CS: Scratch Concepts: Sprites, Loops, and Events Worksheet

Question 1

In Scratch, what is a sprite? Give one example of something that could be a sprite in a project.

Accepted Answer

A sprite is an object or character in a Scratch project that can have code, costumes, and actions. A cat, a ball, or a spaceship could be a sprite.

Question 2

A Scratch project has a cat sprite and a beach backdrop. Which one is the sprite, and which one is the setting?

Accepted Answer

The cat is the sprite because it is the character that can be programmed. The beach backdrop is the setting because it shows where the action takes place.

Question 3

Which event block would you use to start a program when the green flag is clicked?

Accepted Answer

You would use the when green flag clicked event block to start a program when the green flag is clicked.

Question 4

A sprite has these blocks: when green flag clicked, move 10 steps, move 10 steps, move 10 steps. How many total steps does the sprite move?

Accepted Answer

The sprite moves 30 total steps because 10 plus 10 plus 10 equals 30.

Question 5

A sprite has these blocks: when green flag clicked, repeat 4, move 5 steps. How many total steps does the sprite move?

Accepted Answer

The sprite moves 20 total steps because it moves 5 steps each time and repeats 4 times.

Question 6

Explain why a repeat block is useful when you want a sprite to do the same action many times.

Accepted Answer

A repeat block is useful because it lets the sprite do the same action many times without writing the same block over and over. It makes the code shorter and easier to change.

Question 7

A sprite should dance the whole time the project is running. Should you use a repeat block or a forever block? Explain your choice.

Accepted Answer

You should use a forever block because the sprite needs to keep dancing for the whole project. A repeat block stops after a set number of times.

Question 8

A sprite has these blocks: when space key pressed, say Hello! for 2 seconds. What makes the sprite say Hello?

Accepted Answer

Pressing the space key makes the sprite say Hello because the code starts with the when space key pressed event block.

Question 9

A student wants a dog sprite to bark when it is clicked. Which event block should start the code?

Accepted Answer

The code should start with the when this sprite clicked event block because the dog should bark when the user clicks that sprite.

Question 10

A sprite has these blocks: when green flag clicked, repeat 3, next costume. What happens to the sprite when the green flag is clicked?

Accepted Answer

The sprite changes to the next costume 3 times because the next costume block is inside a repeat 3 block.

Question 11

Look at this plan: When the green flag is clicked, the sprite should move 10 steps, wait 1 second, then turn 15 degrees. Put the actions in the correct order.

Accepted Answer

The correct order is move 10 steps, wait 1 second, then turn 15 degrees. Scratch runs blocks from top to bottom in a stack.

Question 12

A student puts a move 10 steps block on the screen, but the sprite does not move when the green flag is clicked. What important kind of block might be missing?

Accepted Answer

An event block might be missing. The sprite needs an event block, such as when green flag clicked, to know when to start running the code.

Question 13

A sprite starts at the center of the stage. Its code says: when right arrow key pressed, change x by 10. What happens when the right arrow key is pressed 5 times?

Accepted Answer

The sprite moves 50 units to the right because it changes x by 10 each time and the key is pressed 5 times.

Question 14

A game has a player sprite and a star sprite. The star should disappear when the player touches it. What condition could be used in the code?

Accepted Answer

The code could use a touching player condition to check whether the star is touching the player. If the condition is true, the star can hide.

Question 15

Describe a simple Scratch project that uses at least one sprite, one event, and one loop.

Accepted Answer

One example is a butterfly sprite that starts moving when the green flag is clicked. A forever loop can make the butterfly flap its wings and move around the stage.

CS: Scratch Concepts: Sprites, Loops, and Events

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