This is actually what density means. How does this sink and float work? Some boats are massive, and would seem very dense, so how do they stay afloat? Now comes buoyancy, which is the opposite of gravity. But what is buoyancy? Think about what happens when you put an ice cube into a glass of water. As the ice cube displaces moves some of the water to make way for itself, the water level rises and the ice floats partially in and out of the water.
Gravity is pulling the ice cube down and the buoyant force is pushing it up. How far in or out of the water your ice cube stays depends on its density, as that is what the pushing and pulling forces are working against. Get a bowl or a bucket of water and collect a few objects around the house or from your garden.
This means they are more dense than the feathers and have a higher density. If we filled the shoebox with water and weighed it, and then compared that to the weights of the box of feathers and the box of rocks, we could predict which one would sink and which one would float.
Because the box of rocks weighs more than the same amount of water, it would sink. Because the box of feathers weighs less than the same amount of water, it would float. Have you ever noticed that when you get into the bathtub, the level of the water gets higher?
This is called displacement. You are welcome, Rohan! Courtney Mar 13, Wonderopolis Mar 13, Victoria Mar 6, Hi, I'm at school right now.
Why was the Titanic ship so big? Wonderopolis Mar 6, Firebolt Feb 11, Wonderopolis Feb 11, Um good question probably because the water is forcing the boat UP. Wonderopolis Feb 7, Aniyah Feb 6, Wow that's amazing how it's floating by itself. Wonderopolis Feb 6, I loved todays wonder! I was in Minnesota where if you put a boat on the lake it wouldn't fall through. I know that on the bottom of the boat it has a lot of air so it can float. Wonderopolis Feb 5, How do boats float if they don't have anything to paddle with?
And the person that drives it do they have to be strong to turn it? Wonderopolis Feb 8, Duck dynasty girl Feb 4, I think tomorrow's wonder will be how is blue cheese made. Wonderopolis Feb 4, Hi wonderopolis it's duck dynasty girl I wonder how do boats move and float at the same time???????
I learned that when somthing is light it can float but if something is hard it can't float it will sink. I am wodering what will be the other interesting thing that will be come up on wonderopolis! Thank you for the sharing! How do things float? Buoyancy helps lift the plastic from water. And the thing you want to float has to be lighter than the water. Anything can float if you shape it right even metal it all has to deal with buoyancy that is why plastic can float.
I think that how do boats float is a very good topic to explain about and to talk or learn about. Prediction: A Wolf from the big bad wolf or did it really happen. Boats float because the liquid pushes it up so it is able to float. If it is too heavy the boat will sink. I love you wonderopolis!!!!! I think tomorrow's wonder will be about the three little pigs. Nice guess, awesomegirl! Dear wonderopolis I think today's video was really cool I had never learned about buoyancy before and I think it is really cool!!!
Hi wonderopolis great wonder I thought boats had to have an engine to move or float or move do they have an engine? Crystal Feb 4, I really loved this wonder thanks for sharing it! I was interested in it like the zebras! Annon Feb 4, Brandon's 3rd Grade Feb 4, Pretty cool! We think tomorrow's wonder will be about fairy tales, tornados, or wind we live in Oklahoma where the wind comes sweeping down the plain! Antonio Feb 4, We're so happy you've learned something new today, Antonio!
Nice work, Wonder Friend! Jesse T. Feb 4, This is so cool that is why boats don't sink. I always thought the rock would float and the boat will sink.
Gina M. I remember when I used to play with toy boats. Those were some good times. Yeah, well, I liked today's Wonderopolis. Jade Feb 4, I think that the way boats float is very cool I like this one. Andre'yanna Feb 4, Thanks that's so cool I never knew how that worked. I guess you learn something everyday! Wow that's very interesting can't wait to read another wonder.
Goneau's Class Feb 4, Goneau's Second Grade Class We were wondering Can a boat still float when it gets damaged above the water? How much do large boats weigh? Is a canoe shaped different on the bottom than a cruise ship? How many people can a large cruise ship hold? How do aircraft carriers float with all the heavy aircrafts? What kind of fuel does a large boat need to run?
How fast can a ferry boat travel in one hour? Mystery Feb 4, The "Titanic" was made of Titanium which is sinkable. Beaux and Kenny Feb 4, It is cool that wood floats but how does a boat float it is much bigger and made at metal, From Beaux. I learned that if the density is lower than the weight of the object, it sinks.
From Kenny. Even though the boat is bigger it still has more density which makes it heavier but why does it not sink also medal is heaver. From Beaux. So actually the more matter an object has, the higher chance it has of sinking.
Ryan M Feb 4, Why do rocks sink then a boat a boat is big and heavy and a rock is heavy too but lighter. Now why don't they both sink? So if a ship is hit by an iceberg a hole is created in the side of the ship's hull so then water takes up the space inside the ship where there is no water and it is dry so then the ship fills up with water until it sinks. Idk person Jan 27, Bob for alabama Feb 4, Miguel Navarro Feb 4, Thanks, Wonder Friend Miguel!
We Wonder what you learned about floating boats today? Pink Feb 4, Thanks so much, legacy82! We're glad this Wonder really floats your boat! They float because it is a shell that contains no water. Roberts' Class Feb 4, Meleeda Feb 4, Well thank so much, Meleeda! Bayko's Class Feb 4, We think tomorrow's wonder of the day will be about three little pigs. Such a great guess from our Wonder Friends in Ms. Bayko's Class today!
Plunkert's Class Feb 4, Good Morning, Wonderopolis! Thank you for today's awesome wonder! We are still wondering some things When a boat goes into the water, why doesn't the water rise?
Or does it and it's just hard for us to tell? Do bigger boats float better than smaller boats because they take up more space in the water? Maybe the Wonder will be, "Why does the wolf want those particular pigs?
Have a great day! It's our th day of school! Jusin Feb 4, How cool, Jusin! We Wonder where you have traveled? What an adventure! Miss Hobson's Kindergarteners Feb 4, Thank you so much for teaching us about how boats float! We now know why the water rises when we get in the tub! We also now know about buoyancy and how boats and objects float!
Have a wonderful day! Kenneth V. I mostly knew about this but it was cool. I think tomorrow's wonder is about pufferfish. Hess' Class Feb 4, Thoughts: We learned that when heavy objects are shaped the right way, they can float. We're curious how many different types of shapes can be used so that items float. Where do boats come from? Plastic boats will float because they are less dense than the water.
Who invented the first boat? Why do wolves eat pigs? Do wolves have emotions? When was the original story the Three Little Pigs written? Who invented boxing? Can pigs eat wolves? How do buildings collapse? How many different variations of The Three Little Pigs are there? How are hurricanes formed? Why do we sneeze? Have a great day. Wow I didn't know that about boats thanks for teaching me somthing new every day. By the way I'm in Mrs. Hess' class I will go to school in 30 minutes. How did RMS Titanic sink since it said it's not sinkable in the book of mine??
Have you ever been to a boat? Jagger Sep 18, How do they stay on top of the water and not sink? The king had a crown made out of a chunk of pure gold by a local craftsman. He weighed the crown, a chunk of gold and a chunk of silver. He put each of them in the water one by one, and wrote down how high the water level rose with each object.
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