In the rock cycle, heat and pressure are metamorphic forces applied to existing rocks to transform them into metamorphic rocks.

Answer: This kind of change, which results from both rising temperature and pressure, is called metamorphism, and the resulting rock is a metamorphic rock.

The heat and pressure comes from inside the earth. From the upper mantle up to within a few kilometers of the surface of the earth there is a tremendous amount of heat and pressure. This heat and pressure increase with depth. It is estimated that the temperature increases about 20o to 30o C per kilometer of depth.

Meteor showers are not dangerous, most meteors burn up in the atmosphere meaning it’s almost impossible for them hurt you. It’s incredibly unlikely for a meteor to hit the earth and even if one did, the chance that it would hit you or your property is even lower.

While most meteorites have a smooth surface with no holes, some meteorites exhibit thin flow lines or thumbprint-like features called regmaglypts. Flow lines are cooled streaks of once-molten fusion crust.

In the Solar System Most meteoroids come from the asteroid belt, having been perturbed by the gravitational influences of planets, but others are particles from comets, giving rise to meteor showers. Some meteoroids are fragments from bodies such as Mars or our moon, that have been thrown into space by an impact.

When a meteor appears, it seems to “shoot” quickly across the sky, and its small size and intense brightness might make you think it is a star. If you’re lucky enough to spot a meteorite (a meteor that makes it all the way to the ground), and see where it hits, it’s easy to think you just saw a star “fall.”

The showers tend to be most visible after midnight and before dawn. It is best to use your naked eye to spot a meteor shower. Binoculars or telescopes tend to limit your field of view. You might need to spend about half an hour in the dark to let your eyes get used to the reduced light.

The peak of the Lyrid meteor shower will be overnight on April 21-22, NASA meteor expert Bill Cooke told Space.com. As with most meteor showers, the peak viewing time will be before dawn, but the Lyrids will become visible beginning at about 10:30 p.m. local time.

The Eta Aquarids peak before dawn on May 5. Update for May 4: The Eta Aquarid meteor shower peaks overnight tonight, with the best views before dawn tomorrow (May 5).

To best see the Perseids, go to the darkest possible location and lean back to observe as much sky as possible directly above you. The best time to look for meteors is in the pre-dawn hours. While the meteors will peak in the morning on Aug. 12, they will also be very visible on Aug.