What criteria are we going to use to determine which water gun is the best?
Water Gun In-
vestigation Data
Criteria/Water Gun
Splash fire
Tane's gun
Shark gun
Caelin's gun
Anna's gun
How far it shoots
3m
4
6m
2
3m
4
8m
1
5m
3
How much water it
holds
3 cup
3
1200 mls
2
3cup
3
1l 500ml
1
180ml
4
The payload - num- 555
ber of shots in one 3
load
93
2
36
4
156
1
21
5
How much time be- 9sec
fore it has to be re- 3
loaded
12.50sec
4
5sec
2
17.19sec
5
2.89
1
Can it knock over
the cup?
No
2
No
2
No
2
No
2
How long it takes to 23 sec
5
fill
7.47sec
3
5sec
2
17.19
4
2.89
1
Its weight when full 1kg2
1.8kg3
1kg2
2kg4
200gm1
How much water in 22ml
5
one shot
150ml
2
90ml
3
160ml
1
20ml
4
Speed of one shot
3sec3
2.00sec2
1sec1
1sec1
7sec4
Ease of use 1-5
3
2
1
1
5
Fun factor 1-5
3.5
3
2
2
3.5
Overall score
25
3
19
1
22
2
22
2
28
4
Yes
1
Method
1. We shot the water gun then measured the water with a metre wheel to measure
the distance of one shot.
2. We poured the water into a measuring cup to measure the capacity of the gun.
3. We shot the gun and counted the payload
4. We got the timer and timed how long one shot took.
5. We shot the water gun at the cup to see which water gun was powerful enough
to knock it over.
6. We used a timer to time how long it took to fill up the gun
7. We used the scales to measure the weight of a water gun
8. We shot 1shot into the measure to measure the capacity if 1shot
9. We shot the water gun and stopped it when all of it hit the ground
10. Because it looked the cools gun1
Evaluation
Tane's gun got an overall score of19 which means it was the best gun overall. We
liked this gun because it has a big tank so holds lots of water and it looks cool too.
Although Caelin's gun came first in 6 investigations his gun came fourth in a others making his gun come second overall.