If Space targets a trap card which is face down on the field can it be activated?

No, Space cannot be activated if it targets a face-down trap card.

Here's why:

* Space is a Continuous Spell card.

* Continuous Spells can only target face-up cards on the field.

* Trap Cards are typically face-down, and can only be activated in response to a specific event.

Therefore, Space cannot target a face-down trap card.

It's important to note that some trap cards can be activated face-down, but they would be considered face-up once activated, making them eligible targets for Space.