Let's solve each question in the worksheet step by step and explain the answers.
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1. Earthquakes and volcanoes are ________________ that can make Earth change really ________________.
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Answer:
Earthquakes and volcanoes are
natural disasters that can make Earth change really
quickly.
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Explanation:
Both earthquakes and volcanoes are natural events caused by geological processes. They can rapidly alter landscapes, cause destruction, and change the Earth’s surface in a short amount of time.
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2. The top layer of Earth is called ________________.
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Answer:
The top layer of Earth is called the
crust.
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Explanation:
The Earth has several layers: crust, mantle, outer core, and inner core. The crust is the thin, solid outermost layer where we live. It's shown in the diagram as the green outer layer.
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3. When an earthquake happens the Earth ________________ back and forth.
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Answer:
When an earthquake happens the Earth
shakes back and forth.
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Explanation:
Earthquakes are caused by the sudden release of energy in the Earth’s crust, which creates seismic waves. These waves cause the ground to shake or vibrate.
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4. The Seismograph is an ________________ used to measure ________________.
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Answer:
The Seismograph is an
instrument used to measure
earthquakes (or
seismic activity).
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Explanation:
A seismograph is a scientific device that detects and records the motion of the ground during an earthquake. It produces a seismogram, which shows the intensity and duration of the quake.
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5. The crust looks like giant puzzle pieces called ________________.
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Answer:
The crust looks like giant puzzle pieces called
tectonic plates.
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Explanation:
The Earth’s crust is broken into large and small pieces known as tectonic plates. These plates float on the semi-fluid mantle beneath them and move slowly over time, causing earthquakes and volcanic activity at their boundaries.
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6. There are about ________________ tectonic plates around the ________________.
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Answer:
There are about
fifteen tectonic plates around the
world.
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Explanation:
Scientists estimate there are about 15 major tectonic plates, along with many smaller ones, that make up the Earth’s lithosphere. These plates are constantly moving due to convection currents in the mantle.
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✔ Final Answers:
1.
natural disasters,
quickly
2.
crust
3.
shakes
4.
instrument,
earthquakes (or
seismic activity)
5.
tectonic plates
6.
fifteen,
world
These answers help students understand basic concepts about earthquakes, Earth’s structure, and plate tectonics.
Parent Tip: Review the logic above to help your child master the concept of earthquakes worksheet pdf.
