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Revision 2021 ( all unit test ) > science unit 3 > Flashcards

science unit 3 Flashcards

monday revision

1
Q

In series

A

If components in a circuit are on the same loop.

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2
Q

Field

A

The area where other objects feel an electrostatic force.

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3
Q

Current:

A

Flow of electric charge, in amperes (A).

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4
Q

In parallel

A

If some components are on separate loops.

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5
Q

Electromagnet

A

A non-permanent magnet turned on and off by controlling the current
through it

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6
Q

Electrons

A

Tiny particles which are part of atoms and carry a negative charge.

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7
Q

Charged up

A

When materials are rubbed together, electrons move from one surface to
the other

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8
Q

Negatively charged

A

An object that has gained electrons as a result of the charging process.

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9
Q

Electrostatic force

A

Non-contact force between two charged objects.

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10
Q

Positively charged

A

An object that has lost electrons as a result of the charging process.

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11
Q

The amount of energy shifted from the battery to the moving charge, or
from the charge to circuit components, in volts (V).

A

Potential difference

voltage

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12
Q 
A property of a component, making it difficult for charge to pass through,
in ohms (Ω).
A

Resistance

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13
Q

A material that allows current to flow through it easily, and has a low
resistance.

A

Electrical conductor

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14
Q

A material that does not allow current to flow easily, and has a high
resistance.

A

Electrical insulator

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15
Q

Resistance (Ω) = potential difference (V) ÷ current (A).

A

Resistance equation

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16
Q

A device for measuring potential difference (Voltage).

A

Voltmeter

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17
Q

A device for measuring current.

A

Ammeter

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18
Q

This relates the resistance of a component to its voltage and current.

A

Ohm’s law

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19
Q

Shows how food chains in an ecosystem are linked.

A

Food web

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20
Q

Part of a food web, starting with a producer, ending with a top predator.

A

Food chain

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21
Q

Ecosystem

A

The living things in a given area and their non-living environment.

22
Q

Environment:

A

The surrounding air, water and soil where an organism lives.

23
Q

Population

A

Group of the same species living in an area.

24
Q

Producer

A

Green plant or algae that makes its own food using sunlight

25
Q

Consumer

A

An animal that eats other animals or plants.

26
Q

Decomposer

A

An organism that breaks down dead plant and animal material so
nutrients can be recycled back to the soil or water.

27
Q

Competition

A

When two or more living things struggle against each other to get the
same resource.

28
Q

Evolution

A

Theory that the animal and plant species living today descended from
species that existed in the past.

29
Q

Biodiversity

A

The variety of living things. It is measured as the differences between
individuals of the same species, or the number of different species in an
ecosystem.

30
Q

Natural selection

A

Process by which species change over time in response to

environmental changes and competition for resources.

31
Q

When no more individuals of a species remain

A

Extinct

32
Q

What all substances are made up of, and which contain only one type of
atom.

A

Elements

33
Q

A substance, normally a liquid, that dissolves another substance

A

Solvent

34
Q

A substance that can dissolve in a liquid.

A

Solute

35
Q

Mixture formed when a solvent dissolves a solute.

A

Solution

36
Q

Capable of dissolving in a liquid

A

Soluble

37
Q

Maximum mass of solute that dissolves in a certain volume of solvent.

A

Solubility

38
Q

Single type of material with nothing mixed in.

A

Pure substance

39
Q

Two or more pure substances mixed together, whose properties are
different to the individual substances

A

Mixture

40
Q

Separating substances using a filter to produce a filtrate (solution) and
residue.

A

Filtration

41
Q

Distillation

A

Separating substances by boiling and condensing liquids.

42
Q

Evaporation

A

A way to separate a solid dissolved in a liquid by the liquid turning into a
gas

43
Q

Chromatography

A

Used to separate different coloured substances

44
Q

Weight

A

The force of gravity on an object. Measured in Newtons (N).

45
Q

Non-contact force

A

One that acts without direct contact.

46
Q

Mass

A

The amount of stuff in an object (kg)

47
Q

Gravitational field strength

A

The force from gravity on 1 kg (N/kg).

48
Q

Gravitational Field

A

The area where other objects feel a gravitational force.

49
Q

The Universe

A

The totality of existence, including planets, stars, galaxies, the contents
of intergalactic space, and all matter and energy.

50
Q

The solar system

A

Contains the Sun and its planets.

Revision 2021 ( all unit test ) (17 decks)

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