PPSC Everyday Science focus: Which planet is known as the Red Planet?
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Iron oxide minerals give Mars its reddish appearance.
The planet has polar ice caps and a thin atmosphere.
Practice PPSC Everyday Science questions with answers and explanations.
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Iron oxide minerals give Mars its reddish appearance.
The planet has polar ice caps and a thin atmosphere.
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Jupiter is the largest planet by mass and diameter.
It is a gas giant with a powerful magnetic field.
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Saturn's rings contain ice and rocky particles.
Other giant planets also have fainter ring systems.
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Tectonic stress builds in Earth's crust.
When rocks slip, seismic waves spread from the rupture.
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A seismograph detects and records vibrations of the ground.
The resulting record is called a seismogram.
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The focus is the underground rupture origin.
The epicenter is its surface projection.
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Undersea earthquakes, landslides, or eruptions can displace large water volumes.
The resulting waves can grow near coastlines.
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Volcanoes connect Earth's surface with molten or gaseous material below.
Eruptions vary from gentle lava flows to explosive ash events.
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Magma is molten rock below the surface.
Once erupted, it is called lava.
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Igneous rocks crystallize from magma or lava.
Granite and basalt are common examples.
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Layers of sediment become compacted and cemented.
Sandstone and limestone are examples.
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Metamorphism alters rock minerals and texture without complete melting.
Marble forms from limestone.