Answer:
The percentage of space not occupied by solid matter in soil is called :
B. Porosity.
Explanation:
- Porosity is represented as the percentage of void in the soil.
- In simple words, it is the number of pores present in a soil.
- The porosity of soil is a factor that determines the quality and suitability of the soil for agriculture.
- A more porous soil does not hold lot of water and nutrient while a less porous soil retains water and nutrient.
- Thus neither a extremely porous nor a less porous soil is suitable for agriculture.
4-c
5-b
6-a
7-d
8-c
hope this helps
Hydrogen and Sodium are both part of the alkali group.
Hydrogen has an atomic weight of 1.008 while Sodium has an atomic weight of
22.99. Hydrogen has only one electron while Sodium also has one electron in the
outer shell. So both Hydrogen and Sodium has a charge of +1. Hydrogen is
actually a gas while Sodium is a metal. Sodium is never a diatomic molecule,
whereas Hydrogen is a diatomic molecule. So it can be seen that there are
similarities as well as differences between Hydrogen and Sodium.
Answer:
There are 2 types of cellular respiration i)Aerobic respiration
ii)Anaerobic respiration
Explanation:
i)Aerobic respiration: is the chemical reactions in the cells that use oxygen to break down food molecules to release energy. Its complete oxidation process that releases more energy (2830 $ J). The word equation of aerobic respiration is:-
glucose + oxygen------> carbon dioxide + water + energy.
ii) Anaerobic respiration: is the chemical reactions in cells that break down food to release energy without using oxygen. Its partial (incomplete) oxidation process that release a few energy (188 $ J) The word equation of anaerobic respiration in human muscles:-
glucose-----> lactic acid
The word equation of anaerobic respiration in yeast:-
glucose yeast alcohol + carbon dioxide
------->
