Issuu on Google+

I.E.S. Consaburum

Science

UNIT 5 The Biosphere ACTIVITIES

1ยบ E.S.O.


1. Define a. Biosphere: It is the layer of the Earth formed by living beings. b. Single-celled organisms: they are the organisms made up of one single cell. c. Cell: cell is the smallest unit of life which is able to carry out (to perform) three vital functions. d. Chloroplast: it is the cell´s organelle where photosynthesis takes place. e. Tissue: it is a level of cellular organization that it is made up of the same kind of cell. f. Nucleus: it is the cellular structure that carries the genetic information of living beings.


2. Find the suitable word: Membrane is the layer that surrounds and protects the cells. Besides, it a. .......................... allows the interchange of substances with the surrounding. Cytoplasm is a jelly-like liquid that fills the cell’s interior and contains the b. ......................... organelles DNA c. ......................... controls all the cellular functions and contains all the information of each living beings Organelles d. ......................... are structures that carry out many cellular functions.

Nucleus e. .......................... is the structure that protect the genetic material and is found in .......................... Eukaryotic cells.


3. Which characteristics make the Earth an habitable planet? a. Our planet receives enough light and heat from the sun to maintain suitable temperatures for living beings b. The atmosphere protects our planet from harmful solar radiations and it contains the essential gases for respiration or breathing c. Our planet has enough water in liquid state.

4. Copy and complete the sentences in your notebook using the correct form of a verb from the box. maintain a. Our planet has enough light and heat to ......................a suitable temperature. protects b. The atmosphere .......................... the planet from harmful solar radiation. helps c. The atmosphere ................. to maintain suitable temperature for life d. Living beings ......................... three vital functions carry out e. The combination of bioelements ...............................biomolecules to make living produces beings


5. What is a bioelement? What are the main biolements found in living beings? a. The bioelements are the elements that compose the living beings, they are the elements necessary for life. b. The main bioelements are: • Carbon C • Hydrogen H • Oxygen O • Nitrogen N • Phosphorus P • Sulphur S

6. Biomolecules: How are biomolecules made up of? They are made up of bioelemets

How can we classify biomolecules? We can classify biomolecules into two groups: inorganic and organic biomolecules.

Where can we find biomolecules? We can find inorganic biomolecules in the living being and in the planet. We can find organic biomolecules just in the living being


7. Copy and complete this table BIOMOLECULES

PROTEINS NUCLEIC ACIDS

GLUCIDS FATS OR LIPIDS WATER MINERAL SUBSTANCES

FUNCTION Form structures such as muscle, hair Are responsible for our genetic characteristics Provides energy for the organism Are energy reserves Is the most abundant compound of living beings Carry out essential functions such as beating of your heart, muscle contraction...

8. Write the word in order to make questions. Then ask your partner the question. a. Which type of biomolecules give us energy? The biomolecules which give us energy are Glucids or Carbohydrates b. What do fats provide? Fats provide energetic reserves c. What do we need to form hair and muscle? We need proteins to form hair and muscle d. What do nucleic acids contain? The nucleic acids contain all the information about LB e. What is the most abundant compound in living beings? The most abundant compound in LB is the water


9. Why we can say the cell is the smallest unit of life? Because the cell is the smallest structure which can carry out the three vital functions: nutrition, interaction and reproduction

10. What is the main difference between eukaryotic and prokaryotic cells? The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells have the DNA protected inside nucleus, however prokaryotic cells have the DNA dispersed in the cytoplasm.

11. Choose the correct answer: a. b. c. d.

Prokaryotic cells have / don’t have a nucleus. Prokaryotic cells are more / less primitive. Eukaryotic cells have / don’t have a membrane around the nucleus. Eukaryotic cells can /can’t be plant or animal cells


12. Listen and say what part of a cell the speakers are talking about a. Nucleus / membrane b. Organelles / cytoplasm c. Cytoplasm / nucleus

13. Match the terms in the two columns. Which of the structures is only found in plant cells? A

Cytoplasm

B

B

Nucleus

D Thin layer that surrounds and protect the cell

C

Chloroplast

A Jelly-like liquid inside the cell

D

Membrane

C

Organelle that contains genetic material

The organelle where photosynthesis takes place.


14. Complete this table with yes or no Cellular structure

Prokaryotic cells

Cytoplasm

  

Genetic material

Cell wall Membrane

Nucleus Chloroplasts Mitochondria Vacuoles

Eukaryotic cells in plants

Eukaryotic cells in animals

       

     


Listening •

carry out being A living .......................... is an organism that is able to ........................................ three vital ............................: function nutrition, .............................. interaction and reproduction. All living beings are ................... made

up of similar substances and they are formed by ................................. bioelements

three 1.1 They perform the ......................... vital functions: •

exchange

Nutrition: this is a series of processes by which living things ................................... matter and

environment allows them to .......................... build ............................. with the ........................................... This ........................ energy their own structures and ................................ their vital functions. There are two kind of nutrition: perform autotrophic and ......................................... heterotrophic

Autotrophs produce their .................... own water CO2 and mineral .................................. food by taking ..................., substances .................................. from the environment.

eating Heterotrophs obtain their own food by ............................. ................................ other organisms or their ........................ remains


1º ESO UNIT 5 BIOSPHERE. ACTIVITIES