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Grade 08 Science - EC: S8.C.3.1.2

Grade 08 Science - EC: S8.C.3.1.2

Continuum of Activities

Continuum of Activities

The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.

This continuum of activities offers:

  • Instructional activities designed to be integrated into planned lessons
  • Questions/activities that grow in complexity
  • Opportunities for differentiation for each student’s level of performance

Grade Levels

8th Grade

Course, Subject

Science

Activities

  1. Define kinetic energy and potential energy.

  2. Which is a form of kinetic energy?
    1. Electricity
    2. Dropping an egg
    3. Moving water and wind
    4. All of the above

  3. When potential energy increases, kinetic energy
    1. Remains the same
    2. Also increases
    3. Is not possible
    4. Decreases

  4. Create a T-chart and label the left side “Kinetic Energy” and the right side “Potential Energy”.  Correctly sort the given examples.
    1. Blowing wind
    2. Moving car
    3. Oil sitting in a barrel
    4. Food sitting on a plate
    5. Running dog
    6. Stagnant lake water

  5. Calculate the potential energy (PE) of a rock that weighs 50 Newtons that sits on a hill that is 200 meters high. You must show your work for full credit.

  6. A book weighing 2 Newtons is sitting on a shelf 2 meters from the ground.  Is the energy of the book potential energy or kinetic energy? Explain your answer. How many Joules is it? Show your work.

  7. Two rocks are being lifted by two different cranes. Rock one had a mass of 3 kilograms and is being lifted at a speed of 2.5 m/sec. Rock 2 had a mass of 3 kilograms and is being lifted at a rate of 3 m/sec.
    1. Which object has a greater kinetic energy value? Show your work AND explain your answer.
    2. Which object had more potential energy when it was lifted to a distance of 10 meters? Show your work AND explain your answer.

Answer Key/Rubric

  1. Kinetic energy is energy that is in motion. Potential energy is stored energy.

  2. D

  3. D

  4. Information should be sorted into the correct side of the T-chart, order does not matter.

  1. 50 Newtons x 200 meters = 1000 Joules

  2. Acceptable responses might include, but not be limited to:
    The book contains potential (stored) energy. It has 4 Joules (2 Newtons x 2 meters) of potential energy (P.E.).

  1. Acceptable responses might include, but not be limited to:
  1. Rock two has more kinetic energy. It has a kinetic energy value of 13.5 Joules compared to rock one which has a kinetic energy value of 9.375 Joules.
    • Rock one – 9.375 Joules = (3 x 2.52)/2
    • Rock two – 13.5 Joules = (3 x 32)/2
  2. Rock one and two have the same potential energy when lifted to a height of 10 meters. Both rocks have P.E. of 30 Joules.
    • Rock one - 30 Joules = (3 x 10)
    • Rock two - 30 Joules = (3 x 10)

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