What is the connection between climate, gases and the sea? For this you must know that in water you can dissolve not only salt for making pasta, but also gases. These gases are found in the air we breathe and can affect and be affected by our climate. But what does a bottle have to do with all this? What effect does the temperature of the water have on its ability to absorb gases and is there such a thing as too much (as in salt water)?
Here we go - have fun!
Why are our oceans so important? What exactly are greenhouse gases? And more importantly, what are they doing to Earth?
Below you will find additional information and links to information material that we have found online on the topic!
Suitable for age group: 10 years and older
Especially interesting for: Children and teenagers, amateur chemists and geologists
Preparation time: approx. 1h, including latency
Bowl (medium sized)
Plastic bottle (0.5 l)
Tap water (warm and cold)
Fizzy tablets (e.g. vitamin C, magnesium…)
Felt pen/ Marker
Step 1: Dye warm tap water and fill up vessels
First, dye the warm tapwater with food colouring (so that it looks nicer), fill the bowl about halfway and the bottle completely. Then put the funnel into the bottle and carefully put everything into the bowl with the opening facing down.
Make sure the funnel is not too small. Ohterwise the bottle will end up falling over.
Step 2: Put the fizyy tablet under the funnel
The fizzy tablet starts to bubble and carbon dioxide bubbles rise into the bottle. When the entire tablet has dissolved (after approx. 10-15 min), mark the edge of the gas bubble with a felt-tip pen.
Step 3: Repeat step 1 and 2 but with cold water
Compare the markings, what do you notice?
If you have done everything correctly, the mark should be further up than with the warm water before. This is because the ability of the water to absorb gases depends on the temperature.
The gas bubble has become larger with the 2nd tablet than with the 1st, this is due to the so-called saturation effect. You have probably already observed this with salt, at some point it no longer dissolves in the water.
Good luck with your little
The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat. This process makes Earth much warmer than it would be without an atmosphere. The greenhouse effect is one of the things that makes Earth a comfortable place to live.
© NASA climate kids
The greenhouse effect is a warming of Earth’s surface and the air above it. It is caused by gases in the air that trap energy from the Sun. These heat-trapping gases are called greenhouse gases.
© 2021 Encyclopædia Britannica, Inc.
Our climate is changing. Observed changes over the 20th century include increases in global average air and ocean temperature, rising global sea levels, long-term sustained widespread reduction of snow and ice cover, and changes in atmospheric and ocean circulation and regional weather patterns, which influence seasonal rainfall conditions.
© Department of Agriculture, Water and the Environment
Created by Sandra Kollmansperger