Ecology Block 3 TLJ: Animal Ears Lab

1. Our lab on April 4, 2011 was on if you have big ears does it help you hear farther away. For example animals in the wild that have bigger ears so they can can hear if any predators are around. Some animals have bigger ears so they can find there food. So for our lab we are going to see how far you can hear a pen click with a regular ear and a enhanced ear.

2. So we are going to stand in front of some one that has a pen that clicks. Every time you hear it click you take one step back. You do that tell you can not hear the clicking anymore with a regular ear. Then when you are finished with that you measure how far you are away from where you started. After that you take a paper plate and cut a triangle in it then slide it behind your ear. Do the same process again and see if you get farther or shorter than you got with your regular ear.

Students	Distance with Normal Ear	Distance with Enhanced Ear
Jessie	27.9	52.9
Albert	55	50
Reese	45	60
Tangie	68.6	58.6
Brandon W.	58.6	78.6
Kasey	25.3	15.3
David	40.6	55.6
Emily P.	30.6	25.6
Sierra	53.8	55.6
Stephanie	34.4	47.8
Raeshar	57	63.7
Rayshawn	47.6	41.6
Montez	45.6	30.6
Devon	51.6	87.9
TJ	40.6	63.3
Travis	50.6	55.6
Conner	89.7	128.9
Brandon H.	58.6	87.2
Emily S.	64.7	76.3
Total	945.8	1135.1
Average	49.8%	59.7%

4. Did the addition of the larger ear make a difference in the distance at which you were able to hear the pen click? Explain

Yes it did but it depends on what is around you when you are doing this lab. Like for example the wind could be blowing really hard in your ears, the direction the wind is blowing, what is in front of you (column), people talking, and other noises that affect how far you can hear.

5. Animals with big ears

Kangaroo