THE NECESSITIES OF LIFE

 The necessities of life

      I.            Vocabulary

1.      ____________ an organism that can make its own food

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

3.      ____________ adenosine trisphosphate

4.      ____________  a molecule made up of subunits called nucleotides

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

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

8.      ____________a type of biochemical that does not dissolve in water

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

10.  ____________is a mixture of several different gases

11.  ____________the process in which plants make food

12.  ____________is a substance when 2 atoms combine

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

16.  Starch is a __________

17.  Fat is a__________

   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?

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

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9.      Why is water important for an organism?

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10.  What does food give organisms?

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11.  Why do some organisms compete in earth?

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12.  Which 6 elements form living things?

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III.            Complete the charts

Simple carbohydrates	Complex carbohydrates

Oils	Fats

Phospholipids	Lipids

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

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

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