ANSWERS THE NECESSITIES OF LIFE

The necessities of life

      I.            Vocabulary

1.      producer an organism that can make its own food

2.      consumer an organism that eats other organisms or organic matter

3.      ATP adenosine trisphosphate

4.      Nucleic acids  a molecule made up of subunits called nucleotides

5.      decomposer an organism that gets there food by breaking down food

6.      proteins a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body

7.      carbohydrates a class of energy giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen

8.      lipid a type of biochemical that does not dissolve in water

9.      phospholipids a lipid that contains phosphorus and that is a structural component in cell membranes

10.  air is a mixture of several different gases

11.  photosynthesis the process in which plants make food

12.  molecule is a substance when 2 atoms combine

13.  enzyme kind of protein that starts or speeds the chemical reactions in cells

14.  Starch is a carbohydrate

15.  Fat is a lipid

   II.            Answer the questions

1.      Plants store extra sugar as

a)      Proteins

b)      Starch

c)      Nucleic acids

d)      Phospholipids

2.      Organisms store energy in

a)      Nucleic acids

b)      Lipids

c)      Phospholipids

d)      Water

3.      The subunits of  nucleic acids are

a)      Nucleotides

b)      Oils

c)      Sugars

d)      Amino acids

4.      The subunits of proteins are

a)      Nucleotides

b)      Oils

c)      Sugar

d)      Amino acids

5.      The % of water is in the body?

a)      25%

b)      90%

c)      70%

d)      95%

6.      How many amino acids form proteins?

e)      20,000

f)       15,000

g)      17,000

h)      10,000

7.      Why living things must have air?

To live, to make photosynthesis, to breath, etc

8.      Based on what you know about carbohydrates, lipids, and proteins, why is important for you to eat a balanced diet?

To not consume complex carbohydrates

9.      Why is water important for an organism?

Because water helps carry living process

10.  What does food give organisms?

Energy and raw materials to carry life process

11.  Why do some organisms compete in earth?

To have a good place to live, have air, food and water

12.  Which 6 elements form living things?

Carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur

III.            Complete the charts

Simple carbohydrates	Complex carbohydrates
Made up of one sugar molecule	Made up of many sugar molecules
Are types of carbohydrates

Oils	Fats
·         Lipids are stored in plants ·         At room temperature are liquids	·         Lipids are stored in animals ·         At room temperature are solids
Are types of lipids

Phospholipids	Lipids
·         Contain phosphorus ·         Can mix with water	·         Cannot mix with water ·         Store energy
Form part of the cell membrane of cells

IV.            Critical thinking

1.      Which resource do you think is most important to your survival: water, air, a place to live, or food? Explain your answer

VARIES

2.      Could life as we know it exist on earth if air contained only oxygen? Explain

No, because without carbon dioxide for photosynthesis plants cannot give us oxygen