Multiple choice

This type of igneous rock forms when lava on Earth's SURFACE cools and hardens:

  1. internal igneous rock

  2. external igneous rock

  3. intrusive igneous rock

  4. extrusive igneous rock

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Extrusive igneous rocks form from lava that cools quickly on the Earth's surface.