CCEA

waves: they are produced as a result of vibrations and do not transfer energy longitudinal waves: the particles vibrate parallel to the direction the wave is travelling e.g sound Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:04 / 0:15 Full screen Brainpower Read More transverse waves: particles vibrate 90 degrees to the direction of wave travel e.g water and electromagnetic longitudinal frequency: the number of vibrations made by a p...

Crude birth rate This is the total number of live births per 1000 of the population per year. Crude death rate This is the total number of deaths per 1000 of the population per year. Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:04 / 0:15 Full screen Brainpower Read More Natural change This is the difference between the number of deaths and the number of births in a place. Natural increase When the birth rate is high than the death r...

Canon - Background - Johann Pachelbel - Written in/around 1680 - Published in 1920's Allegretto - Background - Work in symphony began in 1811 and finished in 1812 - First performance in Vienna in 1813 - Four movements - Allegretto - "a little lively" - Symphony no.7 - 2nd movement Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Mars - Background - Written by Gustav Holst - English composer ...

Business Enterprise Any operation established to produce or supply goods/services desired by consumers generally with a view to making profit. Factors of Production The inputs of land, labour, capital and enterprise required to produce or supply goods/services. Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Entrepreneur Someone who starts and runs a business and has the responsibility of the risks in...

Food provenance The origin of food, or where food comes from. In terms of food provenance, Food can be grown, reared, or caught. Consumers prioritise poultry, red meat, eggs, fish, shellfish, dairy products, fruit, and vegetables. Food Traceability Having access to information about where food comes from and assurances that food is safe to consume Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Sustain...

Activation energy The activation energy required for a reaction is reduced by enzymes. Active site The area of the enzyme where the substrate fits. Can be denatured by pH and heat. Complementary to the substrate. Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Active transport Movement of molecules against the concentration gradient (low to high) and requires energy. Adenine One of the 4 bases...

Macro economics The study of the performance and behaviour of an economy as a whole. mixed economy An economic system that allows both the government and the private sector to allocate resources, e.g. the UK has a mixed economy. Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Business Cycle A measure of the regular fluctuations in the level of economic activity. It is made up of the following elements...

Systems Analyst -Identifies the user requirements -Undertakes fact finding -Defines the system specification Project Manager -To oversee the project -To allocate the budget -Allocates resources- personnel, hardware, software, budget -Identifies risks -Reports back to the client Programmer -Writes the code from the module specification -Tests the code using a test plan -Debugs the code -Documents the code Purpose of analysis -Identify the requirements of the sy...

Empirical formula A formula which shows the simplest whole number ratio of atoms of each element in a compound Molecular formula A formula which shows the actual number of atoms of each element in a molecule Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Molar Gas Volume The volume of one mole of gas under specified conditions of temperature and pressure e.g 293K and 1 atmosphere pressure Homo...

Blood Carries oxygen and nutrients to the body's cells, and waste products away from them. Arteries Carry blood away from the heart.Very thick, elastic walls. Small lumen High blood pressure.No valves.The muscle provide strength and allow the arteries to expand as blood is pulsed through, preventing them from bursting. The elastic fibres recoil and muscles contract returning the wall to its original size and smoothing out the blood Previous Play Next Rewind 10 seconds Move...