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Science > Electricity Investigation > Flashcards

Electricity Investigation Flashcards

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Biology 101 flashcards
1
Q

what does Sonar stand for

A

SOund Navigation And Ranging

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2
Q

Use fo Sonar

A

Used to locate and detect shipwrecks and fish. Uses high frequency noises. Works by measuring time taken for noises to echo back to ship.

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3
Q

Echolocation

A

Used by animals to find prey and detect surroundings

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4
Q

Name the spectrums of the electromagnetic spectrum in order

A 
Radio waves
Infrared radiation
Visible light
Ultraviolet radiation 
X-rays
Gamma rays
Electromagnetic waves
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5
Q

Radio waves

A

Low energy waves

Used to communicate over long distances

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6
Q

Infra-red radiation

A

Created by all objects and sensed as heat

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7
Q

Visible light

A

Visible
Plants cant photosynthesis without it
Travels at 300 000 kilometres per second

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8
Q

Ultraviolet radiation

A

Needed by body to make vitamin D

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9
Q

X-rays

A

Enough energy to pass through flesh.

Produced when fast-moving electrons give up energy quickly. Happens when electrons hit a target made of tungsten

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10
Q

Gamma rays

A

Used to kill cancer cells and find weakness in metal.

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11
Q

Electromagnetic waves

A

Waves travel through air at 300 000 000m/s. Can travel in a vacuum.
Waves consist of repeating pattern of electric and magnetic forces, forces generated by by changes in speed/direction of moving electric charge

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12
Q

3 possible situations when light comes in contact with an object

A

Reflection, pass through, absorbed

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13
Q

Reflection

A

Light bounces off surface

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14
Q

Luminous

A

Produces own light

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15
Q

Scattering

A

Light reflects when inside the object

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16
Q

Transparent

A

Object where light can pass through

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17
Q

Translucent

A

Some light passes through but not all

18
Q

Opaque

A

No light can pass through material

19
Q

3 types of mirrors

A

Plain - straight
Concave - curved in
Convex - curved out

20
Q

Law of reflection

A

Light is reflected of surface at same angle it bounced onto

21
Q

Focal point

A

When parallel rays bounce of concave or convex mirror, their intersection point is known as the focal point

22
Q

Lateral inversion

A

Sideways reversal of images they you se when you look in a mirror

23
Q

Refraction

A

When light travels from a denser or less dense medium into another medium it bends

24
Q

Image

A

Picture seen in mirror or water

25
Q

Electric circuit

A

Pathway in which electricity passes through

26
Q

Static electricity

A

Doesn’t move

Only moves when enough has built up.

27
Q

3 essentials in electric circuits

A

Power supply
Load
Conductive path

28
Q

Power supply

A

Provides the electrical energy

29
Q

Load

A

Where electrical energy is converted to useful forms of energy

30
Q

Conductive path

A

Allows electric charge to flow around the circuit

31
Q

How batteries work

A

Stores chemical energy and is released into electrical energy when chemical reaction takes place

32
Q

Electric current

A

Flow of electric charge
Measure of amount of electric charge passing a particular point in circuit every second.
Defined as direction of movement of positive charge. Current caused by negatively charged energy

33
Q

Voltage

A

Measure of amount of electrical energy gained or lost by electrical charge as it moves through circuit.

34
Q

2 types of circuits

A

Parallel

Series

35
Q

Parallel circuit

A

Each component is connected in seperate conductive path.

Same voltage all around the circuit, current different all around

36
Q

Series circuit

A

Power supply, load and conductive path all in line

Same current all round the circuit, different voltage all round

37
Q

2 factors affecting speed of energy flow

A

Amount of energy each electron has.

Number of electrons passing through the globe every second

38
Q

Electrical insulator

A

Has a large energy resistence

39
Q

Factors affecting resistance

A

Type of material
Length of wire
Diameter or thickness of the wire
Temperature of the wire

40
Q

Resistance

A

Measure of how difficult it is for electrons to flow through part of a circuit.

41
Q

Variable resistor

A

Device in which resistance can be affected

42
Q

What is the electromagnetic spectrum

A

Range of wavelengths over which electromagnetic radiation extends

Science (12 decks)

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