2. . Tides can be good because they clean harbors by
carrying waste material into the ocean (source
6)
. They can be bad by polluting the ocean because
they carry the waste into the ocean
. If they get to big they can cause some damage
(source 7)
.
3. .tides are formed by the pull of gravity between
the earth, moon and the sun (source5)
. Scientist say that neap tides are formed by the
sun and moon not being aligned so their forces
will cancel each (source 1)
. Scientist say that lunar tides are formed by the
earth and the moon being attracted to each
other ( source 1)
. Scientist say that spring tides are formed when
the sun and moon are aligned it creates a very
strong gravitational pull causing a lot of high
and low tides (source 1)
4. .scientist can predict tides through tide gauges
(source 2)
This is a picture of a tide gauge
What will happen in the future?
.in the future tides should still exists long as we
have the moon sun and the earth
5. .tides can occur any where if there is a body of
water
.tides occur basically everyday (source 2)
.there is usually a high tide and a low tide
everyday (source 4)
This is a picture of the
ocean
6. .tides were discovered in 1686 by Isaac Newton
(source 3)
.Isaac Newton was the first person to explain how
tides are made
This is what Isaac
Newton looks like
7. . Tides are like ocean currents and they are like
baby tsunamis. They both occur in the ocean
and they create waves in the ocean.
This is what a tsunami
Looks like
Why do tides occur?
.scientist say that tides occur because of the
gravitational pull between the earth moon and
sun (source 5)
8. Source 1: Keith Cooley. Moon tides. 2002. March 7,2012.
http://home.hiway.net/~krcool/astro/moon/moontides/
Source 2: Wikipedia. March 2,2012. march 7,2012.
http://wikipedia.org/wiki/Tides
Source 3: Enchanted Learning. 2012. march 7,2012.
http://www.enchantedlearning.com/subjects/astronomy/moon
tides.shtml
Source 4:San Diego Tide Chart. Neal Hribar.2012.March 7,2012.
http://www.hribar.com/sandiego-tide-chart.html
Source 5: Brainpop. 2012.March 7,2012.
http://www.brainpop.com/
9. Source 6: Big site of amazing facts. 2012. March
7,2012.
http://www.bigsiteofamazingfacts.com/what-caus
10. If the moon was bigger and heavier,
would tides be bigger?
11. If I put a both a big and heavy bowl and a small
light bowl into a bucket and apply pressure, to
represent the gravitational pull between the
moon and the earth, then the big bowl should
create a bigger tide because it has more
gravity/pressure to apply to the water which
should increase the tide size.
12. . One bucket that measures liters
. 2 different sized cups, bowls or a beach balls
.1 towel
.1 ruler or something to measure with
.tape
.paper and pencil to record the answer
13. Independent-
.the size of the 2 bowls, and how heavy they are
.how much pressure you push
.how much the bowls weigh
. how far you push down
Dependent-
.how big the tides get
Controlled-
.how much water in the bucket
. how big the bucket is
.how big the ruler is
14. 1. Fill the bucket up about 5 liters
2. hold the ruler onto the side of the bucket
3. See how high the water measures up to the
ruler
4. Tape something heavy to the biggest bowl
5. Stick one of the bowls into the bucket of water
6. Push down until the bowl hits the bottom of
the bucket
7. Let the water settle for about 30 seconds
8. Record how high the water gets
9. Do the same thing but with the other bowl
10. Do at least 2 trials
15. With the small moon, the water raised ¼ of an
inch.
The water started at 5 inches and it raised to 5 ¼
inches.
With the big and heavy moon, the water raise ½
inch.
The water started at 5 inches and raised up to 5 ½
inches.
For trial #2 the results were the same as in trail #1
16. This is a picture of when I was testing the small moon.
I am pushing the small bowl onto the bottom of the
bucket which represents the gravitational pull between
the moon and earth. The water rising represents high
tides.
17.
18. Data on tides from San Diego
This is a graph on all of the tides that scientist predict
will happen in San Diego over the month of March, but
over different years.
feet
19. From this experiment, the bigger and heavier moon
caused the tides to be greater than the smaller lighter
moon. My hypothesis was correct. It was that the
bigger moon would create bigger tides than the smaller
moon because, the bigger moon had more
pressure/gravity to apply which should increase the
tide size, and it did.
If I could change this experiment I would have used 4
different moons (bowls )(2 heavier and 2 lighter). So
then I can really see if the big heavy moon creates
bigger tides.
