Density
Viscosity
Buoyancy
Particles
Gases
100

A substance often used for cooking that is able to sit on top of water due to it being less dense.

What is Oil?

100

Molasses is a highly viscous liquid, and because of that, it is not able to do this as easily as other liquids, such as water.

What is Flow?

100

Cruise ships can float on top of water because they are a certain type of buoyant.

What is Positively Buoyant?

100

The particles of this state of matter a tightly packed together.

What are Solids?

100

Be sure not to heat your compressed gas container too much, otherwise this might happen to it. 

What is Explode?

200

The solid version of water, which can float on top of water due to it being less dense.

What is Ice?

200
While thick is often used to describe fluids with a high viscosity, this word is often used to describe fluids with a low viscosity.
What is Thin?
200

This will happen to items that are negatively buoyant.

What is Sink?

200

The force that holds most solids to the ground.

What is Gravity?

200

The layer of air that surrounds our planet.

What is the Atmosphere?

300

Finding the density of an object relies on knowing these characteristics of it. 

What is Mass and Volume?

300

High viscosity is caused by high amounts of this between particles as they slide past each other.

What is Friction or Collisions?

300

This neutrally buoyant item floats just below waters surface, and makes for a great summer time snack.

What is Watermelon?

300

Particles move much faster when this is applied.

What is Heat?

300
Modern airships use this safe lighter-than-air gas to make them positively buoyant. Unlike the Hindenburg!

What is Helium?

400

This characteristic of wood logs, which it shares with items such as tea bags, allows water to enter the air pockets housed within. 

What is Porous?

400

Doing this to a chocolate bar will greatly decrease its viscosity.

What is Heating or Melting?

400

This military metal command hub travels throughout the sea, switching between all three types of buoyancy depending on whether it wants to sink, surface, or stay level.

What is a Submarine?

400

This hypothesis states that everything that exists is made up of tiny pieces of matter.

What is Particle Theory?

400

The lighter-than-air gas that was used by the Hindenburg on its fateful voyage.

What is Hydrogen?

500

The density of an object with a volume of 51mL and a mass of 146g.

What is 2.86g/mL?

500

In contrast to liquids, increasing the temperature of this state of matter actually increases its viscosity because particles collide more frequently.

What is a gas?

500

This positively buoyant item might just save your life if you find yourself having fallen off of a ship.

What is a life preserver?

500

This method involves submerging an irregularly shaped object in a fluid to measure the volume of the fluid it pushes aside.

What is Displacement?

500

This Law states that if we reduce the volume of the space containing a gas, the pressure increases as long as the temperature stays the same.

What is Boyle's Law?

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