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Grade 07 Science - EC: S7.C.1.2.2

Grade 07 Science - EC: S7.C.1.2.2

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

7th Grade

Course, Subject

Science

Activities

  1. Why do solids have a fixed volume and shape?
  1. Explain how temperature affects particle motion in solids, liquids, and gases.

Look at the figures below to answer questions #2-3.

  1. What would happen to the shape and volume of a liquid if you move it from inside the square container to inside the circular container?

  2. Assume the containers were closed.  What would happen to the shape and volume of a gas if you move it from inside the square container to inside the circular container?
  1. Sound waves travel faster through a solid than they do through a liquid or a gas.  Why do you think this is true?  Support your thinking with facts about the particle motion in solids, liquids, and gases.

Answer Key/Rubric

  1. Acceptable responses may include, but are not limited to:

    • Solids have a definite volume.
    • Solids have a definite shape.
    • The particles of a solid are tightly packed together.
    • The particles of a solid are attached to other particles.
    • This allows the particles to vibrate, but not to more around.
  1. Acceptable responses may include, but are not limited to:

    • Increased temperature causes the particles in a solid to vibrate faster.
    • Decreased temperature causes the particles in a solid to vibrate more slowly.
    • Increased temperature causes the particles in a liquid and in a gas to move around more quickly.
    • Decreased temperature causes the particles in a liquid and in a gas to move around more slowly.
    • Increased temperature causes the volume of a gas to increase.

  2. Acceptable responses may include, but are not limited to:

    • Liquid has a definite volume.
    • Liquid does not have a definite shape.
    • A liquid will take the shape of its container.
    • In the square container, the liquid will fill the square shape.
    • In the circular container, the liquid will fill the circular shape.

  3. Acceptable responses may include, but are not limited to:

    • Gases do not have a definite volume.
    • Gases do not have a definite shape.
    • A gas will increase in volume to fill its container.
    • The particles of a gas will move around constantly to fill the space inside the container.
  1. Acceptable responses may include, but are not limited to:

    • The particles of a solid are tightly packed together.
    • The particles of a solid are attached to other particles.
    • Sound waves are compression waves.
    • Sound waves need to travel through matter.
    • The wave travels as energy is passed from particle to particle.
    • Since a solid’s particles are close together, they are constantly colliding and transferring energy.
    • The particles in a liquid do not collide as often.
    • The particles in a gas collide infrequently compared to the particles in a solid.
    • The sound relies on the collisions to travel.
    • Sound travels faster when there are more collisions between particles.
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