EARTH AN INHABITED PLANET. REVIEW.

1. What are the reasons that make the Earth a good place for having life?

2. Fill in the blanks.

a. ……………………………. such as Carbon or Oxygen join together to form

……………………….

b. The ………………………………… are the ones that only can be found inside a

living thing.

c. The main …………………………….. compound is water. …………………………

compounds can be found also outside living things.

d. The main organic compounds also called ……………………………… are sugars,

……………………………, …………………………………… and ………………………………….

3. Make a drawing of the main types of cells and name their parts.

4. Explain how the cells can organize forming a multicellular organism.

5. Define nutrition, interaction and reproduction.

6. Define autotrophic nutrition and match the sentences with the drawing:

Water and minerals are absorbed here.

Carbon dioxide is absorbed

here.

Organic matter is made by

transforming inorganic

substances into organic substances here.

Water and minerals are

transported to the leaves following this way.

7. Define and explain heterotrophic nutrition.

8. Define and explain the two main types of reproduction.

9. Organize the next words in the correct order. Explain your answer.

Nervous system stimuli movement Sensory organs

10. What are the characteristics that all the living things share?

11. What is the origin of biodiversity? Explain your answer.

12. What information are the fossils giving to us?