Forces that Change the Earth and Landforms Review

Forces that Change the Earth and Landforms Review 3rd Grade

Question 1 • Volcanoes create new land on the Earth’s surface when – • Lava cools and hardens to form rock • Magma forms giant underground chambers • Saltwater touches lava and forms steam

Answer • Lava cools and hardens to form rock Lava is molten rock. When it cools, it hardens into rock. This creates new land.

Question 2 • A landslide is a most likely caused by – • Strong winds • Breaking rocks • Heavy rains

Answer • Heavy rains • Heavy rains cause the soil to loosen. This may eventually cause it to slide downhill.

Question 3 • Which of the following best describes how an earthquake changes the Earth’s surface? • Throws rocks and ash into the air • Violently shifts the surface of the Earth • Forces lava through holes in the ground

Answer • Violently shifts the surface of the Earth • The shifting the of the surface of the earth by an earthquake can cause cracks in the ground.

Question 4 • Which event forces melted rock from deep in the earth towards the surface? • Earthquakes • Landslides • Volcanic eruptions

Answer • Volcanic eruptions • A volcanic eruption causes magma to erupt from underneath the surface of the Earth. Once the magma has erupted, it is called lava.

Question 5 • _____________________ is the movement of weathered rock and soil.

Answer • Erosion

Question 6 • A ________________ is an underwater earthquake.

Answer • Tsunami

Question 7 • A _______________ is the rapid movement of rocks and soil down a hill.

Answer • Landslide

Question 8 • ______________ is the process of rocks breaking down into smaller pieces.

Answer • Weathering

Question 9 • Funnel cloud is another name for a _____________________.

Answer • Tornado

Question 10 • ______________ are slow moving frozen rivers.

Answer • Glaciers

Question 11 • An opening in the earth’s crust from which lava flows is a ----

Answer • Volcano

Question 12 • A mound of earth with a rounded top which is smaller than a mountain is a ------

Answer • Hill

Question 13 • A thin natural waterway that allows water to flow into a lake or ocean is a -----

Answer • River

Question 14 • A thin strip of land that extends into a body of water is a -----

Answer • Peninsula

Question 15 • Low land between hills or mountains is called a -----

Answer • Valley

Question 16 • A large natural area of water surrounded by land is a -----

Answer • Lake

Question 17 • A large, tall rock that extends into the air which is larger than a hill is a -----

Answer • Mountain

Question 18 • A natural area of water that is mostly surrounded by land is a -----

Answer • Bay

Question 19 • An area of land that is completely surrounded by water is an -----

Answer • island

Question 20 • A large area of flat land or gently rolling land is a -----

Answer • Plain

Forces that Change the Earth and Landforms Review

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