BUILD Understanding

Name Class Date

BUILD Understanding Compare/Contrast Table Use a compare/contrast table when you want to see the similarities and differences between two or more objects or processes.

As you read Lesson 5, record the similarities and differences of freshwater and marine ecosystems in the chart below. An example has been provided.

Comparisons between Freshwater and Marine Ecosystems

Ecosystem Differences Similarities

Freshwater  shallow photic zone  Both have zones.

Marine  Photic zone may be up to 200 mdeep.

Marine Ecosystems Marine ecosystems are divided into regions or zones. These zones are based on depth of water and distance from shore. The open ocean is divided into two main zones according to light penetration: the photic and the aphotic zone. Follow the directions. 1. Find the photic zone in the diagram. Color it yellow. 2. Use these terms to label the marine zones: open ocean, intertidal zone, coastal ocean.

Answer the questions. 3. Which best describes the aphotic zone? A. the layer of the ocean where photosynthesis occurs B. the deep, dark area of the ocean C. the shore of the ocean D. the area from water surface down to 100 meters 4. Which ocean location would contain phytoplankton? A. aphotic zone C. ocean trench B. benthos D. photic zone