Weight, Mass & Volume
You would weigh the same on the moon as you would on Earth.
No, your mass would be the same but not your weight.
What is density?
A measure of the mass per unit volume of a substance. Or, how heavy something is.
This animal was used to describe our buoyant force at the beginning of section 8.5.
The turtle. It showed upward force, and buoyant force.
Oil is usually less dense than water, so it _________ on the surface.
Floats.
This theory is used to explain why matter behaves the way it does.
The particle theory.
How are weight and mass the same?
They are both measures of something.
What 2 things does density depend on?
The mass of the particle, and how tightly packed the particles are.
Buoyancy is the upward force that a ________ exerts on an object.
Fluid.
The name of the airship that exploded because it had high hydrogen amounts in its hold.
Hindenburg.
The volume formula.
Volume = length x width x height
What is greater, a kilogram of gold or a kilogram of feathers?
They are both equal. You would just need a lot more feathers.
Generally speaking, liquids and solids are packed tighter than gases. True or false?
True.
in order for something to stay afloat it is important that the buoyant force equals the...
Water displaced by the object.
These two items have the same characteristic, one is in an animal and the other is in a man-made object.
A swim bladder and ballast tank.
Matter.
What is volume?
A measure of the amount of space an object or substance takes up.
A characteristic property of this substance is that it boils and freezes, can change between 3 states.
Liquid water.
This item measures different levels in different liquids.
Hydrometer.
If a fish were to sink in water, it would have to use this organ to become negatively, positively, or neutrally buoyant.
A swim bladder.
1000cm cubed is the same as 1000mL which is the same as ______
1L.
What discovered the theory of displacement?
Archimedes.
Balsa wood has a density of 0.12 grams per cm cubed. At this density, it would sink in distilled water that has a density of 1 gram per cm cubed? True or false?
False. It is lighter than the distilled water, therefore it will float.
This line allows observers to easily see whether a ship is floating high enough in water.
When positive buoyancy occurs, the object begins to float upward. What do you think happens with neutral and negative buoyancy?
With neutral buoyancy it stays at the same level, in negative buoyancy it sinks.
The oxygen in a fish's swim bladder comes from dissolved ____________ in the water.
Oxygen.