The Cretaceous-Tertiary event is the largest mass extinction in the Earth\'s his

Question

The Cretaceous-Tertiary event is the largest mass extinction in the Earth's history. Soft parts are easily preserved as fossils within sediments. Fossils are usually found in igneous rocks. Fossilization is a rare occurrence. Arthur Holmes proposed continental drift. The meteor responsible for the K/T extinction was approximately 6km in diameter. The longest era in geologic time is the Cenozoic. The first time period on the geologic time scale is the Hadean. Approximately 35% of species become extinct at the Permian-Triassic mass extinction. Isotopes of an element have varying of neutrons.

Explanation / Answer

1.false: permian triassic is the largest mass extinction

2.false: hard parts are preserved

3.false: fossils are usually found in sedimentary rocks

4.true: it is a rare occurence, since dead remains are eaten up microorganisms easily

5.false: alfred weigner proposed continental drift

6.false: 4.1 to 4.4km diameter

7.false:palaezoic is the longest era

8.true : hadean is the first time period

9.false: 95 % marine and 70 % terrestial species were extinct

10.true : isotopes of an element have varying numbers of neutrons

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.