Answer:
Class 8
What are natural resources?
How does land fulfil our needs?
Name a few landforms.
What are the factors that determine the pattern in which a particular region is used?
Mention some methods that are used to conserve soil?
Class 7
Name the brightest flower on tall trees.
How is natural vegetation classified?
Why do type and thickness of natural vegetation vary from place to place?
Write down the features of Tropical Evergreen Forests.
Write the features of Tropical Deciduous Forests.
Where are Temperate Evergreen forests located?
Which region is called the “orchards of the world” and why?
Write major features of Mediterranean Vegetation.
Explain major features of Tundra Type of Vegetation
4.6 billion years ago - most likely hydrogen (H2) and helium (He)
probably rich in hydrogen compounds like methane (CH4), ammonia (NH3), hydrogen cyanide (HCN), water (H2O), and formaldehyde (HCHO). Also some N2, CO2 but LITTLE or NO free oxygen.
Molecules of H2 and He move really fast, especially when warm, that they eventually all escaped Earth's gravity and drifted off into space.