Understanding Buoyancy
A Grade 7 science worksheet exploring the principles of buoyancy, Archimedes' principle, and density through various question types.
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Understanding Buoyancy
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Read each question carefully and answer to the best of your ability. Show your work for any calculations.
1. What is the upward force exerted by a fluid that opposes the weight of an immersed object?
Gravity
Friction
Buoyancy
Density
2. Which principle states that the buoyant force on a submerged object is equal to the weight of the fluid displaced by the object?
Newton's Law
Archimedes' Principle
Pascal's Law
Bernoulli's Principle
3. An object will float if its average density is than the density of the fluid it is in.
4. The amount of fluid displaced by a floating object is equal to the of the object.
5. A steel ship floats because of its shape, which allows it to displace a large volume of water.
True
False
6. An object that sinks has a buoyant force greater than its weight.
True
False
7. Explain why a block of wood floats in water, but a small pebble sinks.
8. Observe the diagram below showing an object submerged in water. Draw arrows to indicate the direction of the buoyant force and the force of gravity acting on the object.
Match each term on the left with its definition on the right.
9. Buoyant force
a. The amount of mass per unit volume.
10. Density
b. The tendency of an object to float.
11. Archimedes' Principle
c. Upward force exerted by a fluid.
12. Buoyancy
d. Buoyant force equals weight of displaced fluid.