Answer:
1. B
2. A
3. D
4. E
5. C
Explanation:
Energy can be defined as the ability (capacity) to do work. The various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.
The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.
Some of the terminologies associated with energy includes the following;
1. Fuel cell: produces electrical energy chemically. It is a technology that operates just like batteries but do not need to be recharged since it doesn't run down. Also, it comprises of two (2) electrodes which are: positive electrode (cathode) and negative electrode (anode), with an electrolyte embedded in between them.
2. Alternative energy: energy sources that are still in development. These includes energy source other than fossil fuels. Some examples are petroleum, diesel and coal.
3. Energy conservation: includes lifestyle changes. It involves energy saving actions in order to reduce the level of energy consumption such as daylight savings, energy saving bulbs, etc.
4. Ocean thermal energy conversion (OTEC): produces electrical energy using the temperature difference between two layers of water.
5. Energy efficiency: percentage of energy that does useful work. It determines the amount of work that can be done at a particular time.
Answer:
The main difference between Public Sector and Joint Sector is on ownership. A public sector enterprise or industry is completely owned and controlled by the government while the Joint Sector enterprise, as the name, implies shares the ownership between government and private entrepreneurs.
Explanation:
Answer:
Importance of food security.
Explanation:
Food security refers to the availability of food to everyone at all the time and at a reasonable prices. All nutrients and health factors that comes from food is very essential and important and all these cannot be extracted via any single plant. We need a combinations of plants to get all the energy required and also maintain a balance in nature so that the plant does not become extinct. Hence , if we use a variety of plants we can create that balance in nature and also stay healthy and fit ,
Therefore ,
variety in plants is important for food security.
<span>The birthrate and the death rate were about equal.</span>
