Questions: The image below represents a sediment core that a research team collected from a lake floor. They divided the sediment into five equally sized layers. Drag and drop each label on to the image to most accurately describe four of the five layers. Labels Drop Zones Reset All

The image below represents a sediment core that a research team collected from a lake floor. They divided the sediment into five equally sized layers. Drag and drop each label on to the image to most accurately describe four of the five layers. Labels Drop Zones Reset All
Transcript text: The image below represents a sediment core that a research team collected from a lake floor. They divided the sediment into five equally sized layers. Drag and drop each label on to the image to most accurately describe four of the five layers. Labels Drop Zones Reset All
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Solution

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Solution Steps

Step 1: Analyze the information given in the image

The image represents a sediment core with 5 layers. The top layer is the shallowest and the bottom layer is the deepest. Carbon-14 is a radioactive isotope that decays over time. Therefore, older sediment layers will have lower carbon-14 levels and lower carbon-14 to carbon-12 ratios.

Step 2: Match the labels to the appropriate layers
  • Shallowest: This label corresponds to the topmost layer of the sediment core.
  • Deepest: This label corresponds to the bottommost layer of the sediment core.
  • Second highest carbon-14 level: The highest carbon-14 level will be in the shallowest layer. Therefore, the second-highest level will be the second layer from the top.
  • Second oldest sediment layer: The oldest layer is at the bottom. Therefore, the second oldest layer will be the second layer from the bottom.
  • Highest carbon-14 to carbon-12 ratio: This corresponds to the shallowest layer, which has the most recent sediment.
  • Lowest carbon-14 to carbon-12 ratio: This corresponds to the deepest layer, which has the oldest sediment.
Step 3: Connect labels to image segments
  • Second highest carbon-14 level: Second layer from the top.
  • Lowest carbon-14 to carbon-12 ratio: Bottom layer (Deepest).
  • Highest carbon-14 to carbon-12 ratio: Top layer (Shallowest).
  • Second oldest sediment layer: Second layer from the bottom.

Final Answer

  • Top Layer (Shallowest): Highest carbon-14 to carbon-12 ratio
  • Second Layer from Top: Second highest carbon-14 level
  • Third Layer from Top: (No label)
  • Second Layer from Bottom: Second oldest sediment layer
  • Bottom Layer (Deepest): Lowest carbon-14 to carbon-12 ratio
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