Overcoming (v) Gravity (n) Subject: Science (Grade 4) Prepared by: Faculty member of PGS.

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Presentation transcript:

Overcoming (v) Gravity (n) Subject: Science (Grade 4) Prepared by: Faculty member of PGS

Overcoming (v) Gravity (n)  There are several ways to overcome gravity 1. By very large force 2. By hot air balloons 3. By air resistance

By using force: Overcoming (v) Gravity (n) Produce (v) a force (n) Bigger (adj) then The pull (v) of Gravity (n) Birds (n) Upwar d Force (Lift)

By using force: Overcoming (v) Gravity (n) Aircrafts (n) Engine + Wings (n) produce (v) upward (lift) force (n) Bigger (adj) then The pull (v) of Gravity (n)

By using hot air balloons: Overcoming (v) Gravity (n) The hot ( ) air (n) produces (v) a upthrust ( ) force (n) Bigger (adj) then The pull (v) of Gravity (n)

Overcoming (v) Gravity (n) If upward push ( ) of Air resistance (n) Balanced (adj) The downward pull Of gravity (n) Body (n) falls (v) very slowly (adv)

Overcoming (v) Gravity (n) If upward push ( ) of Air resistance (n) Not Balanced (adj) The downward pull Of gravity (n) Body (n) fall (v) rapidly (adv) to the ground (n) 180 Km/h