HOW ARE CAVES FORMED? FIND OUT MORECaves are hollow spaces carved into hillsides or underground by the action of water and the wind. On coasts, pounding waves sometimes hollow out caves in the…
CLIMATE ZONE CLASSIFICATIONWHAT IS A MICROCLIMATE? HAS THE EARTH’S CLIMATE CHANGED OVER TIME? WILL EARTH’S CLIMATE CHANGE IN THE FUTURE? BIOGRAPHY: LOUIS AGASSIZ Swiss, 1807–1873FIND OUT MOREEarth…
WHAT AFFECTS AN AREA’S CLIMATE? WHY DO TROPICAL REGIONS HAVE HOT CLIMATES? WHAT IS A CONTINENTAL CLIMATE? FIND OUT MORE
Every part of the world has its own climate—a characteristic…
HOW DO WAVES CHANGE COASTAL LANDSCAPES? TIDESFIND OUT MORECoasts are border zones where the land meets the ocean. There is about 312,000 miles (502,000 km) of coastline worldwide. TIDES, waves,…
HAVE EARTH’S CONTINENTS ALWAYS LOOKED THE SAME?WHY DO EARTH’S CONTINENTS MOVE? BIOGRAPHY: ALFRED LOTHAR WEGENER GERMAN, 1880–1930 TECTONIC PLATESFIND OUT MOREDry land covers just under one-third of…
WHAT CAUSES EARTHQUAKES? WHAT HAPPENS DURING AN EARTHQUAKE? WHERE DO MOST EARTHQUAKES STRIKE? HOW ARE EARTHQUAKES MEASURED? FIND OUT MOREEarthquakes are vibrations triggered by sudden rock…
WHAT IS FUEL? FOSSIL FUELSNUCLEAR ENERGYRENEWABLE ENERGYFIND OUT MOREEnergy is the force that makes things work. Over many years, people have learned to produce energy from various sources, such as…
HOW DOES EROSION HAPPEN? LANDSLIDESFIND OUT MOREErosion is the wearing down and the carrying away of the Earth’s rock by the action of wind and moving water. Erosion happens fastest on steep…
WHICH KINDS OF ANIMALS ARE DOMESTICATED? HOW HAVE MODERN CROPS BEEN DEVELOPED? WHAT ARE STAPLE FOOD CROPS? WHERE IS RICE GROWN? MECHANIZED FARMING WHAT IS ORGANIC FARMING? FIND OUT MOREThousands…
WHAT IS OVERFISHING? WHAT METHODS ARE USED BY THE FISHING INDUSTRY? FIND OUT MOREFish are an important food, so fishing is a major industry in many countries. However, overfishing has resulted in…
