ENGLISHEXAM24 EMAIL [email protected]

ENGLISHEXAM24 SKYPE englishexam24.ru

  • Exam: TOEFL
  • Course: LISTENING
  • Part 5, Exam 2

Instructions

You will hear a LECTURE about the formation of the earth.

For questions 1-6, choose the best answer (A, B, C or D).

Drag and drop the correct answer in the answer box, or type the corresponding letter.

A mark of 75% corresponds to B2 and a mark of 90% corresponds to C1.

  • 1 What is the main topic of the lecture?

  • Answer:
  • · Possible answers: A How the solar system formed.
      B Competing theories about the formation of rocks.
    C The stratification of the Earth's interior.
    D How gravity helped heat the Earth.
  • 2 Why does the professor say this:
  • "As with many theories in science, it's pretty much open to revision."

  • Answer:
  • · Possible answers: A She rejects most of the traditional views of planetary formation.
      B She hopes the students will review the traditional theory.
    C She thinks new theories offer a better explanation of planetary formation.
    D She believes that scientific theories are open to challenge.
  • 3 What does the professor imply about the formation of the Earth?

  • Answer:
  • · Possible answers: A It is familiar to some of the students.
      B A lot of background reading is necessary.
    C The theory has explanatory gaps.
    D A later course will deal with it in detail.
  • 4 According to the professor, how was rock distributed before differentiation?

  • Answer:
  • · Possible answers: A In various layers.
      B Randomly.
    C With the heaviest near the surface.
    D Heavy material was stratified.
  • 5 According to the professor, which is probably the main reason for the heating of the Earth?

  • Answer:
  • · Possible answers: A Pressure due to the force of gravity.
      B Solar radiation.
    C The impact of objects from space.
    D Radioactive decay.
  • 6 What two points are true according to the lecture?

  • Answer:
  • Answer:
  • · Possible answers: A The core of the planet has the densest material.
      B Differentiation occurred when the planetary sphere formed.
    C The atmosphere was formed during the process of differentiation.
    D The heating of the Earth produced a random distribution of material.

« Back to the list of exercises