2006-08-19 21:16:22 · 15 answers · asked by Ruchik 1 in Education & Reference ➔ Homework Help
i dont know !!! :)xj
2006-08-19 21:21:32 · answer #1 · answered by ❤נαcкiε❤ 5 · 0⤊ 1⤋
Most insects that can walk on water can do so because they are so light weight. In floating or walking on water, the object, in this case an insect must displace the same weight of water equal to their body weight. Since the insects weighs so little they must displace a very small amount of water. Often the surfact tension of the water is not even broken.
Hope this helps.
2006-08-19 21:25:53 · answer #2 · answered by Mav 6 · 0⤊ 0⤋
From Madscience:
"Ryan,
Objects can float for several reasons.
If an object or a material has a lower density than the liquid in which
it is placed it will float. When we consider the liquid to be water: oil
and ice cubes float, most types of wood will float, the rock type pumice
will float, and some types of plastic will float. The wood, rock, and
plastic that float all are less dense than the water because they have a
lot of air trapped within their molecular structure (between the elements
from which they are made) and this causes them to be less dense than water.
We also can see that objects built from materials that have densities
greater than that of water can float. Ships of all types are commonly
made from metal, wood, concrete, plastic, fiberglass and such. When a
craft is designed so that when "it is immersed in a fluid it is bouyed up
by a force equal to the weight of the displaced fluid" it will float.
This is called the "Archimedes' Principle". Ships are designed so that
large surface areas are in contact with the water. This creates upward
forces that do not allow the ship to sink even though it is made from
materials that are more dense than water. Archimedes' Principle also
explains why helium filled balloons float in the air.
Water also has a strong surface tension property. In simpler terms,
the water molecules on the surface stick together quite strongly and form
a thin, membrane like, layer protecting what's underneath (think of this
like the plastic wrap used to protect your sandwich.) This surface
tension is why small insects can be observed walking on water. You can,
to demonstrate, float a metal sewing needle in a bowl of calm water by
very gently placing it on the surface. However if you simply drop the
needle into the bowl or if you disturb the bowl the needle will sink. You
can also cause the needle to sink by placing a drop of soap (dish
detergent) in the bowl because the soap destroys the water's surface
tension property.
John Haberman, Physical Chemist"
Some Lizards can walk on water, too.
http://news.nationalgeographic.com/news/2004/11/1116_041116_jesus_lizard.html
2006-08-19 22:08:29 · answer #3 · answered by Bob 2 · 0⤊ 0⤋
Some insects can walk on water because they do not break the surface tenson of the water. This is different than being buoyant, which allows something to float on the water after the surface tension has been broken.
2006-08-19 21:44:50 · answer #4 · answered by Curious1usa 7 · 0⤊ 0⤋
water has a quality known as surface tension. its what makes the surface of the water almost elastic in a way. some insects are soo light that their weight doesn't allow them to break the surface of the water which allows them to walk over it.I another way we can say that surface tension balances their weight
2006-08-20 21:40:28 · answer #5 · answered by kushagrakapoor2006 1 · 0⤊ 0⤋
insects can walk on water because of the surface tension between the molecules of water.
2006-08-22 04:54:00 · answer #6 · answered by angelz 1 · 0⤊ 0⤋
water has a quality known as surface tension. its what makes the surface of the water almost elastic in a way. some insects are soo light that their weight doesn't allow them to break the surface of the water which allows them to slide over it.
2006-08-19 21:30:27 · answer #7 · answered by Anonymous · 0⤊ 0⤋
water possesses an elastic property called surface tension. it tends to reduce its surface area. by an ant walking on the surface the the tension on the surface is not much to cut elastic membrane( water acts as such). hence insects walk on water with ease.
2006-08-21 19:13:21 · answer #8 · answered by Anonymous · 0⤊ 0⤋
I know of one spider that uses the hair on its legs to help it walk on water.
2006-08-19 21:54:15 · answer #9 · answered by jd 3 · 0⤊ 0⤋
ask a Jesus freak they will tell you that only Jesus can walk on water but then again they don't know any thing
2006-08-19 21:23:11 · answer #10 · answered by Anonymous · 0⤊ 0⤋
With legs........n those who also can walk on surface as well as water is known as Amphibians.......
2006-08-19 22:38:42 · answer #11 · answered by Anitha S 2 · 0⤊ 0⤋