The Ultrasound (Distance) Sensor

This sensor lets you tell distance. It's really cool.
1) In your notebook, explain how you might fing this either fun or useful (or both).

The ultrasound sensor measures distance between the sensor and objects in front of it.

It works by sending out a sound wave, then it measures how long it takes for it to bounce back. In other words, it is measuring how long it takes it for the echo return. The longer, the further away the object is. 

Make sure the sensor is plugged into a port on the EV3 brick. Move the sensor so that it is pointing at a wall, back of chair or other object. On the EV3 app on the iPad, look at the lower right panel where it has the name of the robot. What happens when you  In your notebook, answer the following question:

2) What happens as you move the sensor back and forth?

You are going to make a program like the one at the left. For the program, you will click on the yellow tab at the bottom. Then you are going to put the move block where you make the robot move until it gets so close to a wall. After you get the program working properly, answer the following questions in your notebook:

3) What does the program do?

4) How does it do it?

For this, you are going to write a program that makes the robot approach a wall, stop 10 cm from the wall, turn 90 degrees, go the next wall, and stop 10 cm from the wall, and keep this up forever. It should be able to stay 10 cm from the wall for like forever.

You need to do the following:

Make comments to explain how the program works. To make comments, click on the purple tab at the bottom, and then move the comment to the center. Then double click on write the comments. 

5) Now, you need to make a screen shot (click the power bottom and the home bottom on the iPad Mini or the pwer bottom and the Volume bottom closest to the power bottom on the iPad Pro). Then share the screen shoot to Linus, Schoeder or Lucy or just take it to me.

6) In your notebook, you need to describe 3 things you learned while you did this.