Density & Viscosity

• Science
• Primary Education
• Age 12

Density & Viscosity

Viscosity & Flow

• Flow:  how a fluid moves. Flow is determined by Viscosity.
• Viscosity: how easily a fluid flows. Viscosity is determined by resistance to movement.

WHAT IS FLOW?

1. How a fluid moves
2. How a fluid dances
3. How a fluid stops
4. How a fluid talks

WHAT IS VISCOSITY?

1. How easily gases flow
2. How easily a fluid flows
3. How quickly ice melts
4. How bright the sun shines

When a fluid flows QUICKLY that means it has LOW VISCOSITY 

When a fluid flows SLOWER that means is has HIGH VISCOSITY 

CAN YOU THINK OF SOME LIQUIDS THAT FLOW QUICKLY?

CAN YOU THINK OF SOME LIQUIDS THAT FLOW SLOWLY?

WHEN LIQUIDS FLOW "SLOWLY"
THEY....

1. Have high viscosity
2. I dont know
3. Evaporate
4. Have low viscosity

WHEN LIQUIDS FLOW "QUICKLY"
THEY.....

1. Freeze
2. Have high viscosity
3. Have low viscosity
4. Dance

 LOW VISCOSITY 

LIQUID

HIGH VISCOSITY 

LIQUID

https://www.greatschools.org/library/cms/02/25802.pdf

What Is Density? 

•  Density explains why some objects float while others sink. 
• Density describes how much an object weights relating to its size.
• Every single substance and material has its own unique value for density. 
• Density tells us how particles and molecules are arranged in these materials. For example,  the more the molecules are spread out the  lower the density an object has, like air. In solids, the particles and molecules are tightly packed together,  and so the density is higher. 
• Density also applies to liquids. For example, if an object is less dense than water it will float, but if it is more dense it will sink. 

WHAT IS DENSITY?

1. Density explains why some objects float or sink
2. Density tells us how particles and molecules are arranged.
3. Density describes how much an object weights
4. All of the above

THE MORE THE MOLECULES ARE SPREAD OUT:

1. The lower the density an object has
2. The higher the density an object has
3. The brighter the object shines
4. The higher the rarity an object has

THE MORE THE MOLECULES ARE PACKED TOGETHER:

1. The more emptiness an object has
2. The less density an object has
3. The more air an object has
4. The more density an object has

IF AN OBJECT IS LESS DENSE THEN WATER:

1. It will float
2. It will sink
3. It will fly away
4. It will explode

WHAT OBJECTS DO YOU WILL SINK?

WHAT OBJECTS DO YOU THINK WILL FLOAT?