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III. Make question-tags

  1. Evidence to support the theory of evolution has come primarily from the fossil record, __________?

  2. Cuckoos don’t build nests, ________?

  3. Evolution itself is a biological phenomenon common to all living things _________?

  4. Before the invention of a microscope, people didn’t know anything about cells ________?

  5. In agriculture, both asexual and sexual reproduction are important _________?

  6. You weren’t listening to the lecture _________?

  7. I’m going to become a scientist _________?

  8. Keep on working on your project _________?

  9. There are a lot of students in the lecture hall __________?

  10. This isn’t very interesting __________?

LISTENING COMPREHENSION

I. You are going to hear two fragments of a lecture about the history of our planet and life on it. Listen to the first fragment and answer the following questions. Before listening discuss the meaning of the words in the box below with your classmates or teacher

big bang

background radiation

permeate

be tuned to

expand

collapse

gravitational attraction

solid matter

aggregation

dust particles

cluster

compress

melt

radioactive decay

core

crust

mantle

dense

silicate materials

sea bed

mountain range

plain

erode

hydrogen

carbon dioxide

nitrogen

water vapour

dissolve

lightning

  1. When did the “big bang” occur?

  2. Has the universe stopped expanding?

  3. How can we “feel” the effects of the original explosion?

  4. How do we call our galaxy?

  5. When did our solar system shape up?

  6. How were most of the planets built?

  7. What is the composition of earth’s core and mantle?

  8. How thick is earth’s crust?

  9. Is the atmosphere we have now the same one that used to surround the earth about 5 billion years ago?

II. Listen to the second fragment and complete the following sentences. Study the following words before listening

to bear traces of mud ice age

to teem with life ozone layer glacier

ultraviolet radiation damaging wavelength high latitude

be confined to shallow coastal waters

  1. The oldest rocks we can find on earth (over 3.5 billion years old) ______________________.

  2. Life was confined to depths below 5 meters (m) in the ocean, ________________________________by the absorbing shield of water, or _____________________.

  3. _________________, the atmosphere gradually changed.

  4. The ozone blocked some of the most damaging _____________________.

  5. Life evolved and the land was colonized long before ____________________________ positions.

  6. Throughout the history of the planet, there have been _____________________________.

  7. During warmer epochs, _____________________, and mild climates prevailed even at high latitudes.

  8. It was during this period that Homo sapiens – ____________ – evolved.

WRITING AND SPEAKING

Write a short essay about biology using the vocabulary of Lesson 1. Get ready to present it in class

Lesson 2

LIFE

PRE-READING TASKS