Realgrades

This type of surface is a good absorber and emitter of thermal radiation - correct answer Dark, rough (matt) surface This type of surface is a bad absorber and emitter of thermal radiation - correct answer Light, shiny surface In this process particles vibrate colliding with each other passing energy along. Solids are best at it, then liquids, then gases. - correct answer ...

Opportunity Cost - correct answer The cost of the (next) best alternative, which is foregone when a choice is made. Economics - correct answer The study about how resources can be allocated in a world of scarce resources and infinite wants. Demands - correct answer Is the wants and needs of a certain resource. Finite - correct answer ...

Needs - correct answer Something essential to survival - food, water, warmth, clothing and shelter Wants - correct answer Something you would like to have, but is not essential to survival Resources - correct answer Something used to produce output Productivity - correct answer Output per worker per pe...

Alkane - correct answer Hydrocarbon with no double bonds Alkene - correct answer Hydrocarbon with one or more double bonds Fractional distillation - correct answer Method of separating liquids by boiling point Kerosene - correct answer One of the fractions of crude oil, used for aircraft fuel Alcoho...

What is homeostasis? - correct answer The maintenance of a constant internal environment. What is a stimulus? - correct answer A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - correct answer Detect the stimulus or change in environment. What happens ...

What are the two main types of cell - correct answer Prokaryotic Eukaryotic Which cells are prokaryotic - correct answer Bacteria What cells are eukaryotic - correct answer Plant animal and fungal What are the differences between the two types of cells - correct answer Prokaryotic cells are smaller i...

What is a CPU? - correct answer The CPU is the 'brain' of the computer. It is the device that carries out software instructions. They get hot so have fan attached to them What is the main memory of a computer? - correct answer Any data or instructions that are to be processed by the CPU must be placed into main memory (sometimes known as primary storage). What is RAM? - correct answer ...

area of a circle - correct answer surface area of a sphere - correct answer surface area of a cone - correct answer πr x slanted length x πr^2 volume of cone - correct answer volume of a sphere - correct answer area of trapezium - correct answe...

Alliteration - correct answer The repetition of the same consonant sound, especially at the beginning of words. Assonance - correct answer repetition of vowel sounds Atmosphere - correct answer The mood created by a piece of writing Genre - correct answer A particular type of writing - e.g. prose, poet...

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