Coding Units 1-4 Review

Front

How does Tracy start when you first open up Python?

Back

Pen down and facing right

Answer explanation

When you first open Python, the turtle starts with the pen down and facing right, ready to draw. This is the default starting position for the turtle graphics module.

Front

Which of the following is not an accurate description of the location of each point in Tracy's grid world? The point (0,0) is in the center of the screen., The point (200,-200) is at the bottom right corner of the screen, The point (-200,0) is on the bottom of the screen, The point (-200,-200) is at the bottom left corner of the screen

Back

The point (-200,0) is on the bottom of the screen

Front

The command circle(30) will tell Tracy to draw a circle of diameter 30 units.

Back

False

Answer explanation

The command circle(30) specifies the radius, not the diameter. Therefore, it instructs Tracy to draw a circle with a radius of 30 units, making the statement false.

Front

Which command would make Tracy execute an action the quickest? Options: speed(0), speed(1), speed(5), speed(10)

Back

speed(0)

Answer explanation

The command speed(0) sets Tracy's speed to zero, meaning she will execute the action immediately without any delay.

Front

The code shown draws 3 circles on the screen. If I wanted to alter this loop to draw 15 circles, how many lines would my code be?

Back

3

Answer explanation

To draw 15 circles, you can modify the loop that currently draws 3 circles. The loop structure remains the same, so the number of lines of code needed to implement this change is still 3, making the correct answer 3.

Front

The following program will have Tracy draw a square with each side length measuring 60 pixels.

Back

True

Answer explanation

The program correctly instructs Tracy to draw a square with each side measuring 60 pixels, confirming that the statement is true.

Front

If Tracy was facing up, what direction would she be facing if the following code was run?

Back

down

Answer explanation

If starting facing up, Tracy would move to the right 90 degrees putting her facing right. Then, Tracy would move left 90 degrees bringing her back to facing up. Then, Tracy would turn right 180 degrees rotating her from up to now down.

Front

Using the given code, which lines of code will be repeated three times? Options: 3 and 4, 3, 4, 5, and 6, 2, 3, 4, and 5, 3, 4, and 5

Back

3, 4, and 5

Answer explanation

Lines 3, 4, and 5 are inside a loop that iterates three times, meaning these lines will be executed repeatedly. Therefore, the correct answer is '3, 4, and 5'.

Front

I want Tracy to cross from one side of the screen to another. The code shown won't do that. Which correction in the code will NOT result in Tracy being able to go all the way across the screen? Options: Change line 4 to for i in range(40):, Change line 5 to forward(20), Change line 4 to for i in range(25): and change line 5 to forward(16), Change line 4 to for i in range(15): and change line 5 to forward(25)

Back

Change line 4 to for i in range(15): and change line 5 to forward(25)

Answer explanation

Changing line 4 to for i in range(15): and line 5 to forward(25) results in only 15 moves of 25 units each, totaling 375 units, which is insufficient to cross the screen. The other options allow Tracy to cross.

Front

What would be the result of this program? Options: 4 circles of radius 50 extending all the way across the screen., 2 circles of radius 50 extending halfway across the screen., 4 circles of radius 100 extending all the way across the screen., 2 circles of radius 100 extending halfway across the screen.

Back

4 circles of radius 50 extending all the way across the screen.

Answer explanation

The program creates 4 circles, each with a radius of 50. Since the total width of 4 circles of radius 50 is 400, they extend all the way across the screen, confirming the correct answer.