Question

Worksheet 19

Class 4

Science

Topic : Amphibians and Aerial animals

Q1 . Write the adaptations in frogs .

Ans . Adaptations in frogs are :

( a ) it lays eggs in water and young ones live in water till they grow

( b ) tadpoles have finned tail to help them swim , and gills to breathe .

Q2 . Write the features of birds that help them to fly in air

Ans . ( a ) Birds have strong and large breast muscles to pull the wings down as well as up

while flying

( b ) they have hollow bones filled with air sacs that make their weight light

( c ) they have flight feathers which help them to to fly without tilting in the air

Q3 . ______ ( butterflies / dragonflies ) can beat their Wings together or separately .

Ans Dragonflies​

Answer 1

Answer:

There are more than 4,000 different kinds of amphibians. Members of this animal class are frogs, toads, salamanders, newts, and caecilians or blindworms.

Aerial Animals! Aerial animals are basically any animal who can naturally fly, glide, or soar in the air. Aerial animals include birds, insects, bats, sugar gliders, flying squirrels, and many others! Flying ants are part of the moving process of a(n) colony of ant.

Frogs that spend more time in water have long, very strong legs. They use these legs for jumping and swimming long distances, mostly to escape from predators or catch prey. Some frogs also have webbed feet, which is just skin between their toes. This also helps them swim faster and longer.Frog adaptations such as a small waist, no neck and a broad, flat skull make his body streamlined for swimming. The frog's skin is thin, which allows for air to pass through, in effect allowing him to breathe through his skin. Powerful hind legs and feet allow the frog to jump long distances.

Adaptations in frogs are:it lays eggs in water and young ones live in water till they grow.

Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag. a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight. an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust.Birds have strong and large breast muscles to pull the wings down as well as up  while flying.

Dragonflies​.