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One usually visualizes such a vector simply as an arrow drawn on a plane or in a three-dimensional space.
Teacher strategy: Roo

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Dictionary definition: the quantity of motion of a moving body, measured as a product of its mass and velocity.
Learner definition:  is a product of mass and velocity.

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Her body continued its momentum down the hill and she fell, twisting so that she wouldn't fall on the kid.
Teaching strategy: Word walls

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Dictionary definition: A state in which opposing forces or influences are balanced.
Learner definition:  Is when opposite side are balanced and sum of all forces acting on an object equal to zero.

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When no current is passing through the coil and the magnetic field is of zero strength, the needles arrange themselves in positions of stable equilibrium under their mutual forces, pointing in.
Teaching strategy: Root words
The root "Equi"
meaning: same/equal

# data[].attributes.body
Dictionary definition: An influence tending to change the motion of a body or produce motion or stress in a stationary body. The magnitude of such an influence is often calculated by multiplying the mass of the body and its acceleration.
Learner definition: A force is a pull or push.

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The force applied caused an object to accelerate.
Teaching strategy: semantic maps.

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Dictionary definition: the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Learner definition:  is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction.

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It requires a radium salt of high radioactivity to be at all comparable in effectiveness with a good water-dropper.
Teaching strategy: semantic map

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Dictionary definition: the smallest unit of any chemical element, consisting of a positive nucleus surrounded by negative  electrons.
Learner definition: Atom is the smallest particle of matter.

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When an atom is charged, it becomes an ion.
Teaching strategy: Semantic maps

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The process of oxidation describes an oxygen reaction that produces a loss of electrons.
teaching strategy: morphemes
oxi- prefix meaning "presence of oxygen"

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Dictionary definition: Oxidation is the loss of an electron during a reaction by a molecule, atom or ion.
Learner definition: Oxidation is the process when oxygen combines with an element, changing the appearance of the element.

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Dictionary definition: a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
Learner definition: is a quantity that has both magnitude and direction.

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The exothermic oxidation reaction maintains the temperature of the re-burn tunnels.
Teacher strategy: synonyms and antonyms.

Exothermic releases energy in the form of heat or light.
Endothermic absorbs energy in the form of heat and light.

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Dictionary definition: noting or pertaining to a chemical change that is accompanied by a liberation of heat (opposed to endothermic).

Learner definition: releasing energy in the form of heat or light.

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When we calculate impulse, we are multiplying force by time.
Teaching strategies: semantic map

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Dictionary definition: A force acting briefly on a body and producing a finite change of momentum.
Learner definition: impulse is the product of the net force and the time interval for which the force acts.

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One usually visualizes such a vector simply as an arrow drawn on a plane or in a three-dimensional space.
Teacher strategy: Root word.

Latin word vector comes from the word vehere, which means "to carry,"

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Dictionary definition: The property of matter and radiation which is manifest as a capacity to perform work (such as causing motion or the interaction of molecules).
Learner definition:  energy is the ability to do work.

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We need to invest in clean, renewable energy.
Teaching strategy: semantic map