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Eighth Grade (Grade 8) Earth Science Questions

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Grade 8 Soil
The solid layer of rock beneath the soil is called
  1. bottom rock
  2. solid rock
  3. top rock
  4. bedrock
Grade 8 Volcanoes
Grade 8 Soil
Which lists the soil particles from largest to smallest?
  1. sand, gravel, clay, silt
  2. gravel, silt, sand, clay
  3. gravel, sand, silt, clay
  4. gravel, clay, sand, silt
Grade 8 Volcanoes
There are three different types of volcanoes. What two things determine the classification of volcanoes?
  1. shape and size
  2. shape and color
  3. shape and composition
  4. shape and texture
Grade 8 Environmental Science
Which of these could help to reduce air pollution?
  1. recycling
  2. mining
  3. burning fossil fuels
  4. driving a car
Grade 8 Atmosphere
What statement can clearly explain the basic reason for the Earth's seasons:
  1. As the sun moves away from Earth the seasons will change
  2. As the Earth revolves around the sun, the seasons change
  3. As the Earth revolves around the sun, the Earth's tilt will result in either the northern or southern hemisphere getting more exposure from the direct rays of the sun
  4. none of these are true
Grade 8 Soil
Which of the following makes A-Horizon ideal for growing plants?
  1. carbonic acid
  2. humus
  3. organic matter
  4. rocks
Grade 8 Volcanoes
Where do most volcanoes occur?
  1. divergent boundary
  2. transform boundary
  3. convergent boundary
Grade 8 Soil
How is soil made?
  1. weathering
  2. infiltration
  3. transpiration
  4. erosion
Grade 8 Volcanoes
Active volcanoes are most likely to form at
  1. transform fault boundaries
  2. divergent boundaries
  3. the center of continents
  4. convergent oceanic–continental boundaries
Grade 8 Volcanoes
What is expelled from volcanoes?
  1. lava
  2. steam
  3. rocks
  4. All the above
Grade 8 Soil
Which of the following statements about soil is most true?
  1. The deeper into the soil layers, the more rock appears.
  2. The deeper into the soil layers, the more organic matter.
  3. The more shallow the layer, the greater amount of rock appears.
  4. The deeper the soil layer, the more nutrients.
Grade 8 Soil
Soil is a mixture of
  1. decayed organic matter and oxygen
  2. weathered rock and water
  3. mineral fragments
  4. all answers are correct
Grade 8 Rocks
Fossils are found mainly in which type of rocks?
  1. igneous
  2. sedimentary
  3. metamorphic
Grade 8 Tectonics
What was Wegener's idea that the continents slowly moved over Earth's surface?
  1. Pangaea
  2. Continental drift
  3. Plate tectonics
  4. Fossils
Grade 8 Soil
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