The impact of the meteorite caused a huge crater in the ground.
A compound subject for impact would have to be two words that are subjects in the beginning of the sentence and the word impact would have to be in the sentence somewhere.
Our regional measures have had a significant impact on unemployment.
Brace for impact - we'regoing in!Please hand me that impact wrench.
The meteoroid collided with a devastating impact.
Greenhouse gases have had a significant impact on the environment.
The baseball collided with his face with such an impact, that it broke his nose.
Impact crater is now more prevalently used for the term impact basin.
The impact of the closing that factory will be huge on the local economy.
The impact of the crash caused the air bag to deploy.
The two cars created a great impact.
"You're making a big impact in my life!" screamed Tiffany.
"You're making a big impact in my life!" screamed Tiffany.