Science Experiment: The Density of Water

Introduction

• Presenter: Kate from Nano Girl
• Experiment theme: Sea water density
• Ideal for a beach visit during summer

Materials

• Three glasses of water:
  • Tap water (drinking water)
  • Super salty water (with 5-6 tablespoons of salt)
  • Sea water (collected from a nearby beach)
• Eggs (one for each water type)

Experiment Steps

Tap Water

• Place an egg in tap water
• Observation: The egg sinks to the bottom

Super Salty Water

• Create super salty water with 5-6 tablespoons of salt
• Place an egg in the super salty water
• Observation: The egg floats immediately

Sea Water

• Use sea water from a nearby beach
• Place an egg in the sea water
• Observation: The egg is partially floating, not fully
• Action: Added one spoonful of salt and stirred well
• Result: The egg began to float after increasing the water's density

Explanation

• Density: Measure of how much 'stuff' is in a given volume
  • Adding salt increases water density
  • Denser water can hold more weight (egg floats)
• Variation in Seawater: Salinity varies by location (e.g., different beaches)

Conclusion

• Experiment shows the impact of salt on water density
• Encouragement: Try this experiment at the beach to test sea water salinity

Sign-Off

• Presenter wishes everyone an awesome summer and to enjoy the beach
• Reminder to use seawater for further experiments on salinity

[Music]