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What has a higher density cold or hot water?
Cold water has a greater density than hot water.
How is density related to the flight of a hot air balloon?
Density is related to the flight of hot air balloons because the more density the harder it is to get of the ground.
What things have density?
The liquid have density.
How can a hot air balloon Demonstrate the concepts of Buoyancy and Density?
By rising when filled with lower density (hot) air than that surrounding it.
What happens to the density of air molecules as you increase in altitude?
the density decreases
What happens to the density of air as it's temperature increases?
Becomes lighter and rises, the principle of hot air balloons.
What happens when its hot outside?
Things Melt, people go outside lots of fun summer things
A hot air balloon rises because?
The molecules in hot air (or any gas) are more spaced out and therefore less dense. As you probably already know from the oil & water experiment we all did in primary school, things with less density float over things with greater density.
What happens in a convectuion current?
Hot fluid flows upward (because its density is lower), causing cooler fluid to flow downward.
What has a higher density cold or hot water?
Cold water has a greater density than hot water.
Why do density current happens?
why do density currents hapen?
What happens to density of rocks as it cools?
the density increases
How is density related to the flight of a hot air balloon?
Density is related to the flight of hot air balloons because the more density the harder it is to get of the ground.
What things have density?
The liquid have density.
What happens to mass when density decreases?
The density goes down.
What happens to the density of air as you increases in altitude?
the density decreases
Why does happen in the atmosphere?
For the same reason that it happens in other fluids. The hot air (in this case) has a tendency to rise, and colder air, to sink, due to differences in density.
