Question 1: Explain what a variable is in programming and give an example of a variable name you might use for storing a student's score.

Answer: A variable is a named storage location in a program that can hold a value which may change. Example: 'score' or 'studentScore'.

Question 2: Write a line of code in a programming language of your choice to create a variable called 'total' and assign it the value 50.

Answer: For example, in Python: total = 50

Question 3: Describe what happens when the following code runs: 'x = 10; x = x + 5'. What is the final value of x?

Answer: Initially, x is assigned the value 10. Then, x is increased by 5, so the final value of x is 15.

Question 4: Identify the mistake in this code snippet: 'name = John'. How should it be corrected?

Answer: The string 'John' should be enclosed in quotes. Correct code: name = 'John'.

Question 5: In a programming language you know, write a line that creates a variable called 'age' and sets it to 12.

Answer: For example, in JavaScript: let age = 12;

Question 6: Complete the following statement by filling in the missing word: 'Variables are used to store ____ in a program.'

Answer: data

Question 7: Draw a diagram showing how a variable stores data in a computer's memory. Label the variable name and the stored value clearly.

Answer: A sketch with a box labeled 'variable name' pointing to another box labeled 'value'. For example, 'score' pointing to '100'.

Question 8: Describe what the following code does: 'height = 150; height = height + 20'. What is the new value of 'height'?

Answer: The variable 'height' is initially 150. Then, 20 is added to its current value, making the new value 170.

Question 9: Write a short program snippet that creates a variable called 'name' and assigns your own name to it.

Answer: In Python: name = 'YourName' (replace 'YourName' with your actual name).

Question 10: In your own words, explain why variables are important when writing a program.

Answer: Variables are important because they allow programmers to store, change, and use data easily throughout the program, making it more flexible and efficient.

Question 11: Draw a flowchart showing the steps to assign a value to a variable and then use that variable in a calculation.

Answer: A flowchart with two steps: first, 'Assign value to variable'; second, 'Use variable in calculation'. The drawing should include symbols for process steps, with arrows connecting them.