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Write limitations in an electric generator using wind energy.
Concept: Electricity Generation using Wind Energy
Complete the following table taking into account the relation between the entries in three columns:
| I | II | III |
| Coal | Thermal energy | Thermal plant |
| Uranium | ______ | Nuclear power plant |
| Water reservoir | Potential energy | ______ |
| ______ | Kinetic energy | Wind electricity plant |
Concept: Generation of Electrical Energy
When neutron is bombarded on atom of Uranium-235, it absorbs the neutron and converts into ______.
Concept: Power Plants Based on Nuclear Energy
Observe the figure and label it properly:
- What is the figure related to?
- Why are reflectors used?
- Draw a flow chart showing different stages in such a process.
- How is the process used to generate electricity?
- What other method can be used to generate electricity using the same energy source?

Concept: Electricity Generation using Solar Energy
The Hydroelectric capacity of Koyna dam is ______.
Concept: Electricity Generation using Hydroelectric Energy
Answer the following questions from the figure:

- With reference to point B, potential energy of how much water reservoir in the dam will be converted into kinetic energy?
- What will be the effect on electricity generation if the channel taking water to the turbine starts at point A?
- What will be the effect on electricity generation if the channel taking water to the turbine starts at point C?
Concept: Electricity Generation using Wind Energy
Atomic power plant in Maharashtra is ______.
Concept: Power Plants Based on Nuclear Energy
Observe the given picture and answer the questions.

Questions:
- Identify the given diagram.
- What is the source of energy in this project?
- Why this source is supposed to be ecofriendly?
Concept: Electricity Generation using Wind Energy
Write in brief about progressive changes in animal classification.
Concept: Criteria for New System of Classification > Grades of Organization
Which of the following animals can regenerate it’s broken body part?
Concept: Non Chordates (Invertebrata) >> Phylum: Echinodermata
Re-write the statement by selecting the appropriate option.
Due to which similar characteristic honey bee and cockroach are included in the same phylum?
Concept: Non Chordates (Invertebrata) >> Phylum: Annelida
Identify the class of the animal shown in the figure and write any two characteristics.
Concept: Non Chordates (Invertebrata) >> Phylum: Echinodermata
Write the correct co-relation:
Annelida: Earthworm :: Platyhelminthes: _______
Concept: Criteria for New System of Classification > Grades of Organization
Which of the following is a hermaphrodite animal?
Concept: Non Chordates (Invertebrata) >> Phylum: Hemichordata
Which of the following animals has a hard calcareous shell?
Concept: Non Chordates (Invertebrata) >> Phylum: Mollusca
Tapeworm : Phylum Platyhelminthes : : Intestinal worms : _____________
Concept: Non Chordates (Invertebrata) >> Phylum: Aschelminthes
Petromyzon is an endoparasite.
Concept: Non Chordates (Invertebrata) >> Phylum: Aschelminthes
Draw a neat and labelled diagram.
Liver Fluke
Concept: Non Chordates (Invertebrata) >> Phylum: Platyhelminthes
Answer the questions based on the given paragraph.
Lady Bug Beetle
Lady bug beetles are friends of farmers as they destroy harmful insects. It is a predatory insect, which lives on biting worm, white fly worm, white moth, flower insects and bread worms. It acts as a natural insecticide for crops like maize, jawar, cotton, sugarcane, cereals, vegetables, fruit trees, etc. These are attractive red or yellow or grey coloured insects. Many species of this insect are found in our farms. The lifecycle of this insect follows eggs, larvae, cocoon and moth stages. The eggs are found in flutter. The larvae are grey in colour. Larvae and adults both live on sucking insects.
- How does the lady bug beetle live?
- Of which colour the lady bug beetles are?
- State the stages of its lifecycle.
- How does it help the farmers?
Concept: Non Chordates (Invertebrata) >> Phylum: Arthropoda
Give a scientific reason.
Cockroach belongs to phylum Arthropoda.
Concept: Non Chordates (Invertebrata) >> Phylum: Arthropoda
