Buoyancy Basics: Grade 9 Science
This worksheet covers fundamental concepts of buoyancy, including Archimedes' Principle, density, and flotation for Grade 9 science students.
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Buoyancy Basics: Grade 9 Science
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. 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 First Law
Archimedes' Principle
Pascal's Principle
Bernoulli's Principle
2. An object will float if its average density is:
Greater than the fluid's density
Less than the fluid's density
Equal to the fluid's density
Independent of the fluid's density
1. Buoyancy is the force exerted by a fluid that opposes the weight of an immersed object.
2. An object sinks if the buoyant force is than the object's weight.
3. The unit for density is typically or .
1. A heavy object will always sink, regardless of its shape or material.
True
False
2. The buoyant force acting on an object submerged in water is greater in saltwater than in freshwater.
True
False
1. Explain why a steel ship floats, even though steel is much denser than water.
2. Describe how a submarine is able to submerge and resurface.
1. A block of wood has a volume of 0.05 m³ and a mass of 40 kg. Will it float or sink in water (density = 1000 kg/m³)? Show your calculations.
2. An object displaces 2.5 L of water when fully submerged. What is the buoyant force acting on the object? (Density of water = 1 g/mL, g = 9.8 m/s²)