Brainscape's Knowledge GenomeTM

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


See full index

Science-Emer > Definitions > Flashcards

Definitions Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Acceleration

A

The change in speed divided by the time taken for the change

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

Acid

A

A substance which turns blue litmus paper red and has a pH of less than 7. Acids have a sour taste and a sharp feel.

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

Acid rain

A

Rainwater which has a pH less than 5.5

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

Activity series

A

A list of metals placed in order of their reactivity

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

Adaption

A

A structure or habit that helps an organism survive in its habitat.

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

Aerobic respiration

A

Oxygen is needed to release energy from food

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

Alkali

A

A substance which reacts with an acid to form a salt and water.

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

Alkali metals

A

Group 1 on the periodic table eg. Sodium

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

Alkaline earth metals

A

Group 2 of the periodic table. Eg. Calcium

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

Alloy

A

A mixture of metals

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

Alternating current

A

A current that constantly changes direction

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

Altimeter

A

An instrument that measures change in pressure and translated into height above sea level.

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

Amp

A

The unit of current

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

Anaerobic respiration

A

Oxygen is not used to release energy from food

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

Area

A

The amount of surface that covers an object

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

Asexual reproduction

A

New individuals are formed from only one parent

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

Atom

A

The smallest part of an that still has the properties of that element

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

Atomic number

A

The number of protons in an atom of that element

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

Base

A

A substance that neutralises an acid to form salt and water. Bases turn red litmus paper blue.

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

Beating tray

A

A device used to collect animals

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

Biotechnology

A

The use of living to produce useful products

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

Bond

A

Force of attraction that holds atoms together

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

Canines

A

Teeth that are long and pointed and used to grip and tear food.

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

Carnivore

A

An animal that eats other animals only

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

Catalyst

A

Substances that alter the rate of a chemical reaction but are not used up themselves

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

Cellulose

A

The substance which make cell walls and provides fiber in the human diet

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

Cell wall

A

Found outside the plants membrane

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

Centre of gravity of a body

A

A point about which the turning effects due to gravity are balanced

29
Q

Chemical change

A

A reaction in which a new substance is formed

30
Q

Chemical energy

A

Energy stored inside materials in the chemical bonds holding them together

31
Q

Chlorination

A

The addition of chlorine to water to kill bacteria

32
Q

Chloroplasts

A

Contain the green pigment called chlorophyll

33
Q

Competition

A

Takes place hen two or more organisms require something that is in short supply

34
Q

Compunds

A

Made up of 2 or more different types of atom chemical combined

35
Q

Concentrated solution

A

A solution that contains a large amount of solute in a small amount of solvent

36
Q

Conductor (electrical)

A

An object that allows a charge to move

37
Q

Conductor (heat)

A

An object that allows heat to travel through it

38
Q

Conservation

A

The protection and wise management of natural resources

39
Q

Contraception

A

The prevention of fertilization or pregnancy

41
Q

Corrosion

A

An undesirable process whereby a metal changes to its oxide or some other compound by combining oxygen with air

42
Q

Covalent bond

A

A bond that consists of a pair of electrons shared between two non metals.

43
Q

Crystallization

A

The formation of crystals by cooling a saturated solution or by evaporation solvent off

44
Q

Decibel

A

A unit of sound

45
Q

Decomposers

A

Organisms that feed on dead plants and animals

46
Q

Density

A

The mass of each cubic meter of an object

47
Q

Diffusion

A

The name used to describe the way particles in gases and liquids spread throughout the space in which they are placed

48
Q

Digestion

A

The breakdown of food

49
Q

Dilute solution

A

A solution containing a small amount of solute and a large amount of solvent

50
Q

Convection

A

The transfer of heat through liquids and gases by the mass movement of particles

51
Q

Direct current

A

The flow of charge in one direction only around a circuit

52
Q

Dispersal

A

The carrying of the seed (and the surrounding fruit) as far away as possible from the parent plant

53
Q

Dispersion

A

The breaking up of white light into its 7 colours

54
Q

Distillation

A

A process used to separate two miscible liquids with different boiling points eg. Alcohol and water

55
Q

Diode

A

A device that allows current to flow in one direction only

56
Q

Echo

A

The reflection of sound

57
Q

Ecology

A

The study of the relationship between plants animals and their environment

58
Q

Electrical energy

A

Energy caused by moving charges

59
Q

Electric current

A

The movement of charge through a material

60
Q

Electrolysis

A

A chemical reaction produced by using electricity

61
Q

Electromotive force

A

Force from a battery to cause current

62
Q

Electron

A

A negatively charged particle in an atom

63
Q

Electronic configuration

A

The arranged of electrons in an atom

64
Q

Elements

A

Substances made up of only one type of atom

65
Q

Energy

A

The ability to do work measured in joules (j)

66
Q

Enzyme

A

A chemical (protein) that speeds up chemical reactions without having being used up

67
Q

Equilibrium

A

A still object i.e. Not spinning or moving. Either stable, unstable or neutral

68
Q

Evaporation

A

The changing of a liquid to a gas

69
Q

Excretion

A

The removal of the waste products from the body of chemical reactions in the body

Science-Emer (16 decks)

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