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Eighth Grade (Grade 8) Geology Questions

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Grade 8 Historical Geology
Order the divisions of geological time from the longest to the shortest.
  1. epochs, periods, eras, eons
  2. eons, epochs, eras, periods
  3. periods, epochs, eras, eons
  4. eons, eras, periods, epochs
Grade 8 Earth's Layers
Earth's inner core is composed of mainly of                      .
  1. molten rock
  2. solid iron and nickel
  3. heated gases
  4. none of these
Grade 8 Soil
What determines a soil's texture?
  1. water content.
  2. mineral composition.
  3. thickness.
  4. particle sizes.
Grade 8 Tectonics
New ocean crust is formed at
  1. divergent boundaries.
  2. convergent boundaries.
  3. continental volcanic arcs.
  4. transform fault boundaries.
Grade 8 Tectonics
What is earthquake intensity?
  1. a measure of energy released
  2. a measure of seismic risk
  3. a measure of damage
  4. a measure of an earthquake's focus
Grade 8 Historical Geology
The image shown could best be used for which purpose?
Geologic Cross Section 2
  1. relative dating
  2. absolute dating
  3. radiometric dating
  4. paleomagnetic dating
Grade 8 Historical Geology
Which of the following does not describe the second mass extinction?
  1. half of all animal and plant life died
  2. dinosaurs became extinct
  3. the primordial ooze occurred
  4. the Sun was blocked and much plant life died, resulting in many animals dying
Grade 8 Tectonics
What measures an earthquake's magnitude?
  1. Mercalli scale
  2. Interval scale
  3. Richter scale
  4. Ratio scale
Grade 8 Soil
Which layer contains the oldest fossils?
  1. Layer 1
  2. Layer 2
  3. Layer 3
  4. Layer 4
Grade 8 Earth's Layers
Which of the following does NOT play a role in mantle convection?
  1. gravity
  2. density
  3. temperature
  4. magnetism
Grade 8 Tectonics
The                 is where about 80% of earthquakes occur.
  1. Antarctic Plate
  2. Ring of Fire
  3. Hot Spot
  4. Epicenter
Grade 8 Historical Geology
When did geologic time begin?
  1. about 4.6 million years ago
  2. about 4.6 thousand years ago
  3. about 4.6 years ago
  4. about 4.6 billion years ago
Grade 8 Tectonics
What is the hypothesis that continents have slowly moved to their current locations?
  1. magnetic reversal
  2. continental drift
  3. continental slope
  4. convection
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