Buoyancy Basics
Explore the principles of buoyancy with this grade 4 science worksheet, covering floating, sinking, and why objects behave the way they do in water.
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Buoyancy Basics
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Read each question carefully and answer to the best of your ability.
1. What is buoyancy?
The color of an object
The ability of an object to float or sink in a liquid
How fast an object moves
The weight of an object
2. Which of these objects would most likely float in water?
A rock
A metal key
A wooden block
A coin
3. Objects that are less dense than water will float.
True
False
4. All metal objects will sink in water.
True
False
5. The upward force that a liquid exerts on an object is called .
6. A boat floats because it displaces enough to create an upward buoyant force.
7. Explain in your own words why a small pebble sinks but a large log floats.
Match each term on the left with its definition on the right.
8. Density
a. The amount of space an object takes up
9. Volume
b. How much 'stuff' is packed into a certain amount of space
10. Buoyant Force
c. The upward push of a liquid on an object
11. Look at the image below. Imagine dropping each item into a tub of water. Write 'F' if you think it will float and 'S' if you think it will sink.
Ship (before sinking)
Anchor
Lifeboat