Flying in Birds 0.0 / 5 ? OtherWildlife EcologyUniversityNone Created by: Maria5Created on: 04-05-19 17:40 Wing aerofoils are similar to what? Hydrofoils 1 of 29 What is an aerofoil? Wing 2 of 29 The airflow over the curved surface of a wing alters the --- of the air creating a pressure difference that generates --- velocity, lift 3 of 29 Lift counteracts what force? Gravity 4 of 29 What happens if the wing stalls? The bird falls 5 of 29 What allows owls to pass through the air very gently and hover with minimal effort without stalling very low wing loading 6 of 29 Wing area, speed of airflow and angle of incidence are all factors that affect what? Lift 7 of 29 Gliding birds e.g. albatross have High Aspect Ratio 8 of 29 High speed birds e.g. swallows have High Aspect Ratio 9 of 29 Rapid take off birds e.g. pigeon have Low Aspect Ratio 10 of 29 Soaring birds e.g. vultures have Low Aspect Ratio 11 of 29 Can birds change the shape and thus performance of their wings? Yes 12 of 29 What type of feathers are used to increase lift when landing? Feathers of the alula 13 of 29 Thin hair like structures that cover owl feathers do what? Trap air within the feather surface 14 of 29 On their foremost wing, owls have a row of tiny --- that help to deaden the sound of air hitting the wings' leading edge hooks 15 of 29 The sternum is --- to provide large attachment area for --- & --- flight muscles keeled, depressor & elevator 16 of 29 What type of bones provide massive rigid support when flight muscles contract coracoid 17 of 29 What type of bones are fused to keep shoulders apart during flight? clavical 18 of 29 During forward flapping flight the wings are --- on the downstroke but --- against the body on the upstroke extended, folded 19 of 29 Depressor muscles are very powerful, they contribute to what % of the body weight? 15% 20 of 29 Elevator muscles are what % of the size of depressor muscles? 10-15% 21 of 29 In humming birds elevator muscles are what % of the size of depressor muscles? 50% 22 of 29 Air flowing over a fixed wing generates --- A spiralwake 23 of 29 Parasitic drag is due to friction of the body 24 of 29 Profile drag is due to friction of the wings 25 of 29 Induced drag is due to beating wings 26 of 29 In bounding flight folding the wings against the body every how many cycles, reduces drag? 5 27 of 29 In what type of flight does the sinking speed depend on the air speed? Gliding 28 of 29 In what type of flight do following birds gain lift from the trailing vortex formed by the wake of the bird in front? Formation flying 29 of 29
Comments
No comments have yet been made