Fast Land Changes

What happens during a land slide?

• Magma moves up from the mantle and erupts
• large pieces of land break off and slide down
• the ground freezes and melts when it's warmer
• water in streams and rivers overflow the banks

Why can floods be helpful?

• they form new islands in the ocean
• they make the Earth's mantle stronger
• they damage many roads and homes
• they can bring rich soil to the area

What is melted rock from the mantle called after it has erupted from a volcano and reached the surface?

• plate
• magma
• lava
• crust

what can cause earthquakes?

• Heavy rains make rivers overflow their banks
• tectonic plates push and slip past each other
• strong winds can push apart pieces of land
• waves travel across the sea and break apart on land

Many volcanoes are EXTINCT and will never erupt. Which word is similar to EXTINCT?

• alive
• dead
• warm
• lava

Which sentence about volcanoes is FALSE?

• volcanoes give rich soil that is good for farming
• volcanoes can erupt and form islands
• volcanoes can erupt and spit ash, molten rock and gases
• volcanoes are all active and can erupt at any time

Both magma and lava are molten rocks. How are they different?

• lava is very cold and hard, magma is very hot
• magma is underground and lava is on the surface
• lava flows to the mantle and magma flows to the crust
• magma can cool to form hills but lava can not form hills

What happens FIRST?

• The wave travels across the sea and gets bigger
• the earthquake causes a big wave to form
• an earthquake occurs in the middle of the sea
• a big wave hits a coast and causes flooding

Which sentence about tectonic plates is TRUE?

• they lay on top of the continents and the oceans
• earthquakes happen when they slip against each other
• there are 5 major tectonic plates and 2 minor
• the tectonic plates are part of the earth's center core

Sometimes during a storm, water can rise up very quickly and cause a flood. What do you think this type of flood is called?

• gradual flood
• flash flood
• lazy flood
• wet flood