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Science exam revision year 9 > Physics > Flashcards

Physics Flashcards

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1
Q

what is heat?

A

heat is the transfer of thermal energy from one thing to another thing

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2
Q

what is the particle model?

A

the particle model is a scientific theory that explains the properties of solids, liquids, and gases.

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3
Q

what is temperature?

A

temperature is the measure of the average kinetic energy of particles in an object

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4
Q

what are the different temperature scales?

A

their is Fahrenheit , Celsius, and kelvin

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5
Q

what do they boil at?

A

F boils at 212 F, C boils at 100º, and K boils at 375 K

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6
Q

What do they freeze at?

A

F freezes at 32 F , C freezes at 0º, and K freezes at 273 K

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7
Q

what is conduction?

A

conduction is where heat moves from one object to another through touch

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8
Q

what is convection?

A

Convection is where heat moves through liquid or air

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9
Q

what is radiation?

A

radiation is energy that travels at the speed of light

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10
Q

what are conductors?

A

conductors are a material that allows electricity to flow through them

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11
Q

what are insulators?

A

insulators are materials that do not allow electricity to flow through them.

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12
Q

what are transverse waves?

A

transverse waves motion in which points on a wave move horizontally

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13
Q

what are longitudinal waves?

A

longitudinal waves are waves that move in the same direction of the wave.

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14
Q

how do sound waves travel?

A

they travel by using diagrams to omit through objects such as sound, air and wood

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15
Q

what does SONAR stand for?

A

it stands for sound navigation and ranging.

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16
Q

what unit measures frequency?

A

hertz

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17
Q

what are the semi circular canals in your ears used for?

A

to regulate balance for your head

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18
Q

what are the properties in light?

A

they include intensity, propagation, direction, frequency, wavelength spectrum, and polarisation.

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19
Q

what is a luminous object?

A

an object that emits its own light.

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20
Q

what is the law of reflection?

A

The law of reflection is that the incident ray, the reflected ray, and the normal surface of the mirror all lie within the same plane.

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21
Q

what is lateral inversion?

A

Lateral inversion in plane mirrors is the reversal of mirror images when the right side of the object is on the left side behind the mirror.

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22
Q

how is a real image formed?

A

A real image is formed by the actual intersection of light rays

23
Q

how is a virtual image formed?

A

A virtual image is formed by the imaginary intersection of light rays.

24
Q

what is reflection?

A

Reflection is the throwback of a body, surface, heat, light or sound without absorbing it.

25
Q

how does refflection work?

A

Reflection occurs when light traveling through one material bounces off of another material.

26
Q

what is total internal reflection?

A

Total internal reflection is the complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium.

27
Q

what are concave lenses?

A

Concave lenses have a curved inside surface to magnify objects.

28
Q

what are convex lenses?

A

Convex lenses are thicker at the centre and thinner at the edges allowing for a focal point.

29
Q

what are longtitudinal waves?

A

longitudinal waves are waves where particle motion is in the same direction in which the waves are propagating.transverse waves move side to side.

30
Q

what are transverse waves?

A

transverse waves are waves that motion along all points on a wave oscillate along paths at right angles.transverse waves move up and down.

31
Q

where is the crest?

A

the higher surface of the wave

32
Q

where is the trough?

A

the lowest part of the wave

33
Q

what is amplitude?

A

the maximum amount of displacement of particles from its rest position.

34
Q

what is frequency?

A

the number of waves that pass a fixed point in time.

35
Q

what is wavelength?

A

the distance of the waves shape and when it repeats

36
Q

what is the rest position?

A

the middle line in and out of a wave

37
Q

high energy waves

A

have a higher amplitude

38
Q

low energy waves

A

have a smaller amplitude

39
Q

what are electromagnetic waves?

A

electromagnetic waves are generated naturally in our upper atmosphere and from our stars, including the sun.

40
Q

what do electromagnetic waves consist of?

A

electromagnetic waves consist of oscillating electric and magnetic fields travelling t the speed of light (300,000,000m/s)

41
Q

transverse waves

A

when the coil moves perpendicular to the waves it is called a transverse waves

42
Q

longitudinal waves

A

when the coils move from left to right, the wave is called a longitudinal wave.

43
Q

What are AM and FM?

A

AM and FM waves are radio stations.

44
Q

AM?

A

amplitude modulation is where the signal is used to change or modulate the amplitude of the carrier wave.

45
Q

FM?

A

frequency modulation where the signal is used to change the frequency of the carrier wave.

46
Q

What is plasma?

A

Plasma is a heated up gas, that has electrons in it.

47
Q

what is the visible spectrum?

A

Visibler spectrum is the range of colours that can be seen by the eye.

48
Q

what are the primary colours?

A

Primary colours (blue, red, green) are used to make White light.

49
Q

what are the secondary colours?

A

secondary colours( magenta, yellow, and cyan) make white light aswell.

50
Q

what is colour blindness?

A

Colour blindness is when cones in the retina of the eye that detects colour ( red, blue, and green) do not work correctly (generic, inherited)

51
Q

how do polarised sunglasses work?

A

Polarised sunglasses, work because they are coated in a material that reduces light glaire, that also allows the light to be reflected away making you see better.

52
Q

what is dispersion?

A

dispersion is when white light passes through a prism and spits into colours in a visible spectrum.

53
Q
A

Science exam revision year 9 (2 decks)

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