A Complete the sentences with the correct word. • fertility • expansion radicals contraction process elements properties • constellation • evolution • collapse 1 According to the Cyclical Universe Theory, the ... of our universe will occur trillions of years from now, when it stops expanding. 2 The documentary showed the . of life on Earth over the last three million years. 3 When I looked up to the sky at night, I could see a(n) ...... ... of stars that had the shape of a bear. 4 The periodic table has over a hundred chemical 5 The enzyme telomerase helped improve the of mice. 6 Some scientists believe one of the things which caused the Big Bang was the .... of a prior universe. 7 Free.. ... are molecules which harm our cells over time. 8 When scientists talk about the of the universe, they are referring to when it gets bigger. 9 Many scientists are trying to slow down the ageing ........ 10 The teacher asked her students to write down the ... ... of the materials in their notebooks.
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1 According to the Cyclical Universe Theory, the **collapse** of our universe will occur trillions of years from now, when it stops expanding.
2 The documentary showed the **evolution** of life on Earth over the last three million years.
3 When I looked up to the sky at night, I could see a(n) **constellation** of stars that had the shape of a bear.
4 The periodic table has over a hundred chemical **elements**.
5 The enzyme telomerase helped improve the **fertility** of mice.
6 Some scientists believe one of the things which caused the Big Bang was the **collapse** of a prior universe.
7 **Radicals** are molecules which harm our cells over time.
8 When scientists talk about the **expansion** of the universe, they are referring to when it gets bigger.
9 Many scientists are trying to slow down the ageing **process**.
10 The teacher asked her students to write down the **properties** of the materials in their notebooks.