Show:
Birds
Physics of Bird Flight
Mammals
Reproduction
Adaptation
100
This is the reason why birds usually sit on their eggs
What is to keep the eggs warm
100
This is what provides the bird a lift (to help fly)
What is the angle and shape of a bird's wings.
100
These are the four characteristics shared by all mammals
What is endothermic, have hair, four chambered heart and two looped circulatory system, young fed on mother's milk.
100
This is the time between fertilization and birth
What is gestation period
100
These are the adaptations that enable the birds to fly.
What is wings, feathers, hollow bones, strong chest muscles, air sacs.
200
This is the organ where birds store food before the food goes to the stomach. This is the muscular thick-walled part of a bird's stomach where partially digested food is ground up.
What is crop. What is gizzard.
200
This is what causes air pressure in air. This is how the speed of moving air is related to air pressure.
What is air molecules pushing. What is the faster the air moves, lower is the pressure exerted.
200
This is a large muscle that helps the mammals breathe. This is the part of the mammals body where oxygen enters the bloodstream.
What is diaphragm. What are the lungs.
200
This is the organ through which some mammals receive food and oxygen from their mothers during gestation
What is placenta
200
These are the two functions of the feathers.
What is steering and balancing in flight (contour feathers) and keeping warm (down feathers).
300
These are the six characteristics shared by birds
What is endothermic vertebrate, feathers, four-chambered heart, lay eggs, scales on feet and legs, and most can fly.
300
This is the reason why a fast flying bird will experience more lift compared to a slow flying bird.
What is difference in air pressure between top and bottom of a wing is greater in fast flying bird compared to slow flying bird. The air pressure above the wing is lower as the air is moving faster and air pressure below the wing is higher as it is slower. This causes lift.
300
These are the three main groups of mammals and this is how they are classified.
What are monotremes, marsupials, and placental mammals. They differ in how their young develop.
300
This is the comparison between bird and reptile reproduction
What is they both have internal fertilization and lay eggs. Bird egg shells are harder. Female bird lay eggs in the nest built by one or both parents. Reptiles do not care for eggs after laying them, birds do.
300
These are the four kinds of mammal teeth and these are their comparisons.
What is incisors (sharp edge used for cutting and biting off food), canines (pointed teeth used for stabbing and tearing), premolars and molars (broad flattened surfaces used for grinding food).
400
This is the term used when birds zip the barbs of the wings together and make the feathers flat.
What is preening
400
These are the three types of flying.
What is flapping, soaring and gliding, and diving
400
These are the mammals that lay eggs and these are classified into three species and examples.
What is monotremes. Two species of spiny anteaters and one duck- billed platypus.
400
The young of marsupials at birth are this compared to young of placental mammals.
What is less developed.
400
This is what is inferred about the climate where it lives when a mammal has a dense coat of fur.
What is it lives in a very cold climate.
500
This is what happens to a seed from the time it is eaten by a bird till it leaves the stomach.
What is the seed is picked up by the bill but not chewed. The seed is stored in the crop after moving from the mouth. Then it goes to the stomach where the digestive juices are added and then the gizzard crushes it before passing out of the stomach.
500
This is the comparison between the three types of flying.
What is flapping (continuously flapping wings) requires a lot of energy. Gliding and soaring, and diving don't require much energy. In gliding/soaring the wings are outstretched. Gliding birds fly downward, soaring they fly upward. Diving, wings are tucked in, and gravity takes over so no lift is used.
500
These are the mammals that have very short gestation period and hence the young are developed at very early stage of development. These are some better known marsupials.
What is marsupials and the young continue developing in their mothers' pouch after birth. They are koalas, kangaroos, and opossums.
500
This is what all mammals feed their young with
What is milk.
500
Placental mammals are divided into groups based on these adaptations
What is how they eat.