**8.2 UNIT 2 SECOND QUARTER**

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**UNIT 2: MOTION**

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**II. UNIT 2: Motion**

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**Time:**

**Approximate Dates:**

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**Unit Introduction:**

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During this unit, students will be introduced to basic concepts about motion. Students will describe the motion of an object based on an object’s position, direction, and speed.

**Standards:**

- C22 Calculate the average speed of a moving object and illustrate the motion of objects in graphs of distance over time.
- C23 Describe the qualitative relationships among force, mass, and changes in motion.
- C24
Describe the forces acting on an object moving in a circular path.
- CINQ1 Identify questions that can be answered through scientific investigation.
- CINQ7
Identify and present relationships between variables in appropriate
graphs.

**CT State Grade Level Expectations
(Draft)**

**GRADE-LEVEL CONCEPT** **1**: u The motion of
an object can be described by its position, direction of motion and speed.

**GRADE-LEVEL EXPECTATIONS:**

1. An object is said to be in motion when its position
changes in relation to a point of reference.

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**GRADE-LEVEL CONCEPT 2:** u An unbalanced
force acting on an object changes its speed and/or direction of motion.

**GRADE-LEVEL EXPECTATIONS:**

**GRADE-LEVEL CONCEPT 3: ****u** Objects moving
in circles must experience force acting towards the center.

**GRADE-LEVEL EXPECTATIONS**:

**SCIENTIFIC
LITERACY TERMINOLOGY: **Motion, point of reference, speed, constant speed,
average speed, position-time graph,
slope, force, friction, gravity, inertia, mass, acceleration,
balanced/unbalanced forces, net force, circular motion

**Essential Questions:**

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- When is an object in motion?
- How do you know an object’s speed and velocity?
- How can you graph motion?
- What are Newton’s Laws of motion?

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**Essential Concepts:**

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- An object is said to be in motion when its position changes in relation to a point of reference.
- The meter is the SI unit of length.
- The speed of an object can be determined by dividing the distance the object traveled by the time it took to travel that distance.
- The velocity of an object is described by its speed and direction.
- A distance versus time graph can be used to analyze the motion of an object.
- Acceleration is defined as a change in an object’s speed or its direction.
- Inertia is an object’s tendency to resist a change in its motion. Inertia is Newton’s first law of motion.
- Force depends on an object’s mass and its acceleration. This is Newton’s second law of motion.
- When an object exerts a force on another object, the second object exerts a force on the first object of equal strength but in opposite direction. This is Newton’s third law of motion.
- Newton’s second law can be applied to a force causing an object to move in a circular path, but it is not a separate force. It is simply a known force – tension, friction, gravity – causing the circular motion.

** e. Essential Skills:**

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1. To identify and present relationships between variables using appropriate graphs.

**f. Vocabulary:**

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- Motion
- Reference Point
- International System of Units
- Meter
- Distance
- Speed
- Velocity
- Acceleration
- Force
- Friction
- Gravity
- Tension
- Compression
- Direction
- Mass
- Inertia
- Newton (N)
- Newton’s First Law of Motion
- Newton’s Second Law of Motion
- Newton’s Third Law of Motion

**Suggested Labs and Activities**

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**Reading For Information: Isaac
Newton**

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**Significant Task: Shipping and Sliding (Guided)**

**CMT Task ShippingAndSliding Teacher, Student,
Rubric**

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**Sample
Quarter 2 District Assessment,
Score Rubric**

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