1. What do all these molecules have in common?
What kind of compounds are shown in the pictures?

2. What is the # of atoms of the following elements: carbon, hydrogen, and oxygen?
What is the C:H:O ratio?
What do this molecules are made of?
How do you say that in Greek?
What is another word to say “Carbohydrate”?
What is about the shape?

3. Do Now:
What kind of molecules are these?
What is the C:H:O ratio?
What does the word “carbohydrate” mean?

4. Carbohydrates
Carbohydrates are compounds made up of carbon, hydrogen, and oxygen atoms, usually in a ratio of 1:2:1
They dissolve in water and their color is white.
Living things use carbohydrates as their main source of energy. The breakdown of sugar, such as glucose, supplies immediate energy for all cell activities.
Plants and some animals also use carbohydrates for structural purposes.
For example, cellulose gives the plant much of their strength and rigidity. Cellulose is the major component of both wood and paper, so you are actually looking at cellulose as you read these words!

5. Carbon, hydrogen, and oxygen 1:2:1
Organic
1. Carbohydrates are (organic/ inorganic) __________ molecules compounds.
2.They are made of the following elements:
3. The ratio between carbon, hydrogen and oxygen is the same as __________
4. They dissolve in _____________, usually their color is __________________
5. The jobs of carbohydrates are
Carbon, hydrogen, and oxygen
1:2:1
water
white
1. Carbohydrates are the main source of energy
2. It gives plants strength and rigidity

6. Living things store extra sugar as complex carbohydrates known as starches
Single sugar molecules are also called monosaccharides.
Simple sugar include glucose, galactose, which is a component of milk, and fructose, which is found in many fruits.
fructose
galactose

7. The large macromolecules formed from simple sugar are known as complex sugar (polysaccharides).
Many animals store excess sugar in a polysaccharide called glycogen, or animal starch.
When the level of glucose in your blood runs low, glycogen is released from your liver. The glycogen stored in your muscles supplies the energy for muscle contraction and thus, for movement.
Plants use a slightly different polysaccharide, called plant starch, to store excess sugar. Starch is present in potato, rice, and corn.
Starch

8. Simple sugar
Simple sugar
Starch
Complex sugar
Complex sugar
Complex sugar

9. Ribose, glucose, deoxyribose
1. Base on the handout with pictures of carbohydrates, arrange the pictures into simple sugar (monosaccharides) and complex sugar (polysaccharides).
Simple sugar (monosaccharides):
Complex sugar (polysaccharides):
Ribose, glucose, deoxyribose
Cellulose, glycogen, starch
fruit, potato, rice, corn, pasta, bread
2. We eat carbohydrates in food, like
3. Glucose is important because
4. Starch is present in
Its function is
5. Glycogen is present in
6. Cellulose is present in
It supplies energy for all cell activities
Plants (potato, rice, corn)
To store excess sugar in plants
Animal muscles and liver
To store excess sugar in animal and supply energy to muscles
Plants (wood and cell walls), paper
To provide strength and rigidity in plants

10. Carbohydrates Source of energy Simples Sugar Complex Sugar Glucose
2 kinds of carboohydrates
Function
Source of energy
Simples Sugar
Complex Sugar
In animals
In plants
Three examples
Glucose
Ribose
Fructose
Function
Glycogen
Starch
Structural purposes
Giving strength
and rigidity
Cellulose
Found in
Found in
Found in
Found in
Muscle
Liver
Paper
Cell wall
Milk
Fruit
Potato Rice
Function
Function
Function
Store excess sugar in plants
Stores
excess
sugar in animals
Gives
strength
rigidity

11. CHARACTERISTICS or TRAITS
CARBOHYDRATES
CHARACTERISTICS or TRAITS
FUNCTION
GLUCOSE
Drawing
Where do you find it?
Function
STARCH
CELLULOSE
GLYCOGEN

12. Content
Poster includes at least 4 carbohydrates traits
Poster describes 2 functions of carbohydrates
Poster includes information about the main carbohydrates
Function
Where these carbohydrates can be found
Pictures
Poster Presentation
Poster is well organize
The information is clearly posted
Poster is neat
Collaboration with peers
Each student is actively involved
All group members participated equally
Presentation to class
Each student participate in the presentation
Group presentation is clear and the information is accurate

13. Which elements are carbohydrates made of?
What are the two functions (jobs) of carbohydrates?
Give two examples of carbohydrates.
Carbon
Hydrogen
Oxygen
They are the main source of energy
Plants and animals use carbohydrates for structural purposes
Glucose, starch, glycogen, cellulose

14. carbohydrates
Iodine

15. Glucose
Cellulose

16. Monosaccharide
Simple sugar
Polysaccharide
Complex sugar

17. Glycogen
Starch

18. Rigidity Strength The quality of being strong
The quality of being inflexible, stiff, firm, or rigid