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Year 7 and 8 Science End of Year Exams > Parallel Circuits > Flashcards

Parallel Circuits Flashcards

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1
Q

What is a parallel circuit?

A

A parallel circuit is way of connecting components on separate branches, so the current can take different routes around the circuit.

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2
Q

What is a series circuit

A

A series circuit has all the components in one loop connected by wires, so there is only one route for current to flow.

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3
Q

what is potential difference

A

how much energy the electrons carry around the circuit

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4
Q

how can you measure potential differnce

A

voltmetre

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5
Q

what is voltage

A

an electromotive force

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6
Q

what are the units for potential differenc meausred in

A

Volts

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7
Q

what is electricity

A

a fow of electrons around a circuit

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8
Q

what are the different wires called

A

live wire, neutral wire and earth wire

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9
Q

what is a magnetcic field

A

area around a magnet where there is magnetic force

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10
Q

what is a stem cell

A

is a cell that hanst differentiated yet

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10
Q

what metals are magnetic

A

iron, cobalt and nickel

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11
Q

how many neuarons make up a human brain

A

86 billion

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12
Q

what is a neuron

A

a nerve cell

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13
Q

what is the cerebal cortex

A

the outer layer of the cerebrum it is the centre of conscious thought

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14
Q

what is the cerebal corext didvided into to

A

into cerebal hemipsheres each with different functions

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15
Q

is selma shuts her left eye which side brain is she using

A

right brain

16
Q

what is the spinal cord

A

consists of many nerves that carry information between the brian and the rest of the body

17
Q

what does cns stad for

A

central nervous system

18
Q

what makes up the CNS system

A

the brain and the spinal cord nerves and sense organs

19
Q

what is a sense organ

A

receptor cells that sense surroundins

20
Q

how many bones are in the body

A

206 bones

21
Q

what does the retina contain

A

rod and cone cells

22
Q

what is the cornea

A

a clear coverign around the pupil

23
Q

what is a pupil

A

the hole through the iris

24
Q

what is the iris

A

a coloured ring

25
Q

what does the optic nerve do

A

transfers visula information from the retina to the brain via electrical impulses

26
Q

what is an electrical impulse

A

a wave of electrical activity that passes from one end of a nerve cell to another

27
Q

how many rods and cone cells are in a human retina

A

120 million rods, 6 million cones

28
Q

what is the eye

A

a sense organ

29
Q

what is an antagonisitc muscle

A

pair of muscles that act against each other

30
Q

what is a agonisitc muscle

A

a muscle whose contractionmoves a part of the body directly

31
Q

what happnes to the bone when tit contracts

A

it gets short and fat

32
Q

what does voluntary muscles mean

A

they only work when you tell them to

33
Q

what does involuntary muscles mean

A

our contracting muscles are automatic

Year 7 and 8 Science End of Year Exams (23 decks)

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