not covered in water animals that live on landearth or soil is the soft substance that covers the ground and that plants grow in Green shoots peeped through the earth. fertile soilThe Earth or earth is also the planet that we live on.The floor is the surface that you walk on when you are indoors There's mud all over the floor!geology [uncountable]the study of the rocks, soil etc that make up the Earth, and of the way they have changed since the Earth was formedgeologist noun [countable]geological adjectivegeologically adverbmeteorology [uncountable]the scientific study of weather conditionsmeteorologist noun [countable]The storms have baffled meteorologists in the United States.meteorological adjective:satellites that provide meteorological data to the National Weather Serviceoceanography [uncountable]the scientific study of the oceanoceanographer noun [countable]maths [uncountable]British English informal mathematics [= math American English]the new maths teachermaths lessonsShe got top marks in maths and chemistry.number1number [countable] a word or sign that represents an amount or a quantity[ numeral, figure]:They wrote various numbers on a large sheet of paper.Five was her lucky number.an even number (=2, 4, 6, 8, 10 etc)an odd number (=1, 3, 5, 7, 9 etc)round number (=a number ending in 0)A million pounds seemed a suitably round number.be good/bad/no good with numbers informal (=to be good, bad etc at calculating things using numbers) cardinal number, ordinal number, prime number, whole number2phone [countable] a phone number:My new number is 502-6155.somebody's home/office/work numberI gave him my home number.mobile/fax numberWhat's your mobile number?Sorry, you have the wrong number.3in a set/list [countable] a number used to show the position of something in an ordered set or list:Answer question number 4.a number 17 bus E number among their own number.18grammar [uncountable] technical the form of a word, depending on whether one thing or more than one thing is being talked about:'Horses' is plural in number, while 'horse' is singular.statistic1 statisticsa) [plural] a set of numbers which represent facts or measurements:the official crime statisticsstatistics forstatistics for injuries at work Statistics show that 50% of new businesses fail in their first year.b) [uncountable] the science of collecting and examining such numbers:Statistics is a branch of mathematics.2 [singular] a single number which represents a fact or measurement:The statistic comes from a study recently conducted by the British government.3 a statistic informal if someone is just a statistic, they are just another example of someone who has died because of a particular type of accident or disease:We can't let these boys become just another statistic.statistical adjective:statistical evidencestatistically adverb:The variation is not statistically significant.physics [uncountable]the science concerned with the study of physical objects and substances, and of natural forces such as light, heat, and movementelectricity [uncountable]1 the power that is carried by wires, cables etc, and is used to provide light or heat, to make machines work etc:The farm was very isolated, but it had electricity.the electricity supplythe electricity bill2 a feeling of excitementoptics [uncountable]the scientific study of light and the way we see