Scratch Encore Final Exam

What is the primary purpose of creating variables in Scratch?

• To store and manipulate data

• To create animations

• To draw shapes

• To play sounds

Answer explanation

To store and manipulate data

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DOK Level 1: Recall

Which block would you use to create a variable in Scratch?

• "When green flag clicked"

• "Set my variable to 0"

• "Create variable"

• "Change my variable by 1"

Answer explanation

To create a variable in Scratch, you would use the block 'Create variable'. This block allows you to define a new variable and give it an initial value.

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DOK Level 1: Recall

How can you use a conditional statement to make a sprite move only if a certain key is pressed?

• Use the "forever" block

• Use the "if" block with a "key pressed?" sensing block inside it

• Use the "repeat" block

• Use the "wait until" block

Answer explanation

Use the "if" block with a "key pressed?" sensing block inside it to make a sprite move only if a certain key is pressed.

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DOK Level 2: Skill/Concept

• 1

• 2

• 4

• 16

Answer explanation

The result of using the operator block \(\sqrt{4}\) in Scratch is 2, as the square root of 4 is 2.

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DOK Level 1: Recall

Which movement block would you use to make a sprite move 10 steps forward?

• "Move 10 steps"

• "Turn 15 degrees"

• "Go to x: 0 y: 0"

• "Glide 1 secs to x: 0 y: 0"

Answer explanation

To make a sprite move 10 steps forward, you would use the 'Move 10 steps' movement block. This block specifically instructs the sprite to move a set distance in the specified direction.

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DOK Level 1: Recall

How can you use sensing blocks to detect if a sprite is touching the edge of the stage?

• Use the "touching edge?" block

• Use the "key pressed?" block

• Use the "mouse down?" block

• Use the "distance to mouse-pointer" block

Answer explanation

Use the "touching edge?" block to detect if a sprite is touching the edge of the stage.

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DOK Level 1: Recall

Describe a scenario where you would use a variable to keep track of a score in a game. Explain how you would implement this in Scratch.

• Use a variable to store the score and update it whenever the player earns points.

• Use a list to store the score and update it whenever the player earns points.

• Use a broadcast message to store the score and update it whenever the player earns points.

• Use a costume change to store the score and update it whenever the player earns points.

Answer explanation

Use a variable to store the score and update it whenever the player earns points.

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DOK Level 3: Strategic Thinking

How would you use a conditional statement to make a sprite say "Hello" only if the score is greater than 10?

• Use the "if" block with the condition "score > 10" and place a "say 'Hello'" block inside it.

• Use the "repeat" block with the condition "score > 10" and place a "say 'Hello'" block inside it.

• Use the "forever" block with the condition "score > 10" and place a "say 'Hello'" block inside it.

• Use the "wait until" block with the condition "score > 10" and place a "say 'Hello'" block inside it.

Answer explanation

Use the 'if' block with the condition 'score > 10' and place a 'say 'Hello'' block inside it.

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DOK Level 2: Skill/Concept

Explain how you would use operator blocks to create a countdown timer in Scratch.

• Use the "subtract" operator block to decrease the timer variable by 1 every second.

• Use the "add" operator block to increase the timer variable by 1 every second.

• Use the "multiply" operator block to decrease the timer variable by 1 every second.

• Use the "divide" operator block to decrease the timer variable by 1 every second.

Answer explanation

Use the "subtract" operator block to decrease the timer variable by 1 every second.

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DOK Level 3: Strategic Thinking

Which movement block would you use to make a sprite glide to a specific position on the stage?

• "Move 10 steps"

• "Turn 15 degrees"

• "Go to x: 0 y: 0"

• "Glide 1 secs to x: 0 y: 0"

Answer explanation

To make a sprite glide to a specific position on the stage, you would use the 'Glide 1 secs to x: 0 y: 0' movement block.

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DOK Level 1: Recall