11/7 & 11/8 - 7th Grade Agenda

Learning Objective: Learn about diffusion and osmosisLast Day to turn in late workCollect HW: Reading Guide Chap 3 Section 3Class work: Reading Guide Chap 3 Section 4Collect Cell ModelNew JobsVideo: Bill Nye CellsClass Reading p.104 – 119HW: Reading & Note Taking p. 65 - 68Reminder Chap 3 Test on 11/9 & 11/10

Reflection

• Name 2 important organic compound in our body and also describe what it does.?

Last day to turn in late work for this Quarter

What are cells and organelles made out of?

• Chemicals

What are chemicals made out of?

• Comp_________• Can you give me

examples of compounds?

• Water, Sugar, Alcohol, Carbon Dioxide

ounds

Compound

• When two or more elements comb_____ chemically, they form a compound

ine

Elements

• Element is any substance that cannot be br_______ down into simpler substance.

oken

Compound

• Carbohydrates, lipids, proteins and nucleic acids are important groups of organic com_____________ in living things

pounds

Organic Compounds vs Inorganic Compounds

• What is the difference between organic and inorganic compounds?

• Organic compounds have the element carbon (and Hydrogen)

Carbohydrates

• A carbohydrate is an en______ rich organic compound made up of car______, sugar and oxygen.

• Carbohydrates are used to fuel our body

• Sug____ and starches are examples of carbohydrates.

ergy

ars

bon

Lipids = Fat

• Lipids are ene______ rich organic compounds made of car______, hydrogen and oxygen

• Lipids are used by our ner____ cells

• Fats, oils and waxes are all lipids

rgy

bon

ve

Proteins• Proteins are large organic

molecules made of car_____, hydrogen, oxygen, nitrogen.

• Proteins are used to build mus_____, skin and bone cells

• Food that are high in protein include me___, eggs, fi_____, nuts and beans

atsh

bon

cle

Enzymes

• An enzyme is a type of protein that speeds up a che______ reaction in a living thing.

• For example, enzymes in your saliva speed up the dige______ of food.

mical

stion

Nucleic Acids

• Nucleic acids contain the inst________ that cells need to carry out all the functions of life.

• DNA and RNA are Nucleic Acids

ructions

What are the organic compounds found in cells?

• Carboh______

• Lip_____

• Pro_____

• Nuc______ Acid

ydrates

ids

tein

leic

Diffusion

• Diffusion is the main method by which small molecules m___ across the cell mem______.

ove

brane

What causes diffusion?

• Collisions of molecules

Osmosis

• Osmosis is the diffusion of wa_____ molecules through a selectively permeable mem_____

ter

brane

Passive Transport

• The mov________ of dissolved materials through a cell membrane with___ using cellular energy

• Diffusion and osmosis are examples of Passive Transport

ement

out

Active Transport

• The movement of materials through a cell membrane using cellular ene____rgy

What is the difference between Passive Transport and Active Transport

Active TransportPassive Transport

Don’t use energy Use energy

Microscopes

• Magnification: How la______ an image can appear.

• Resolution: How sh______ an image can appear

rge

arp

Which image has higher resolution?

A B

Which image has higher magnification?

A B

What is the total magnification of the microscope?

10X

20X

10 X 20 = 200

What is the total magnification of the microscope?

10X

15X

10 X 15 = 150