Savannah&Mariia

= **﻿ __Gliders__** =

**Question -**
Does the lengh of the srtaw effect how far the distance it goes

**Hypotheisis -**
If we cut the straw even shorter it will go farther.

**What you will need -**
- 1cm Graph Paper - Straws - Tape
 * - Scissors **

**ProtoType Details-**
Our Glider is 2cm wide in the back and 12cm around, We over lapped two 1cm squares to make one. We taped the paper into a circle and then tapped the straw to it.

The back is 3cm wide and 18cm around and is taped on the inside and out The lenght between of the straw and paper is 19.5cm

We changed 4 things -
We Cut off 5cm We cut off 7cm We cut off 10cm We also cut off 15cm

=__ ** Identifying our Variables ** __ ** ... ** =

** The lenght between the 2 rings was - **
15 1/2cm 8 1/2cm 17cm 5cm

** Our control variables are - **
-we need to use the same force -when we throw them the same way, at the same place -At the same place so there will be no wind to effect how far it goes. - throw it with your wrists -keep the plane at the same height. -Keep it inside - same length straw on each plane. -It has to have to same size rings. -measure from the front of the glider, not the back -Start at the same place.

** Procedure for testing - **
You should be holding the glider between you pointing finger and your thumb and holding in in the middle of the straw, do not use enough strengh to bend the straw.. only hold it lightly like you would hold a baby chicken.

1.Take a glider and hold it by your shouder, your elbow should be held into your side and your arm should be pointed straight up. 2. Pull your arm back slowly and then realease with the force of knocking on a door with your knucles. 3. Measuse the lenght of how far it goes by a measuring right up to the tip of the glider. 4. Reapeat this same steps for each glider.  The straw that had 5cm cut off had 444.3  The straw that had 7cm cut off was 236.8  The straw that had 10cm cut off was 166.1  The straw that had 15cm cut off was 48.9   || __**Conclusion**__ **-** Our hypothesis was disapproved, as the length of the straw decreased the distance the glider traveled decreased too. The evidence I have to support this is the graph that shows the more we cut off the starter distance was traveled. The evidence we have to support this is that the longest straw traveled 533.2cm when the shortest straw only when 48.9cm. Our data is not completely reliable because we could not completely control how we threw it, the force we used or keep the gliders from being a little damaged, some were bent and others where fine. If we could have done that the results could have come out differently. To better confirm our results we would keep every glider separate and not let them bend, get stepped on ECT. We would also put the exact amount of tape on each glider. Also because of only being Human we could not make sure that each was cut perfectly.
 *  Claim ||  Evidence (cm)  ||
 *  We claim that that the length of the straw effects the distance traveled, the more that gets cut off the shorter distance it goes. ||  The proto type went 533.2


 * glider || 1 || 2 || 3 || 4 || 5 ||  ||
 * 15 || 95cm || 72.5cm || 119cm || 1cm || 52 cm || 48.9 cm ||
 * 10 || 147.5cm || 275.5cm || 220cm || 155cm || 180cm || 166.1 cm ||
 * 7 || 205 cm || 222.5 cm || 270 cm || 240 cm || 246.5cm || 236.8 cm ||
 * 5 || 310 cm || 537.5 cm || 110 cm || 931.5 cm || 332.5 cm || 444.3 cm ||
 * 0 || 250cm || 580cm || 758cm || 392 cm || 686 cm || 533.2 cm ||


 * amount cut off straw (cm) || Average ||
 * 15 || 48.9 ||
 * 10 || 166.1 ||
 * 7 || 236.8 ||
 * 5 || 444.3 ||
 * 0 || 533.2 ||