Unit 2: Properties

The property being changed in this code is...

• centerX

• left

• right

• centerY

• fill

Answer explanation

Look at line 12. Notice that the fill property of the variable sky is being changed.

Which variable has it's centerX property set to 300?

• ball

• ground

• I'm not really sure

If you wanted to change the text in the variable called message:

• label.text('Bye')

• label.text = 'Bye'

• message.value('Bye')

• message.value = 'Bye'

• I'm really not sure

Answer explanation

The name of the variable is message. The name of the property is value. To change a property, you must do this message.value = 'Hello'.

If you want to move one end of the variable ground up:

• ground.y1 = 200

• ground.x1 = 200

• ground.y1 = 350

• ground.x1 = 350

• I'm really not sure

Answer explanation

To move one end of a line up, you have to change either the y1 property or the y2 property- not the x1 or x2. Changing the y1 from 300 to 200 will move it up. Changing it to 350 will move it down.

If you want to move one end of the variable ground up:

• ground.y1-1

• ground.x1-1

• ground.y1-=1

• ground.x1-=1

• I'm really not sure

Answer explanation

To move one end of a line up, you have to change either the y1 property or the y2 property. If you want to change the value of ground.y1 you must use +=. += means ground.y1=ground.y1+1 which means that the new value of ground.y1 equals the old value plus 1.

If you want to change the color of the background:

• background.fill = 'red'

• background.fill('red')

• background.color = 'red'

• background.color('red')

• I'm really not sure

If you want to make the box more transparent, you must change the opacity property like this:

• box.opacity+=50

• box.opacity-=50

• box.opacity+50

• box.opacity - 50

• I'm really not sure

Answer explanation

If you decrease the opacity, you increase the transparency. If you just use minus, then you don't change the opacity. You have to use -= to change the value of the opacity property for the box.

If you want to hide the variable ball, you need to change the visible property like this:

• ball.visible = True

• ball.visible = False

• ball.visible(True)

• ball.visible(False)

• I'm really not sure

If you want to hide the variable ball, you need to change the visible property like this:

• ball.visible = False

• ball.visble = False

• ball.visibe = False

• ball.vsible = False

• I'm really not sure

Answer explanation

If you misspell visible, it will not work and there will be no error message. It is very easy to misspell visible!

Every property applies to every shape

• True

• False

• I'm really not sure

Answer explanation

radius does not apply to rectangles.