Floating point numbers are numbers that have a fractional part, usually represented using two components. Examples of continuous variables are length, temperature, time, weight, voltage, and many more. Exam questions for aqa gcse computer science 2016 laurence james. Students should be able to describe the structured approach including modularised programming, clear, well documented interfaces local variables, parameters and return values. Variables are data values that can change when the user is asked a question, for example, their age. The site will be invaluable to students studying the ocr, aqa, edexcel or eduqas computer science gcse courses. Programming theory and quizzes for computer science gcse. First video in the programming theory subtopic covering data types, the 3 constructs including definite and indefinite loops and variables and. Data are numbers, pictures, symbols, or anything else that by itself has no. Variables could be used to store the score in a game, the number of cars in a car park or the cost of items on a till. Designed by computer science uk icons made by vectors market from. In this gcse biology quiz we look at independent or key variables the ones which are subject to change. The measurements which we make provide us with the data which can be used as evidence.
Basically, a variable is any factor that can be controlled, changed, or measured in an experiment. Please use the links to access revision for various parts of the edexcel gcse in computer science. Students should use meaningful variable identifiers for example, age for a. Use the printable worksheet to identify study points to look for. Variables and data types gcse computer science resources. If you have not identified the control in a science experiment, you may be mistaking one of your controls as an independent variable. Check your understanding of scientific variables in this worksheet and quiz. In order to get better results in a science experiment, a control is key. We use cookies to ensure that we give you the best experience on our website. Computer scientists design, develop, and apply the software and.
The three variables can sometimes be easily mistaken. Programs and data constants, variables and data types. Programming gcse 91 computer science lesson resources. Ocr gcse computer science paper 2 flashcards quizlet. Aqa gcse computer science aqa gcse computer science. Computer programs use variables to store information. Glossary dependent and independent variables often in science we are looking at cause and effect.
Dadsusers can only access info if a network connection is prsent, few storage is possible. See current entries and add your own how and why to enter grow your grades. Revise gcse science from the aqa core and additional, edexcel, ocr 21st century core and additional and ocr gateway syllabuses. Make sure you understand them by playing this fun aqa unit 4 quiz and revising what you learned in year 10 and year 11. Gcse computing aqaconstants, variables and data types. Constants, variables and data types computer programs use data types to organise different types of data in a program. How to create, rename, recode and merge variables in r. This resource is not based on any particular programming language, so is applicable for any part. A variable is a value used in programming which normally changes as the program is executed. In programming, a variable is a value that can change, depending on conditions or on information passed to the program. Constants, variables and data types gcse computer science. Variables theory for gcse computer science tes resources. Variables practical for gcse computer science using python.
In programming, data types are the attributes that specify the type of data that an object can hold. Gcse variables revise controlled factors in experiments. Gcse computer scienceconstants, variables and data types. Tutorials, tips and advice on gcse isa scientific terms. The dependent variable is the variable of which the value is measured for each and every change in the independent variable. In particular, you will be asked to draw a graph when you change one variable and measure what happens to the other variable. Make sure that you have sql downloaded and installed on your computer. They study assignment and make sure that the variables are printed to the screen, using a variety of paradigms. Integers are whole numbers represented as binary values. The independent and dependent variables are the ones usually plotted on a chart or graph, but there are other types of variables you may encounter. A change in a variable might not be detected at all if the instrument does not have enough sensitivity.
Teach computer science provides detailed and comprehensive teaching resources for the new 91 gcse specification over 5,000 teachers have signed up to use our materials in their classroom. To be clear though, for a science fair, it is usually wise to have only one independent variable at a time. These are physical, chemical or biological quantities or characteristics. Although the algorithm above only contains 1 variable, trace tables can keep track of. Controls are yet another variable in a science experiment that is used to compare other variables to. Gcse variables revise key or independent experiment factor.
An editable powerpoint lesson presentationeditable revision handoutsa glossary which covers the key terminologies of the moduletopic mindmaps for visualising the key conceptsprintable flashcards to help students engage active recalla quiz with answer key to test knowledge and understanding of the modulecompatible with the. Software is the programs and other operating information used by a computer. They study assignments and make sure that the variables are printed to the screen, using a variety of paradigms. To do well in gcse biology you need to know how to conduct a fair experiment. The programmer gives each variable a name to identify it. In programming, a variable is a named data location in a program for a value that can be changed during the running of the program. Gain the knowledge ethernet, wifi and protocols check your understanding ethernet, wifi and protocols wired, wireless and protocols gcse. Teach any a level computer science class we have put together a full a level computer science curriculum that will give you all the teaching materials you need to teach any topic. Computer hardware teach gcse students about modern computer hardware and the different input and output devices. Basic programming constructs variables and data types string manipulation functions and procedures file handling data structures producing robust programs whats included. Computer science keyword of the day home contact upload log in.
Start studying edexcel gcse computer science key questions. Variables, constants and data types fazakerley high school. Sep 17, 2014 computer language is built on constants and variables, and is made up of three groups. Variables gcse computer science ocr 91 programming with.
Teachers should be aware that the terms arguments and parameters are sometimes used but in examinable material we will use the term parameter to refer to both of. A variable which belongs to a particular category is called a categoric variable. How sensitive an instrument is tells you how small a change it can detect. Scientific experiments have several types of variables. If you need help with this, follow the help guide here.
Two numerical variables, x and y, having at least a moderate correlation, been established through both correlation and scatterplot, are in some type of linear relationship. In computer programming, a variable or scalar is a storage address identified by a memory address paired with an associated symbolic name, which contains some known or unknown quantity of information referred to as a value. A program can contain many variables and constants, so it is important to give them sensible names that try to describe the item of data that they hold. Share flipboard email print in a science experiment, the independent variable is the one you intentionally change or control. Top quality computer science resources for ks3, ks4, ks5 gcse computer science using variables constants the education site for computer science and ict. Computer hardware gcse computer science lesson resources. This quiz, based on aqas unit 4, looks at the third of these factors and will help you revise independent key variables.
Whilst every effort has been made to include full and accurate material, i take no responsibilities for any errors or. If the answer you have written is not right, change it to the. You will be asked to draw a graph in igcse chemistry, physics, biology or science exams. Variables are the things that we change, or decide not to change, in an experiment. Control variables are ones which remain the same throughout and dependent variables are the ones being measured. For gcse science coursework and exams for students, parents and teachers. Learn more about what is a control in a science experiment and how to create one. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Check your understanding utility software utility software gcse. An ide integrated development environment provides programmers with various tools that are helpful when programming. You can think of the independent variable as being the cause and the dependent variable. Tick the box to indicate if the identifier should be a constant or a variable. The data consists of constants or fixed values that never change and variable values which are usually initialized to 0 or some default value. Researchers often use that relationship to predict the value of y for a given value of x using a straight line. Data can also be constant or variable within programs and functions. There are three types of variables in scientific experiments, but we will define them later in the lesson. Ides have a number of different tools and functions that assist. Variables are always added horizontally in a data frame. Computer language is built on constants and variables, and is made up of three groups. As we already know, variables are used by programs to store data. One way to explain it to a child is that it is the variable that the child can change during the experiment. For example, the distancetime graphs of a stationary object.
Categoric variables give you less information than continuous variables. Your x axis should always show the independent variable this is the variable you are changing. To find video tutorials covering maths skills in biology, go to the my gcse science search and enter the term maths skills. In this example, age is a constant because we will not change it variables. Variables and constants during the running of a computer program, there will be times when the program needs to rememberstore a value so it can be read and used later on. Our cambridge igcse computer science homeschooling course will guide your child through the principles of computer science that will give them the underpinning knowledge required for other science and engineering subjects. Constants and variables constants, variables and data. Whether youre a brand new computer science teacher, or youve been teaching ict for years, our resources will save you hours and hours of lesson preparation. In science, a variable is any item, factor, or condition that can be controlled or changed. Variables and constants computer science gcse guru.
Ocr gcse paper 1 quiz 1 computational thinking lite writing algorithms lite. The benefits of studying cambridge igcse computer science. An editable powerpoint lesson presentation editable revision. Revisecomputerscience is your complete gcse computer science revision package for your computer science gcse. As part of their work on experiments, year 10 and year 11 students will look at variables in gcse biology. The first variable type is called the independent variable.
Dan hangs different masses on the end of a spring to see how mass effects the spring length. Tes global ltd is registered in england company no 02017289 with its registered office. Think of a variable as a box with a name, where we can store something. In other words, the dependent variable is the thing that changes as a result of you changing something else. It accompanies cambridge university presss gcse computer science for ocr student textual. Gain the knowledge issues and legislation check your understanding issues and legislation ethical, legal, cultural and environmental concerns gcse. Learn about data types, constants and variables within computer programmes for gcse bitesize computer science. A variable is a location in memory that holds one or more values. In science, when a variable is studied, its attribute is recorded.
The relationship can be linear, directly proportional, inversely proportional or nonlinear. Ads backing up data, more reliable than storing info on a hard drive as memory is easily lost, user doesnt need to buy latest software. In order to store a value, the program needs to establish a memorable named place data structure that it can use to hold the data. There are five types of variables that you should know about and it will take some time for you to become familiar with them. The variable name is the usual way to reference the stored value, in addition to referring to the variable itself, depending on the context. Gcse specifications in computer science should enable students to. In other words, they are the very things we are investigating. Cambridge igcse computer science course wolsey hall. Programming data types in programming, data types are the attributes that specify the type of data that an object can hold. Programs and data constants, variables and data types gcse.
Variables are an important part of science projects and experiments. Variables and constants are two commonly used mathematical concepts. Programming this module covers the computer programming topics that students need to learn at gcse level. A paper 1 exam 1 hour 40 min weighting 40% a paper 2 exam 2 hours weighting 40% a controlled assessment 20 hours weighting 20%. When programmers develop computer software whether thats desktop or webbaseddata types must be assigned and applied correctly in order to guarantee. Aqa gcse computer science exam questions cardinal hume. If height is the variable, its attribute might be 5 m, 2. Constants and variables constants, variables and data types. The relationship between variables the way that the variables change is called the relationship between the variables. If you continue to use this site we will assume that you are happy with it.
Gcse computer science flashcards in gcse computing. During the running of a computer program, there will be times when the program needs to rememberstore a value so it can be read and used later on. A constant is a value used in programming which will not change throughout the program. Edexcel gcse computer science key questions quizlet. Constants and variables variables are used in computer programming to store specific values within a program. Use the date type for a variable to store your date. A complete bundle for ocr 91 teaching variables with python. Variables in the main program can be made global with the keyword global. Scientific modelling is a scientific activity, the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate by referencing it to existing and usually commonly accepted knowledge. Computer science gcse core aims of the subject at key stage 4 the computer science department at brine leas aim to equip students with the skills to participate in a rapidlychanging world through challenging and engaging topics, giving students a. We need to sort out this concept before we rush into drawing graphs. A variable in any programming language is a named piece of computer memory, containing some information inside. The best way to remember the information in this chapter is to get a pen and paper and write down your answers before clicking on the answer link which will take you to the correct page you may have to read through some of the page before you find the answer.
Controlled variables are any other outside variables that may affect the dependent variable. For example, if eye color is the variable, its attribute might be green, brown, or blue. We create, edit and delete variables, as much as we need in our tasks. For the 101 on command words in gcse biology, look at this very helpful guide.
Ide programming software and the ide gcse computer. Here is a list of the sql commands that you will need to know for the edexcel computer science gcse. To be able to keep track of changing data this is the purpose of a variable. This website and its content is subject to our terms and conditions. Describing, explaining and comparing graphs my gcse science. Now, lets talk about those three types of variables used in scientific experiments. An independent variable is a variable that you can control. A variable is a characteristic, while an attribute is its state.
If you are new to doing science projects and want to know the effect of changing multiple variables, do multiple tests where you focus on one independent variable at a time. Variables are the things that we change, or decide not. To create a new variable or to transform an old variable into a new one, usually, is a simple task in r. Linear just means that the two variables give a straight line graph. It has a label or name to identify it and its values can be changed as the program runs. Log in to into science activities science a journey of discovery the basketball experiment. Gcse computer science programming concepts variables and. Gcse computer science 91 ocr j276 variables constants. A data type is a means of classifying the type of data that a variable or object can hold in computer programming. Gcse science high school variables continuous discrete. The common function to use is newvariable oldvariable.
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