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science 8 > section 1 > Flashcards

section 1 Flashcards

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1
Q

Chemical Bonding

A

The combining of atoms to form molecules or ionic compounds.

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2
Q

Chemical Bond

A

An interaction that holds atoms or ions hold together.

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3
Q

Valence Electron

A

An electrons that is found in the outermost shell of an atom and that determines the atoms chemical property.

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4
Q

Section

A

2

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5
Q

Ionic Bond

A

A bond that forms when electrons are transferred from one atom to another witch results in a positive ion and negative ion.

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6
Q

Ion

A

A charged particle that forms when an atom or groups of atoms gains or losses one or more electrons.

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7
Q

Crystal Lattice

A

The regular pattern in witch a crystal is arranged.

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8
Q

Section

A

3

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9
Q

Covalent Bond

A

A bond formed when atoms share one or more pairs of electrons.

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10
Q

Molecule

A

The smallest unit of a substance that keeps all of the physical and chemical properties of a substance.

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11
Q

Metallic Bond

A

A bond formed by the attraction between positively charged metal ions and the electrons around them.

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12
Q

Motion

A

1

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13
Q

terminal velocity

A

the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration

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14
Q

free fall

A

downward movement under the force of gravity only

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15
Q

projectile motion

A

a curved path under the action of gravity only. The only force of significance that acts on the object is gravity, which acts downward to cause a downward acceleration.

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16
Q

Section 2

A

h

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17
Q

inertia

A

a tendency to do nothing or to remain unchanged.

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18
Q

Section 3

A

h

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19
Q

momentum

A

the quantity of motion of a moving body, measured as a product of its mass and velocity.

20
Q

Chapter 3

A

h

21
Q

Section 1

A

h

22
Q

fluid

A

a non solid state of matter in witch atoms or moles are free to move past each as in a gas or liquid

23
Q

pressure

A

the amount of force exerted on a force area of a surface

24
Q

pascal

A

the SI unit of pressure

25
Q

atmospheric pressure

A

the pressure caused by the weight of the atmosphere

26
Q

Section 2

A

h

27
Q

buoyant force

A

the upward force exerted by any fluid upon a body placed in it compare Archimedes’ principle.

28
Q

Archimedes Principal

A

the law that a body immersed in a fluid is buoyed up by a force (buoyant force) equal to the weight of the fluid displaced by the body

29
Q

Section 3

A

h

30
Q

Bernoulli principal

A

the principle in hydrodynamics that an increase in the velocity of a stream of fluid results in a decrease in pressure.

31
Q

Thrust

A

the pushing or pulling force exerted by the engaine of a aircraft

32
Q

Pascals principal

A

law or the principle of transmission of fluid-pressure (also Pascal’s Principle) is a principle in fluid mechanics

33
Q

Chapter 5

A

h

34
Q

energy

A

the capacity to do work

35
Q

kinetic energy

A

the energy of an object that is due to the objects motion

36
Q

potential energy

A

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

37
Q

mechanical energy

A

is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.

38
Q

Section 2

A

h

39
Q

energy converstion

A

a principle in physics: the total energy of an isolated system remains constant irrespective of whatever internal changes may take place with energy disappearing in one form reappearing in another.

40
Q

Section 3

A

h

41
Q

friction

A

the resistance that one surface or object encounters when moving over another.

42
Q

law of conservation of energy

A

The law of conservation of energy is a law of science that states that energy cannot be created or destroyed, but only changed from one form into another or transferred from one object to another.

43
Q

Section 4

A

h

44
Q

nonrenewable recorce

A

Non-renewable resources are resources for which there is a limited supply. The supply comes from the Earth itself and, as it typically takes millions of years to come

45
Q

fossil fuel

A

a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.

46
Q

renewable recorce

A

renewable resource definition. Any resource, such as wood or solar energy, that can or will be replenished naturally in the course of time.

science 8 (1 decks)

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