The Necessities Of Life

Front 1

What are the four basic needs of every organism?

Back 1

1. Water
2. Air
3. A place to live
4. Food

Front 2

Cells of most living things are made of approximately ______ water.

Back 2

70%

Front 3

Most of the chemical reactions involved in metabolism require ____________.

Back 3

water

Front 4

How long can humans survive without water?

Back 4

3 days

Front 5

Air is a mixture of gases, including oxygen and ________.

Back 5

Carbon dioxide.

Front 6

What is a chemical process in which most living things use oxygen?

Back 6

Releasing energy from food

Front 7

In addtion to carbon dioxide gas, green plants, algae, and some bacteria also need this.

Back 7

Oxygen

Front 8

Green organisms convert the energy in sunlight to energy stored in food during this process?

Back 8

Photosynthesis

Front 9

What two mixture of gases make up air?

Back 9

Oxygen and Carbon dioxide

Front 10

What is photosynthesis?

Back 10

Photosynthesis is the process in which green organisms convert the energy from the sun to energy stored in food.

Front 11

How does the limited amount of space on Earth affect organisms?

Back 11

Organisms often compete with each other for food, water and other necessities.

Front 12

What are two things food gives organisms?

Back 12

Food gives organisms energy and the raw materials needed to carry on life processes.

Front 13

What are two ways organisms use nutrients from food?

Back 13

Two ways organisms use nutrients from food are by replacing cells ad building body parts.

Front 14

How are organisms grouped?

Back 14

Organisms are grouped by how they get their food.

Front 15

Name the three groups of organisms.

Back 15

Producers, consumers, and decomposers

Front 16

What is a consumer?

Back 16

A consumer is an organism that eats other living organisms or organic matter.

Front 17

What is a producer?

Back 17

A producer uses energy from the sun or the chemicals in the environment to make food.

Front 18

What is a decomposer?

Back 18

A decomposer gets energy by breaking down nutrients in dead organisms or animal wastes.

Front 19

What do all organisms do to food in order to use the nutrients in it?

Back 19

Break food down

Front 20

Nutrients are made up of ________, as substance created when two or more atoms combine.

Back 20

molecule

Front 21

Sugars, starches, and fiber are examples of energy-giving nutrients called _____________.

Back 21

Carbohydrates

Front 22

Molecules made of different kinds of atoms are called ____________.

Back 22

compounds

Front 23

What is a molecule?

Back 23

A molecule is a substance created when two or more atoms combine.

Front 24

_____________ are proteins found in red blood cells that attach to oxygen.

Back 24

Hemoglobin

Front 25

Chemical elements within molecules combine to form this?

Back 25

Building blocks of cells

Front 26

Name the five chemical building blocks of cells.

Back 26

1. Proteins
2. Carbohydrates
3. Lipids
4. ATP
5. Nucleic acids

Front 27

What are enzymes?

Back 27

Enzymes are proteins that speed up chemical reactions

Front 28

Carbohydrates made of ONE sugar molecule or a FEW linked sugar molecules are called _____________.

Back 28

Simple carbohydrates

Front 29

What are proteins?

Back 29

Proteins are nutrients involved in almost all life processes.

Front 30

What are amino acids?

Back 30

Amino acids are compounds that make up proteins.

Front 31

What are hemoglobin?

Back 31

Hemoglobin is a protein found in red blood cells that attaches to oxygen.

Front 32

What are carbohydrates?

Back 32

Carbohydrates are energy-giving nutrients.

Front 33

How do cells use carbohydrates?

Back 33

Cells use carbohydrates as a source of energy and for energy storage.

Front 34

The molecules that form much of cell membrane are called _________.

Back 34

Phospholids

Front 35

_____________ are proteins that speed up chemical reactions.

Back 35

Enzymes

Front 36

___________ are compounds that make up proteins.

Back 36

Amino acids

Front 37

___________ are nutrients involved in almost all life processes.

Back 37

Proteins

Front 38

A carbohydrate made of HUNDREDS of molecules linked together are called ___________.

Back 38

Complex carbohydrates

Front 39

What are simple carbohydrates?

Back 39

Simple carbohydrates are carbohydrates made of ONE sugar molecule or a FEW linked sugar molecules.

Front 40

Name three things lipids do.

Back 40

1. Lipids store energy
2. Lipids include fats and oils
3. Lipids make up cell membranes

Front 41

What are phospholids?

Back 41

Phospholids are molecules that form much of the cell membrane.

Front 42

What is ATP?

Back 42

ATP is the major energy-carrying molecule in the cell.

Front 43

Where can an organism get energy once it has used up most of its carbohydrates?

Back 43

They can get it from food

Front 44

What is the difference between fats and oils?

Back 44

Most fats are solids and most oils are liquids.

Front 45

What are complex carbohydrates?

Back 45

Complex carbohydrates are carbohydrates made of HUNDREDS of molecules linked together.

Front 46

Lipids _____________ mix with water.

Back 46

do not

Front 47

What are lipids?

Back 47

Lipids are energy-rich compounds made of carbon, oxygen, and hydrogen.

Front 48

The major energy-carrying molecule in the cell is _________.

Back 48

ATP

Front 49

How do cells get energy from carbohydrates and lipids?

Back 49

Cells get energy from carbohydrates and lipids by transferring the energy to the ATP molecule. The ATP molecule then provides fuel for cellular activities.

Front 50

Molecules consisting of subunits called nucleotides are called _______________.

Back 50

Nucleic acids

Front 51

Why are nucleic acids called the blueprints of life?

Back 51

Nucleic acids are called the blueprints of life because they have all the information needed for a cell to make proteins.