A. ANSWER THE FOLLOWING QUESTIONS: [15m]
1- What is the difference between rotation and revolution?
2- What is rain water harvesting?
3- What causes air pollution? Write one way to check air pollution?
4- How feathers are important for birds?
5- What do you mean by water cycle?
6- How do leaves breathe?
7- How does animal reproduce?
B.GIVE TWO EXAMPLES : [10 m]
1) Internal organs- ------------------, ----------------
2) Mass communication- ------------------------, ------------------
3) Creepers- ------------------ ,---------------------------
4) Climbers- -----------------------, -------------------------
5) Plants do not have chlorophyll- ----------------------, -----------------
6) Amphibians- ---------------------- ,-------------------------
7) Omnivores - ------------------------- , -----------------------
8) Aquatic animals- -----------------------,------------------------
9) Endangered animals- --------------------,-------------------
10) Flightless birds - ----------------- ,
Answers
Exercise A
Answer:
Rotation is the movement of Earth on its own axis while revolution is the movement of Earth around the sun following a path called orbit.
Rainwater harvesting is the collection and storage of rain water.
Air pollutants like smoke,dust etc. causes air pollution .One way to check air pollution is purchase an indoor air quality monitor.
Feathers are very important for a bird as they help the bird fly.
Water cycle is a process of continuous movement of water within the earth and the atmosphere.
Leaves breathe through stomata.
Animals reproduce either sexually or asexually.
Exercise B
Liver,Kidney
Television,Radio
Money plant, Butterfly pea
Cucumber, Grapevine
Venus Flytrap,Bladderwort
Frogs, Crocodile
Dog,Cat
Fish, Octopus
Bengal Tiger, Giant Panda
Kiwi,Emu