That's correct! The Earth's crust is less than 1% of the Earth's total mass.

Here's a breakdown:

* Crust: Makes up about 0.5% of the Earth's mass.

* Mantle: Accounts for around 67% of the Earth's mass.

* Core: Represents approximately 32% of the Earth's mass.

So, the vast majority of the Earth's mass is found in the mantle and core, leaving the relatively thin crust a small portion by comparison.