Earth's inner core is very deep. It is made of iron. A team in Japan found something new. They studied iron with hydrogen. This is called iron hydride. They put it under very high heat. They put it under very high pressure. These conditions are like the center of Earth.
The team used special tools. The tools are diamond-anvil cells. They heated the iron with lasers. They watched what happened. The iron hydride changed. It became a superionic state. This is a very strange form of matter. Atoms moved fast inside it. The team saw signs of this change.
These findings help us understand Earth. We know more about the deep inside now. The core may have this strange form. This is very important for science. Scientists want to learn more about it. They will keep studying this new form of matter.
Sources: phys.org
The words in bold are from the article.
| 1. deep | a. unusual |
| 2. core | b. quickly |
| 3. pressure | c. center |
| 4. changed | d. far down |
| 5. strange | e. crushing force |
| 6. atoms | f. looking at |
| 7. fast | g. know about |
| 8. inside | h. in the middle |
| 9. understand | i. became different |
| 10. studying | j. tiny parts |
1.d 2.c 3.e 4.i 5.a 6.j 7.b 8.h 9.g 10.f