die Erde
Earth
The planet on which humans live; the third planet in the solar system.
Die Erde braucht etwa 365 Tage, um die Sonne einmal zu umrunden.
The Earth takes about 365 days to orbit the Sun once.

Earth / soil
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Earth
The planet on which humans live; the third planet in the solar system.
Die Erde braucht etwa 365 Tage, um die Sonne einmal zu umrunden.
The Earth takes about 365 days to orbit the Sun once.

The use of the article helps distinguish the meanings. 'Die Erde' with the definite article almost always means the planet. When speaking of the material 'Erde' (soil), for example for plants, no article is often used.
Die Erde ist der einzige Planet mit flüssigem Wasser.
The Earth is the only planet with liquid water.
Other words are derived from 'die Erde' (Earth/soil). The verb 'erden' means to connect an electrical device to ground. The adjective 'irdisch' means 'worldly' or 'belonging to the Earth.'
Aus Sicherheitsgründen muss man Elektrogeräte immer erden.
For safety reasons, electrical devices must always be grounded.
You can recognize the meaning 'Boden/Erdreich' (ground/soil) from the context. If the topic is gardening, plants, pots, or construction work, this material meaning is intended. It is also often used in compounds such as 'Blumenerde' (potting soil) or 'Muttererde' (topsoil).
Die Karotten wachsen am besten in lockerer Erde.
Carrots grow best in loose soil.
The technical meaning 'elektrische Erdung' (electrical grounding) is very specific. You can recognize it in the context of electricity, cables, sockets, and safety instructions. The related verb is 'erden' (to ground).
Prüfen Sie, ob das Kabel an der Erde angeschlossen ist.
Check whether the cable is connected to ground.
The expression 'auf Erden' (on Earth) is poetic, religious, or very formal. It is used to describe life on our planet in contrast to heaven or life after death. In normal everyday language, people usually say 'auf der Welt' (in the world).
Viele Menschen wünschen sich Frieden auf Erden.
Many people wish for peace on Earth.
world
'die Welt' and 'die Erde' can both mean the planet we live on. 'Erde' is more precise when talking about the planet as a celestial body, for example in geography or astronomy. 'Welt' can mean the planet, but it often also includes countries, people, cultures, and life on this planet. The words can be confused because they seem similar in many sentences. As a simple guide: 'Erde' is more the planet itself, while 'Welt' is more the planet with everything that happens on it.

Die Erde bewegt sich um die Sonne.
The Earth moves around the Sun.
Am Telefon erzählte er von seiner Reise um die Welt.
On the phone, he talked about his trip around the world.