Question

why most material became less dense as thire temperature is increased​

Answer 1

$\huge\tt\orange{Answer}$

❥ᴡʜᴇɴ ᴀ ʟɪQᴜɪᴅ ᴏʀ ɢᴀꜱ ɪꜱ ʜᴇᴀᴛᴇᴅ, ᴛʜᴇ ᴍᴏʟᴇᴄᴜʟᴇꜱ ᴍᴏᴠᴇ ꜰᴀꜱᴛᴇʀ, ʙᴜᴍᴘ ɪɴᴛᴏ ᴇᴀᴄʜ ᴏᴛʜᴇʀ, ᴀɴᴅ ꜱᴘʀᴇᴀᴅ ᴀᴘᴀʀᴛ. ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇ ᴍᴏʟᴇᴄᴜʟᴇꜱ ᴀʀᴇ ꜱᴘʀᴇᴀᴅ ᴀᴘᴀʀᴛ, ᴛʜᴇʏ ᴛᴀᴋᴇ ᴜᴘ ᴍᴏʀᴇ ꜱᴘᴀᴄᴇ. ᴛʜᴇʏ ᴀʀᴇ ʟᴇꜱꜱ ᴅᴇɴꜱᴇ.