Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

food > Science Exam > Flashcards

Science Exam Flashcards

You may prefer our related Brainscape-certified flashcards:
Gourmet Food flashcards
1
Q

Definition of energy

A

the ability to work, move or change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is energy transfer

A

moving energy from one place to another, or changing energy form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Potential Energy

A

stored energy waiting to be released (turns into other types of energy, eg. kinetic)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

types of potential energy

A

elastic, gravitational, chemical and nuclear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Elastic potential energy

A

using force to deform an elastic object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Gravitational potential energy

A

Energy an object has in relation to position above earth surface, energy due to height

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

chemical potential energy

A

Energy stored in chemical bonds of a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Nuclear potential energy

A

energy stored in nucleus of an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define kinetic energy

A

Energy caused by motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

types of kinetic energy

A

Light, heat, electrical, sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

light

A

kinetic energy that makes like visible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

heat

A

kinetic energy that produces heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

electrical

A

caused by moving electrons, making an electrical current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

sound

A

kinetic energy causes vibrations and creates sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Energy transformation

A

changing one form of energy into another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

law of conservation of energy

A

energy is neither created nor destroyed but transfered

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Conduction

A

Energy transferred via direct contact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Radiation

A

Transferred through radioactive waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Convection

A

Energy transferred through liquids or gasses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Energy efficiency

A

using less energy to do same task

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

energy efficiency formula

A

Efficiency = (useful energy output / total energy input) x 100

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

properties of light

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

source of light

A

Luminous, non luminous, incandescent and bioluminescent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Luminous

A

Emiting light on its own

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

non luminousd

A

doesnt emit light on its own

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

incandescent

A

emits light as a result of heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

bioliminescent

A

living organism emits light naturally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

law of relection

A

Angle of incidence = angle of reflection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Electromagnetic Spectrum

A

spectrum of radioactive waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

concave

A

bends inwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Convex

A

bends outwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what happens when light meets a substance

A

it transmission, absorption, reflection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

transmission

A

Passes through a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Absorption

A

light gets absorbed into a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Reflection

A

the light bounces off the substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Cornea

A

Protects and helps focus light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

pupil

A

allows light into your eye

38
Q

Retina

A

captures the light and gathers image

39
Q

iris

A

regulates how much light enters the eye

40
Q

optic nerve

A

nerve that sends light image into your brain

41
Q

lens

A

focus light on retina

42
Q

Myopia

A

Short-sightness

43
Q

hyperopia

A

long-sightness

44
Q

how does sounds travel

A

travels in waves through mediums

45
Q

how is sound measured

A

decibels (db)

46
Q

different types of waves

A

Longitudinal, transverse

47
Q

longitudinal

A

straight line

48
Q

Transverse

A

wave like line

49
Q

wave amplitude

A

distance between base line and highest peek of a wave

50
Q

wave frequency

A

number of waves each second ( short vs long wave length )

51
Q

hertz

A

measurement of vibrations in a wave

52
Q

pitch

A

how high or low a sound is

53
Q

wave length

A

distance between 2 wave peeks (crest)

54
Q

Speed of sound

A

343m/sec or ~1200km

55
Q

Properties of a solid

A

Cant be compress, definite volume and shape, particles vibrate in a fixed position

56
Q

properties of a liquid

A

cant be compress, have definite volume not shape, particles move over each other

57
Q

properties of a gas

A

no definite volume or shape, partcles move freely

58
Q

what is diffusion

A

spreading of particles

59
Q

particle model

A

describes how particles move and interracte

60
Q

boiling point

A

point where liquid turn into a gas

61
Q

melting point

A

where a solid turns into a liquid

62
Q

evaporation

A

where surface of a liquid turns into water vapor

63
Q

condensation

A

where water vapor settles into water droplets

64
Q

sublimation

A

when a solid turns directly into a gas

65
Q

impact of heating or cooling substances

A

heating gains energy and cooling loses energy.

66
Q

What is an Atom

A

smallest molecule and make up everything

67
Q

parts of an atom

A

nucleus which has protons and neutrons and electrons

68
Q

Atomic Number

A

number of protons

69
Q

Chemical symbol

A

letter that represents the element

70
Q

what is an element and example

A

an element is a pure substance with only 1 type of atom, an example is gold

71
Q

what is a compound and a example

A

A compound is when 2 or more elements are chemically bonded, an eg is water

72
Q

what is a mixture and a example

A

A mixture is when 2 or more elements can be seperated physically. and eg is coffee

73
Q

properties of a metal

A

Shiny, conductors, bendable, hard, high melting point

74
Q

properties of metalloid

A

brittle, conductors

75
Q

properties of non-metal

A

brittle, poor conductors, low melting point and soft

76
Q

groups vs periods

A

groups are vertical and periods are horizontal

77
Q

what is physical change and eg

A

physical change changes in shape, size, texture or colour, eg scrunching paper.

78
Q

what is chemical change and eg

A

chemical change is when a new substance is created and eg is burning wood

79
Q

what is a chemical reaction

A

when reactants react to create a product

80
Q

different sing of a chemical reaction

A

bubbling, precipitation, production of gas

81
Q

reactants

A

elements that take part in the reaction

82
Q

product

A

the new substance created

83
Q

how to write worded equation

A

reactant 1 + reactant 2 arrow product

84
Q

what is reaction rate

A

how fast a chemical reaction takes place

85
Q

how can you speed up reaction

A

surface area, temp, catalyst and concentration

86
Q

catalyst

A

speeds up reaction with out taking part in it

87
Q

corrosion

A

decay of elements

88
Q

rust

A

when iron is exposed to water and oxygen and corrodes

89
Q

how to speed up rust

A

expose to water ocygen and salt

90
Q

how to prevent rust

A

oil, paint and galvanising

food (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions