It is summer and if you're lucky that might mean going away on holiday to a different country.
But have you ever wondered why it can be so much warmer - or colder - abroad?
Well that's what nine-year-old Bella in Stevenage wants to know.
She asked: How are different countries hot and some are cold even though we are on the same planet?
That's a sizzler of a question so we've put it to an expert to explain.
If you've got your own Big Question you would like us to answer get in touch!