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Drummond BGE Science > S2 - Forces and Space (complete) > Flashcards

S2 - Forces and Space (complete) Flashcards

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1
Q

Force

A

A push or a pull which can change an object’s speed, direction or shape.

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2
Q

Newton meter / balance

A

Instrument for measuring forces

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3
Q

Newton (N)

A

Unit forces are measured in

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4
Q

Weight

A

Force produced by gravity

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5
Q

Reaction

A

Force from a surface opposing gravity

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6
Q

Traction

A

Force producing movement for an object on a surface (like the ground)

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7
Q

Friction

A

Force between two surfaces opposing motion

e.g. between tyres and the ground

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8
Q

Lift

A

Upwards force for a flying object

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9
Q

Thrust

A

Force from a propeller or jet engine

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10
Q

Drag

A

Force opposing motion for an object moving through a fluid (liquid or gas)

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11
Q

Upthrust

A

Upwards force for a floating object, produced by buoyancy

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12
Q

Fluid

A

Liquid or gas

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13
Q

Streamlined

A

Smooth, curved, pointy shape designed to reduce drag

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14
Q

Name this type of object

Large space object which is not large enough to make its own light

A

Planet

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15
Q

Name this type of object

Large space object which makes its own light (e.g. the Sun)

A

Star

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16
Q

Name this type of object

Large object, but smaller than a planet (e.g. Pluto)

A

Dwarf planet

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17
Q

Name this type of object

Object smaller than a dwarf planet

A

Asteroid

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18
Q

Name this type of object

Object smaller than an asteroid

A

Meteoroid

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19
Q

Name this type of object

Small icy objects which display bright tails when close to a star

A

Comets

20
Q

Astronomical Unit (AU)

A

The distance from Earth to the Sun – 150 million km

21
Q

Light year

A

The distance light travels in a year – 9.5 million billion km

22
Q

A large gravitationally bound system of stars, numbering from 100 million to 100 trillion

A

Galaxy

23
Q

Exoplanet

A

A planet outside our own Solar System

24
Q

A force can change an object’s ________, _________ or__________.

A

speed, direction or shape

25
Q

Name this piece of equipment

A

Newton meter

(or Newton balance)

26
Q

Forces are measured in units called ___________.

A

newtons (N)

27
Q

Name this force

A

Weight

28
Q

Name this force

A

Traction

29
Q

Name this force

A

Friction

30
Q

Name this force

A

Lift

31
Q

Name this force

A

Thrust

32
Q

Name this force

A

Drag

33
Q

Name this force

A

Upthrust

34
Q

Name this type of shape

Smooth, curved, pointy shape designed to reduce drag

A

Streamlined

35
Q

A planet outside our own Solar System

A

Exoplanet

36
Q

Habitable zone

A

A zone in which the temperature on a planet allows liquid water to exist.

37
Q

When is friction useful?

A

Grip for shoes/tyres, brakes, slows down parachutes, etc

38
Q

When is friction problematic?

A

Slows down machinery/cars, can cause overheating

39
Q

Ways to reduce friction

A

Rollers, ball bearings, lubrication (e.g. oil)

40
Q

The Earth rotates on its axis every ________________. This is the length of one day and night cycle.

A

24 hours

41
Q

The Earth ____________________ every 24 hours. This is the length of one day and night cycle.

A

rotates on its axis

42
Q

The length of one year is ___________ days. This is how long it takes the Earth to orbit around the Sun.

A

The length of one year is 365.25 days. This is how long it takes the Earth to orbit around the Sun.

43
Q

The length of one year is 365.25 days. This is how long it takes __________________________________.

A

The length of one year is 365.25 days. This is how long it takes the Earth to orbit around the Sun.

44
Q

Why do we have seasons?

A

The Earth is tilted on its axis. When one hemisphere (side) of the Earth is tilted towards the Sun, it is summer in that hemisphere. When it is tilted away from the Sun, it is winter.

45
Q

List all planets in the Solar System starting with the one closest to the Sun.

A

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

46
Q

Unit forces are measured in

A

Newton (N)

Drummond BGE Science (12 decks)

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