What?
Clouds are made of water vapour.
What are clouds made of?
The hottest season is Summer.
When is the hottest season?
It takes 365 days for the earth to orbit the sun.
How long / many days does it take for the earth to orbit the sun?
The longest river in the world is the River Nile, in Egypt.
Where is the longest river in the world?
Air is 78 percent nitrogen gas, 21 percent oxygen and 1 percent other chemicals.
What is air made of?
Night-time is from sunset to sunrise. Every day starts precisely at midnight.
When is it 'night-time'?
The time it takes Earth to rotate on its axis so the sun appears in the same position in the sky, known as a solar day, is 24 hours.
How long does it take for the Earth to rotate on its axis.
All rivers have a starting point where water begins its flow. This source is called a headwater.
Where does a river start?
Generating power, cutting down forests and manufacturing goods are some of the causes of Climate Change.
What are the causes of Climate Change?
In about 5 billion years, the sun will run out of hydrogen.
When will the sun run out of hydrogen?
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals.
How do clouds form?
Antarctica is the windiest continent on Earth. Winds can sometimes reach up to 200 miles (322 kilometers) per hour for five hours per day.
Where is the windiest continent on Earth?
Too much rainfall over central China in July and August, 1931 caused the deadliest natural disaster in world history — the Central China floods of 1931.
What was the worst natural disaster in world history?
In 2010, a 7.0 magnitude earthquake struck Haiti, leaving its capital Port-au-Prince devastated.
When did a 7.0 magnitude earthquake strike Haiti?
Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas.
How are floods caused?
In the southern hemisphere, summer happens between December and February.
Where does summer happen between December and February?