Hawaii is a very big island. 
Hawaii is a very big island. 
The island is made of five volcanoes.
When lava flows, the island grows. 
You can see black sand on some beaches.
Many people live on this island. It is a grand place to visit!
Hawaii is the largest island in the United States. 

The island was made by five shield volcanoes.
Because some volcanoes are active, the island is growing. Hot lava flows out and adds new land. 
The island of Hawaii is the largest island in the United States. 

This land was built by five shield volcanoes that erupted one after another. 
Legendary stories tell us how the island got its name. Some say a Polynesian navigator named Hawaiiloa discovered it. Other stories link the name to Hawaiki, a realm of gods or a home for spirits. People may have first arrived from the Marquesas or Society Islands. Some studies say they arrived around the 3rd century AD. Other research suggests they arrived between 900 and 1200 AD. Long ago, a leader named Umi-a-Līloa united the island. 
In 1779, Captain James Cook arrived at Kealakekua Bay. 

Because the volcanoes are active, the island is actually growing.
The island of Hawaii is the largest island in the United States. 

Geologically, the island was built by five separate shield volcanoes. A shield volcano is a wide volcano with gentle slopes. These volcanoes erupted in a sequence, with each one overlapping the previous one. The oldest is the extinct Kohala volcano. Next is Mauna Kea, which is currently dormant. Mauna Kea is a remarkable feature of the island. If you measure from its base on the sea floor to its peak, it is the tallest mountain in the world. This makes it taller than Mount Everest.
Because Mauna Loa and Kīlauea are active, the island is constantly growing. When lava flows from these volcanoes, it adds new land to the island. This process can be destructive to human settlements. For example, lava from Kīlauea destroyed the town of Kapoho in 1960 and again in 2018. In 2018, a major eruption at Fissure 8 added 875 acres of land. This eruption also covered Green Lake and parts of Isaac Hale Beach Park. 
Human history on the island is tied to both legend and archaeology. Some believe the island was named after a Polynesian navigator named Hawaiiloa. Other accounts link the name to Hawaiki, a legendary realm of gods or ancestors. While the exact date of discovery is uncertain, some studies suggest settlers arrived as early as the 3rd century AD. Other research places the first settlers between 900 and 1200 AD. 
European contact changed the course of the island's history. In 1779, Captain James Cook anchored in Kealakekua Bay. 
The island's geography also includes significant seismic activity. Earthquakes and tsunamis are part of life on the island. In 1868, a massive earthquake rocked the southeast coast. This event triggered a landslide on Mauna Loa and a deadly tsunami. The tsunami reached inland distances of 400 meters in some places. Other tsunamis have arrived from distant events, such as earthquakes in Alaska in 1946. In 1975, a section of the Hilina Slump slid toward the ocean. This movement caused a 7.2 magnitude earthquake and a tsunami. The Hilina Slump is a section of Kīlauea's south slope that is moving away from the island.
Today, the island remains a place of intense geological study. The United States Geological Survey monitors volcanic activity closely. They use codes, such as code orange, to signal eruptions. These eruptions can produce tephra, which are hot glassy volcanic fragments. They can also create lava fountains that shoot high into the air. 
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