Science Flashcards
monday revision (108 cards)
1
Q
The smallest units of matter that have the properties of an element.
A
Atom
2
Q
Substances made of one type of atom.
A
Element
3
Q
Substances made of two or more different elements chemically bonded
together.
A
Compound
4
Q
An arrangement of elements in the order of their atomic numbers.
A
Periodic Table
5
Q
The columns running down the periodic table.
A
Groups
6
Q
The rows running across the periodic table
A
Periods
7
Q
The mass of an atom, determined by the sum of the protons and neutrons in
the nucleus.
A
Atomic Mass
8
Q
A description of how a chemical acts or behaves
A
Property
9
Q
A material which allows electricity or heat to pass through it.
A
Conductor
10
Q
A quantity which has size only e.g. distance
A
Scalar
11
Q
A push, a pull or a twist.
A
A Force
12
Q
The unit for force.
A
Newton
13
Q
The equipment used to measure the size of the force.
A
Newtonmeter
14
Q
A force acting between objects that are physically touching
A
Contact force
15
Q
A force acting between objects that are physically separated.
A
Non-contact force
16
Q
The force acting on an object because of the pull of gravity. (W = mg)
A
Weight
17
Q
The centre of mass is the point at which the mass of a body is thought to be
concentrated.
A
Centre of Gravity
18
Q
A force created by large objects pulling other objects towards them .
A
Gravity between planets
19
Q
An upward force experienced by an object in water.
A
Upthrust
20
Q
The measure of how much energy is transferred when a force moves an
object.
A
Work done
21
Q
A single force which can replace all the forces acting on an object and have
the same effect.
A
Resultant force
22
Q
An object that has a resultant force of 0 because the forces are equal and in
opposite directions
A
Balanced force
23
Q
An object that has a resultant force of more than 0.
A
Unbalanced force
24
Q
A vector, it is speed in a particular direction
A
Velocity
25
Produces eggs and is where the foetus develops after fertilisation.
Female reproductive
| system
26
Produces sperm to fertilise the eggs
Male reproductive system
27
The fusing of the nucleus of the male gamete with the nucleus of the female
gamete producing a zygote
Fertilisation
28
The rows running across the periodic table.
Periods
29
The mass of an atom, determined by the sum of the protons and neutrons in
the nucleus.
Atomic Mass
30
A description of how a chemical acts or behaves.
Property
31
The material can be hammered or pressed into shape without breaking or
cracking.
Malleable
32
The female gamete which is also known as an egg.
Ova
33
The glands where sperm (male gamete )and the hormone testosterone are
produced.
Testes
34
A muscular tube that leads from the cervix to the outside of the body;where
the penis is placed during intercourse.
Vagina
35
Connects the ovary to the uterus and is usually the site of fertilisation.
Oviduct
36
A muscular bag where a foetus develops during pregnancy
Uterus
37
The material can be stretched out into a wire
Ductile
38
A quantity which has both size and direction e.g. velocity
Vector
39
The release of a mature egg during the menstrual cycle
Ovulation
40
If the egg is not fertilised, the uterus is released; the period.
Menstruation
41
The developing baby is called this for the first 9 to 10 weeks.
Embryo
42
The process of change in a child’s body when it matures into an adult
Puberty
43
When the developing embryo becomes embedded in the uterus lining.
Implantation
44
Anchors the foetus in the uterus and provides nutrients and oxygen as well as
supporting the removal of waste
Placenta
45
Surrounds and protects the foetus in the uterus
Amniotic fluid
46
Flexible tube connecting the foetus to the placenta
Umbilical cord
47
The dense centre of the atom which consists of protons and neutrons
Atomic Nucleus
48
Negatively charged subatomic particles which orbit the nucleus of the atom.
Electrons
49
A positively charged subatomic particle found in the nucleus of the atom
Proton
50
A subatomic particle with no charge found in the nucleus of the atom.
Neutron
51
The number of protons in the nucleus of an atom. (number of protons =
number of electrons).
Atomic number
52
The sum of the protons and neutrons in the nucleus of an atom
Atomic Mass
53
The arrangement of electrons in shells of an atom
Electronic Structure
54
An object that has a resultant force of more than 0
Unbalanced force
55
An idea that explains how or why something happens.
Hypothesis
56
A statement suggesting what you think will happen in an
| experiment/investigation
Prediction
57
The variable that must be kept constant so that it doesn't affect the outcome of
the investigation. (variable = something that can change in an experiment)
Control variable
58
The variable that is changed in an experiment; it is what we are investigating.
(variable = something that can change in an experiment)
Independent variable
59
The variable that is measured and recorded for each change of the independent
variable. (variable = something that can change in an experiment)
Dependent variable
60
The identification and evaluation of potential harm caused by something.
Risk assessment
61
Something that could cause harm.
Hazard
62
A measure taken in advance to prevent something dangerous from happening.
Precaution
63
A substance that can dissolve/ burn your skin or other materials
Corrosive
64
A material that ignites easily.
Flammable
65
A small adjustable gas burner used in laboratories as a source of heat.
Bunsen burner
66
A tube with a flat base that has a graduated scale on the side so that you can
measure a volume of liquid.
Measuring cylinder
67
A flask with a narrow neck which allows reactants to be swirled safely
Conical flask
68
A glass container with a flat bottom to hold liquids
Beaker
69
A result that does not fit the expected pattern.
Anomalous result
70
A graph that represents categorical data in rectangular columns
Bar graph
71
A graph with points connected by lines to show how something changes in
value
Line graph
72
What does S.A.L.T. stand
| for?
Scale, Axis, Label and Title. We can use this to remember the sequence of
graph plotting.
73
This is worn to protect us in the lab e.g. safety goggles
Safety equipment
74
The sum of all values divided by the total number of values (also referred to as
an average).
Mean
75
This is the simplest unit of a living organism.
A cell
76
This is a partially permeable barrier and controls what goes in and out of the
cell
Cell membrane
77
This is a jelly-like substance in cells where chemical reactions occur.
Cytoplasm
78
This contains DNA and controls the cell.
Nucleus
79
A sub-cellular structure where respiration takes place to make energy.
Mitochondrion
80
A sub-cellular structure responsible for protein synthesis
Ribosome
81
Organelles found in both
| animal and plant cells.
Cell membrane, cytoplasm and nucleus.
82
Magnification formula
Magnification = size of image / actual size
83
Cells which have genetic material contained in a nucleus and membrane bound
organelles.
Eukaryotic
84
Cells which do not have a nucleus nor membrane bound organelles.
Prokaryotic
85
An object, or group of objects that interact.
A system
86
A measure of the energy stored in a substance due the vibration and motion of
particles (changes can cause heat to be lost or gained).
A thermal energy store
87
A measure of the energy stored in a moving object
A kinetic energy store
88
A measure of the energy stored based on its height above the Earth
A gravitational energy store
89
The unit used to measure energy
Joules (J)
90
A measure of the energy stored when a material is stretched or compressed.
Elastic energy store
91
A measure of the energy stored in the bonds of chemical compounds. This
energy is released when a chemical reaction takes place .
Chemical energy store
92
Energy cannot be created or destroyed. It can only be transferred from one type
to another
The law of conservation of
| energy
93
A finite resource that cannot be replaced and will run out e.g.: fossil fuels
Non- renewable
94
A resource that can be replaced as it is used and will not run out e.g. tidal
power
Renewable
95
The three fossil fuels
Formed millions of years ago: coal, oil and natural gas
96
Seven renewable energy
| resources
Geothermal power, solar power, hydroelectric power, biomass, wind power, tidal
power and wave power can all be used to create electricity.
97
Something with stored energy that can be released in a useful way.
Energy resource
98
A substance that can be burned to release energy
Fuels
99
Used to describe ways in which energy is wasted. The energy has spread out
or heats up the environment.
Dissipated
100
The three states of matter
Solid (s), liquid (l) and gas (g) are the way particles are arranged.
101
The process of turning a solid to a liquid when it is heated (particles gain
energy).
Melting
102
The process of turning a liquid to a gas when it is heated to its boiling point
(particles gain energy
Boiling
103
The process of turning a liquid to a gas despite being below its boiling point
Evaporation
104
The process of a gas turning into a liquid when it is cooled (particles lose
energy)
Condensing
105
Magnification = size of image / actual size
Magnification formula
106
Cell membrane, cytoplasm and nucleus.
Organelles found in both
| animal and plant cells
107
Organelles found in both
| animal and plant cells
Energy cannot be created or destroyed. It can only be transferred from one type
to another
108
Solid (s), liquid (l) and gas (g) are the way particles are arranged.
The three states of matter
