This video looks at how to use BODMAS (also called BIDMAS), which tells you the order in which you should do all the operations, like brackets, order, division, multiplication, addition and subtraction. We also run through 2...

This video covers:

- The different colours of visible l
ight
- How light is used is optic
al fibres
- The concept of fluorescence with ultrav
iolet radiation
- How ultraviolet radiation can

be used in...

This video covers:

- The idea that ultrasound is just sound with a frequency over 20,0
00 Hz
- How we can generate
ultrasound
- How we use ultrasound to view foetuses in pr
enatal scanning
- How we use...

This video covers:

- The difference between scalar and vector quanti
ties
- Why speed is scalar, but velocity is
a vector
- The difference between distance an
d displacement
- How to calculat
e speed and...

This video covers:

- Alcohols are a homologous series of organic compounds with an OH functional g
roup
- How to
name them
- Their properties: flammable, soluble and they c
an be oxidised
- Their uses: as...

This video covers:

- The idea that the carbon-carbon double bond can break, which allows the carbons to bond to new a
toms
- How alkenes react with hydrogen to fo
rm alkanes
- How alkenes react with water to
form...

This video covers:

- How the carbon carbon double bond allows alkenes to form addition poly
mers
- How to write reactions for polym
erisation
- How to draw the monomers, polymers an
d repeat units
- The...

This video covers:

- The structure of
DNA
- What nucleo
tides are
- Complementar
y base pairing
- How gene
s code for proteins
- T

he functions of proteins

Exam board specific info: (p
robably...

This video covers:

- What genetic mutations
are
- What causes mutations e.g. carcinogens and harmful
radiation
- What the cons
equences can be
- The 3 types of mutations: substitution,

addition, deletion...

This video covers:

- The idea that biomass is just the mass of living organ
isms
- Pyramids of biomass show the amount of biomass at each trophic level of a
food chain
- Why the amount of biomass decreases as you...

This video covers:

- Brief summary of sexual and asexual reproduc
tion
- The advantages and disadvantage

s of each

Exam
board specific info:
AQA - Separa
te/triple science only
IGCSE Edexcel -...

This video covers:

- How we can use plant hormones to control growth in pl
ants
- How we can use Auxins to stimulate plants to grow, or k
ill weeds
- Uses of Gibberellin to control dormancy, induce flowering and...

This video covers:

- Why we need to regulate our body temper
ature
- How the thermoregulatory centre in the b
rain works
- How we warm ourselves up when
we're too cold
- How we cool ourselves dow

n when we're too...

This video covers:

- How the eye focusses light onto the retina, which is known as accommod
ation
- How the ciliary muscles and suspensory liga

ments work

Exam
board specific info:
AQA
- Separate science...

This video covers: - The experiment that Mendel did with pea plants, looking at pea colour, flower colour, and height. - How Mendel discovered hereditary units, which could be recessive or dominant - An overview of when chromosomes, and...

This video covers: - What family trees are and how they work - How to use keys - The example of cystic fibrosis - How to use family trees to predict the chance of a disease being inherited Exam board specific info: AQA - Everything is...

This video is part 1 of our series on fractions. It covers what fractions really mean i.e. parts of a whole number, as well as how to simplify them. We also explain the terms numerator and denominator.



This video is...

This video covers:

- The structure of the kidneys and urinary s
ystem
- The structure of t
he nephron
- How filtrate is filtered from the glomerulus to the B
owman's capsule
- Which substances are reabsorbed from...

This video covers:

- The 3 main functions of the kidn
eys:
1) removi
ng waste,
2) regulating level
s of ions, and
3) regula
ting levels of water
- How the kidneys can achieve all of this using filtration...

This video covers:

- What esters
are
- How they're made from carboxylic acids and
alcohols
- Th

eir properties


Exam board specific info:
AQA - Everything is relevant to your course! You only need to...

In this video, you'll learn: - How crude oil is formed - How crude oil is separated using fractional distillation - The process of fractional distillation - Some of the common products of fractional distillation, and their uses

This video covers:

- The idea that atom economy is a measure of the amount of starting materials that end up as useful pro
ducts
- How to calculate at
om economy
- Why we shoul
d care about it
- How to

improve...

This video covers

- The concept of den
sity
- The equation for density and how
to use it
- How to measu
re density for:

- Regular solids
> - Irregul

ar solids /> - Liquids...

This video covers:

- What contact force
s are
- Examples - friction, air resistance, tension, normal reac
tion force
- What non-con
tact forces are
- Examples - gravitational, ele

ctrostatic,...