Quiz on Scratch: If and Else

In Scratch 3, you are building a quiz game where a sprite asks a question and checks if the player's answer is correct. If the answer is correct, the sprite should say "Well done!" and if it is wrong, it should say "Try again!" Which sequence of blocks would best achieve this goal using an if-else structure?

• Use only an "if" block and repeat the question if the answer is wrong

• Use an "if-else" block where the "if" checks if the answer equals the correct answer, then says "Well done!" in the if section and "Try again!" in the else section

• Use two separate "if" blocks, one checking if the answer is correct and another checking if it is wrong, without connecting them

• Use a "forever" loop without any if-else block to keep checking the answer

You are creating a quiz in Scratch 3 where a player scores points. The rule is: if the player answers correctly, add 10 points to the score; otherwise, subtract 5 points. You have a variable called "Score." Which plan best describes how to set up this logic using if-else?

• Set the Score variable to 10 always, regardless of the answer

• Use an if-else block where the condition checks if the answer is correct, changes Score by 10 in the if section, and changes Score by -5 in the else section

• Use an if-else block where both sections add 10 points to the Score

• Use a "wait" block before checking the answer and then add 10 points without any condition

In your Scratch 3 quiz, you want the background to change to green if the answer is correct and red if the answer is wrong. You also want the sprite to move to a new position after each answer. How would you plan the order of blocks inside the if-else structure to achieve both effects correctly?

• Place the background change block outside the if-else block so it always runs, and put the sprite movement inside

• Inside the "if" section, place the block to switch backdrop to green and move the sprite; inside the "else" section, place the block to switch backdrop to red and move the sprite

• Use only the backdrop change block and ignore the sprite movement entirely

• Place all blocks after the if-else block so they run regardless of the answer

You are designing a Scratch 3 quiz with 3 questions. After each question, the quiz should check the answer and keep track of how many questions the player got right using a variable called "Correct Answers." At the end, if the player got all 3 correct, the sprite should say "Perfect Score!" otherwise it should say "Keep Practising!" How would you plan this using if-else?

• Use an if-else block only at the start of the quiz before any questions are asked

• Use an if-else block after each question to add to "Correct Answers," and then use another if-else block at the end to check if "Correct Answers" equals 3 to display the correct message

• Use a single if block at the end that only checks if the player got 1 question right

• Use a "stop all" block after the first question regardless of the answer

In Scratch 3, you want to create a quiz where the difficulty of the next question depends on whether the player answered the previous question correctly. If correct, the next question should be harder; if wrong, the next question should be easier. Which approach best uses if-else to plan this branching quiz structure?

• Always show the same question regardless of the previous answer

• Use an if-else block after each answer: in the "if" section, broadcast a message to trigger the harder question; in the "else" section, broadcast a message to trigger the easier question

• Use a "repeat" block to show all questions in order without checking answers

• Use only the "if" block and leave the else section empty so nothing happens when the answer is wrong

You are building a Scratch 3 quiz where the player has only 2 chances to answer each question. You need to plan how to use if-else and a variable called "Attempts" to track this. If the player answers correctly on the first try, they get 10 points. If they answer correctly on the second try, they get 5 points. If both attempts are wrong, they get 0 points. Which plan best describes this logic?

• Use a single if block that only checks the first attempt and ignores the second

• Use nested if-else blocks: first check if the answer is correct and Attempts equals 1 to give 10 points; else check if the answer is correct and Attempts equals 2 to give 5 points; else give 0 points

• Use a "forever" loop to keep asking the question until the player gets it right without tracking attempts

• Set the score to 10 always and subtract points at the end of the quiz

In Scratch 3, you are creating a quiz where a timer is running. If the player answers before the timer reaches 10 seconds, they get a bonus point. If they answer after 10 seconds, no bonus is given. You have a variable called "Timer." How would you plan the if-else structure to include this timer condition alongside checking if the answer is correct?

• Ignore the timer and only check if the answer is correct using a simple if block

• Use an if-else block where the condition checks if the answer is correct AND the Timer is less than 10; if true, add a bonus point; otherwise, do not add the bonus point

• Use a "wait 10 seconds" block before checking the answer so the timer is always over 10

• Use the timer only to stop the quiz and never use it inside an if-else block

You are planning a Scratch 3 quiz where the sprite gives a hint if the player's answer is wrong. The hint should only appear after the second wrong attempt, not the first. You have a variable called "Wrong Attempts." How would you use if-else and this variable to plan this feature?

• Show the hint after every wrong answer regardless of how many attempts have been made

• Use an if-else block inside the "else" section of the answer check: if "Wrong Attempts" equals 2, show the hint; otherwise, just increase "Wrong Attempts" by 1 without showing the hint

• Use a "stop all" block after the first wrong attempt so the quiz ends immediately

• Show the hint before the player even answers the question

In Scratch 3, you want to create a quiz where the player must answer 5 questions. At the end, the quiz should calculate the percentage of correct answers and display a message. If the percentage is 80% or above, the sprite says "Excellent!" otherwise it says "Good effort!" You have a variable "Correct Answers." Which plan best describes how to calculate and use if-else for this?

• Divide "Correct Answers" by 5 and multiply by 100 to get the percentage, then use an if-else block to check if the percentage is greater than or equal to 80 to display the correct message

• Use a "repeat 5" block and display "Excellent!" after every question without checking the score

• Only check if the player got exactly 5 correct and ignore all other scores

• Use a "set Score to 100" block at the start and subtract points for wrong answers without using if-else

You are creating a Scratch 3 quiz where the player can choose between two topics: Animals or Plants. Depending on the choice, a different set of questions should appear. How would you plan the if-else structure to handle this branching based on the player's topic choice stored in a variable called "Topic"?

• Show all questions from both topics regardless of the player's choice

• Use an if-else block where the condition checks if "Topic" equals "Animals"; if true, broadcast a message to start the Animals questions; in the else section, broadcast a message to start the Plants questions

• Use a "forever" loop to keep asking the player to choose a topic without ever starting the quiz

• Use only the "if" block and leave the else section empty so Plants questions never appear