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Praxis Elementary Education > Science: Physical Science > Flashcards

Science: Physical Science Flashcards

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1
Q

Atoms with:

More protons than electrons are called:

More electrons than protons are called:

A

Cations

Anions

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2
Q

Locations:

Protons
Neutrons
Electrons

A

Protons - nucleus
Neutrons - nucleus

Electrons - orbit the nucleus

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3
Q

Atomic mass =

A

Protons + neutrons

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4
Q

Atomic number =

A

Number of protons in nucleus

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5
Q

Two or more atoms joined together

A

Molecule

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6
Q

Atoms share one or more valence electrons

A

Covalent bond

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7
Q

Chemical bond that involves the attraction btwn two ions with unlike charges

A

Ionic bond

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8
Q

Loosely packed molecules-can change shape but not volume

A

Liquids

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9
Q

Molecules widely dispersed - change both shape and volume

A

Gas

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10
Q

Contains freely moving charged particles, but overall charge is neutral

A

Plasma

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11
Q

Liquid to gas:
Gas to liquid:
Solid to gas:
Gas to solid:

A

Liquid to gas: evaporate
Gas to liquid: condensation
Solid to gas: sublimation
Gas to solid: deposition

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12
Q

Substances combined without a chemical reaction

When distribution is uniform (salt water) the mixture is called:

A

Mixture

Solution

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13
Q

Chemical reaction: energy ( heat is released):

Chemical reaction: energy is required for the reaction to take place

A

Exothermic

Endothermic

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14
Q

Chemical change substance loses electrons when exposed to oxygen ( iron rusts)

A

Oxidation

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15
Q

Chemical reaction that produces heat, carbon dioxide and water

A

Combustion

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16
Q

Two substances combine to form a single substance

A

Synthesis

17
Q

Chemical reaction in which a single substance is broken down into two or more substances

A

Decomposition

18
Q

Chemical reaction when an acid and a base react to produce a salt and a water

A

Neutralization

19
Q

_ stays the same wherever the object is located ( ex: earth and moon)

A

Mass

20
Q

Mass divided by volume =

Amount of space the object occupies

A

Density

21
Q

Amount of solute that will dissolve in a solvent

Poor conductors

A

Solubility

Insulators

22
Q

_ compounds that contribute a hydrogen ion when in a solution

_ compounds that contribute a hydroxide ion in a solution

A

Acid

Bases

23
Q

Speed =

A

Distance /time

24
Q

Vector measures:

2

A

Magnitude and direction

Displacement, velocity, acceleration

25
Q

Scale measures:

A

Magnitude only

26
Q

Measures shortest distance btwn initial and final locations of a moving point

A

Displacement

27
Q

Rate at which a an object changes position

Equation:

A

Velocity

Displacement/ time

28
Q

_ describes how quickly an object changes velocity

Equation:

A

Acceleration

Change in velocity/ time

29
Q

Newton’s 1st law

A

An object at rest stays at rest and an object in motion stays in motion unless acted on by a force

30
Q

Newton’s 2nd law

A

Force is equal to the mass of an object multiplied by its acceleration

F= ma

31
Q

Newton’s 3rd law

A

for every action there is an qual and opposite reaction

32
Q

Force that results from objects being pulled or hung

Upward force of object resting on another object

A

Tension

Normal force

Praxis Elementary Education (34 decks)

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