Buoyant Force and Archimedes Principle

Presentation

•

Science

•

8th Grade

•

Easy

•

NGSS

MS-PS2-2

Standards-aligned

Jennifer Fuller

Used 76+ times

FREE Resource

10 Slides • 7 Questions

Multiple Choice

The upward force exerted by a fluid is called the...

buoyancy force

density force

fluidity force

normal force

Archimedes Principle

Mrs. Fuller
8th Grade Science

Multiple Choice

What is a buoyant force?

The force that makes an object sink

The density of the fluid an object is submerged.

An upward force exerted on an object by a fluid.

The depth to which an object is submerged in a fluid.

Multiple Choice

How do steel ships float, even though steel is denser than water?

Boats are not made of steel

Boats can only float in salt water

The density of the steel is reduced by hollowing out the boat to increase its volume.

Multiple Choice

_______________ says that the weight of a fluid that is displaced by an object is equal to the buoyant force acting on the object.

Archimedes Principle

Aristotle's Equation

Aristophanes' Cloud

Anaximander's Apeiron

Multiple Choice

I place an object made of an unknown substance into a bucket of water and it sinks. The object must be _________ dense than water.

less

Explanatory video

https://www.youtube.com/watch?v=16HDJNoXQII

Multiple Choice

If the density of an object is greater than the density of water, it will

sink

float

fly

Multiple Choice

If an object sinks in a fluid, _____.

the density of the fluid is greater than the density of the object

the density of the fluid is less than the density of the object

the density of the fluid is equal to the density of the object

density has nothing to do with whether an object sinks or floats, only which state of matter the object is

Archimedes Principle

The Archimedes Principle says that the weight of the fluid that an object displaces is equal to the buoyant force acting on the object. In other words, the more water an object displaces, the more the water was pushing back on the object as it submerged.

The upward force exerted by a fluid is called the...

buoyancy force

density force

fluidity force

normal force

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