Science Common Sense

1164 - What conditions are needed for these changes to occur?

It seems you didn't specify the changes you are referring to. If you could provide more context, I'll be happy to give you a concise answer suitable for a 12-year-old.

(If you're referring to physical or chemical changes, I can give some general conditions. For example:

• Melting: the temperature needs to be above the melting point of the substance.
• Boiling: the temperature needs to be above the boiling point of the substance.
• Rusting: oxygen and water are needed for rust to form on iron or steel.
• Photosynthesis: sunlight, water, and carbon dioxide are needed for plants to make food.)

Please provide more information, so I can give a specific answer.