Science · Topic 39 of 64
Density
⭐ MasteredDensity compares how much mass is packed into a space. Objects that are more dense than water sink, and less dense objects float.
💡 Fun fact
A block of iron sinks in water, but a huge steel ship floats because it contains a lot of air.
All about Density
Density compares how much mass is packed into a given volume. A material with a lot of mass in a small space is very dense.
Density explains why some objects sink and others float. A ship is shaped to hold lots of air, so its average density is lower than water.
🎮 Try it yourself!
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Real-life uses of Density
- Predicting whether objects will float
- Choosing materials for boats and bridges
- Understanding why hot air rises
Frequently asked questions about Density
What is density?
Density is the mass of an object divided by its volume.
Why does oil float on water?
Oil is less dense than water, so it floats on top.