chapter 15 air
Download
Skip this Video
Download Presentation
CHAPTER 15 AIR

Loading in 2 Seconds...

play fullscreen
1 / 24

CHAPTER 15 AIR - PowerPoint PPT Presentation


  • 71 Views
  • Uploaded on

CHAPTER 15 AIR. CLASS VI. AIR IS PRESENT EVERY WHERE AROUND US. MOVING AIR IS CALLED WIND. ACTIVITY: An empty bottle is inverted and dipped under water. Water does not enter inside bottle because the space inside the bottle is filled with air.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' CHAPTER 15 AIR' - burt


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
air is present every where around us
AIR IS PRESENT EVERY WHERE AROUND US.
  • MOVING AIR IS CALLED WIND.
slide3

ACTIVITY:

  • An empty bottle is inverted and dipped under water.
  • Water does not enter inside bottle because the space inside the bottle is filled with air.
  • On tilting, air goes out of the bottle.Now water enters the bottle.
  • AIR OCCUPIES SPACE
properties of air
PROPERTIES OF AIR
  • AIR HAS NO COLOUR. IT IS TRANSPARENT.
  • THE ENVELOPE OF AIR AROUND EARTH IS CALLED ATMOSPHERE.

ATMOSPHERE

slide5

As we go higher and higher, above the suface of earth, the thickness of air becomes less .

  • At the top of high mountains, oxygen is less.
  • Mountaineers carry oxygen cylinders with them.
slide6

AIR IS A MIXTURE OF GASES.

COMPOSITION OF AIR -

* NITROGEN -78%

* OXYGEN -21%

* CARBONDIOXIDE - 0.04%

* WATER VAPOUR

* DUST &SMOKE

OTHER S

water vapour
WATER VAPOUR

WATER VAPOUR IN AIR IS AN IMPORTANT PART OF WATER CYCLE

oxygen
OXYGEN
  • HELPS IN BURNING
  • ESSENTIAL FOR BREATHING
slide9

ACTIVITY:

  • TAKE WATER IN A CONTAINER AND HEAT IT.

WE OBSERVE TINY BUBBLES ON THE SURFACE OF VESSEL , AFTER SOME TIME.

THESE BUBBLES COME FROM AIR DISSOLVED IN WATER.

slide10

OXYGEN PRESENT IN AIR IN BETWEEN SOIL PARTICLES IS USED BY SOIL ORGANISMS.

  • OXYGEN DISSOLVED IN WATER IS USED BY AQUATIC ORGANISMS
slide11

EARTHWORMS COME OUT OF THEIR BURROWS DURING RAIN .

WATER occupis all spce in between the soil particles ,replacing air.Eatrh worms find it difficult to breath.

nitrogen
NITROGEN
  • NITROGEN DOES NOT SUPPORT BURNING.
  • IT IS AN IMPORTANT PLANT NUTRIENT.
carbondioxide
CARBONDIOXIDE
  • RELEASED IN THE ATMOSPHERE DURING RESPIRATION ,BURNING, DECOMPOSITION etc.
carbondioxide1
CARBONDIOXIDE
  • USED BY PLANTS FOR PHOTOSYNTHESIS.
carbondioxide2
CARBONDIOXIDE
  • IT CAN EXTINGUISH FIRE.
slide17
DUST
  • DUST PARTICLES ARE PRESENT IN AIR.
  • Hairs present in nasal cavity prevent the dust particles from entering into the respiratory system.
smoke
SMOKE
  • RELEASED BY VEHICLES, FACTORIES, KITCHEN

BURNING OF OTHER MATERIALS.

  • CONTAIN HARMFUL GASES LIKE , OXIDES OF NITROGEN, SULPHUR, CARBON etc.
oxygen cycle
OXYGEN CYCLE

PHOTOSYNTHESIS

RESPIRATION

[CARBONDIOXIDE]

[OXYGEN]

fill in the blanks
FILL IN THE BLANKS

MIXTURE

  • 1.AIR IS A ----------------------OF GASES.
  • 2.THE ENVELOPE OF AIR AROUND EARTH IS--------------.
  • 3.THE MAJOR CONTENT OF AIR IS -----------------GAS.
  • 4. --------------------GAS IS ESSENTIAL FOR BURNING.
  • 5. THE GAS USED FOR PHOTOSYNTHESIS IS -----------------.
  • 6.EARTH WORM BREATH AIR PRESENT IN ------------
  • 7.FISHES BREATH OXYGEN PRESENT IN --------------.
  • 8.---------------------------GAS CAN EXTINGUISH FIRE.

ATMOSPHERE

NITROGEN

OXYGEN

CARBONDIOXIDE

SOIL

WATER

CARBONDIOXIDE

say true or false
SAY TRUE OR FALSE

TRUE

FALSE

  • 1.MOVING AIR IS CALLED WIND.
  • 2.AIR DOES NOT NEED SPCE TO OCCUPY.
  • 3.CARBONDIOXIDE SUPPORTS BURNING .

4. EARTHWORMS BREATHE AIR PRESENT IN SOIL.

  • 5. PLANTS AND ANIMALS DEPEND ON EACH OTHER FOR EXCHANGE OF OXYGEN AND CARBONDIOXIDE FROM AIR.

6.HAIRS INSIDE THE NASALCAVITY FILTER CARBONDIOXIDE PRESENT IN AIR.

FALSE

TRUE

TRUE

FALSE

ad