Four Needs of Living Things• 1. Four needs of living things.• 1. water• 2. air• 3. place to live• 4. food

• 2. Producers• Consumers• Decomposers

• Two new words: autotrophs and heterotrophs

Auto = selfTroph = feeder

Hetero = otherTroph = feeder

• 1. Producers are autotrophs because they make their own food.

• 2. Consumers are heterotrophs because they eat other organisms.

• 3. Decomposers break down the remains of organisms. Examples are fungi and bacteria.

• 3. Six elements form the compounds of life.

• 1. carbon• 2. hydrogen• 3. nitrogen• 4. oxygen• 5. phosphorus• 6. sulfur

• Isotopes• One of two or more atoms that have the same

atomic number (the same number of protons) but a different number of neutrons. Carbon 12, the most common form of carbon, has six protons and six neutrons, whereas carbon 14 has six protons and eight neutrons. Isotopes of a given element typically behave alike chemically

• 4. Compounds of life • 1. proteins• 2. carbohydrates• 3. lipids• 4. ATP• 5. Nucleic acids

5. Compounds of Life Chart

1. Proteins Build and repair body structures and regulate processes in the body. Examples: enzymes and hemoglobin

2. Carbohydrates Provide energy and store energy.Simple and complex carbohydrates

3. Lipids Store energy. Fats and oils are examples. Phospholipids form cell membranes.

4. ATP Energy carrying molecules. Supplies energy to cells.

5. Nucleic acids Blueprints of life – make proteins. Example: DNA

• 6. Carbon, hydrogen, nitrogen, Oxygen, phosphorus, andSulfur combine to form:

ProteinsCarbohydrates

Lipids ATP

NucleicAcids

• 5. Carbon, hydrogen, nitrogen, Oxygen, phosphorus, andSulfur combine to form:

ProteinsCarbohydrates

Lipids ATP

NucleicAcids

Hemoglobin

EnzymesSimple and Complex

carbs

Fats, oils

PhospholipidsForm cell

membranes

SuppliesEnergyto cells

DNA