8/18/2019 CS AliceChapter1Questions HW

1/2

1.1

Object: an abstraction that contains the data and instructions to carry out tasks.

Class: A template definition of the methods and variables of a particular object.

Method: An action that is performed by the object, but does not give back feedback.

arameter: !imitations set on a method to make it more specific.

roperty: A trait of the object.

1."

Move is less specific and can refer to any of # objects, $hile move at speed refers to a specific direction and

specified rate.

1.%

Asking the object to e&ecute an action.

1.'

dancer turn right %

1.(

tree resi)e %

1.#

cheerleader turn to face camera

1.*

+ou $ould drag -o together into the method, and put actions in there. /or e&ample, if 0 $anted to make a tree

resi)e and move up 1 m 0 $ould drag -o together to the bo&, and put those methods under -o together.

1.

2he chicken is a composite object, because 0t contains more than one object. 2he chicken contains: !eft!eg, /oot,

3ightleg, /oot, 4eck, 5ead, 6pper!ip and !o$er!ip.

1.7

2he barn has building, $hich contains: front8indo$, roof, left-oor, right-oor, back8indo$, theleftMain3after, $hich includes: rafter1, post1, post", post%, post', post(, post#, post*, post, post7, rafter%,

rafter(,rafter*, rafter7, rafer11, rafter1%, rafter1(, rafter1#, rafter1', rafter1", rafter19, rafter, rafter#,

rafter', rafter". rightMain3after includes: rafter(, rafter*, rafter1, post1, post", post%, post', post(, post#,

 post*, post, rafter1(, rafter%, rafter", rafter', rafter7, rafter11, rafter1%, rafter#, rafter1', rafter1", rafter19,

rafter, post7, rafter1#.

1.19

8/18/2019 CS AliceChapter1Questions HW

2/2

+ou $ould go to the object tree and click the particular object. /or e&ample, if 0 $anted to access the

handle, 0 $ould click phonograph, then crank, $hich $ould lead me to handle.