

What kinds of problems can floods cause?

• The ability to predict floods

• Death

• Widespread damage

• Destruction of plants and animals

What is the most common natural disaster?

• Flood

• Fire

• Wind damage

• Rain

How does melting snow cause problems related to flooding?

• It makes the level of the river rise

• It causes pieces of ice to block the river

• It makes the water too cold

• It makes the rivers run too fast