13. State the three conditions that needed for combustion to take place.
14. How will you differentiate between zygote and an embryo?
Answers
Explanation:
13. State the three conditions that needed for combustion to take place.
Answer : Necessary Conditions for Combustion
Heating the combustible substance to its ignition temperature. The presence of fuel plays an important role. The presence of air or oxygen. Ignition temperature is maintained (it is defined as the substance that catches fire at its lowest temperature).
14. How will you differentiate between zygote and an embryo?
Answer: An embryo is the early stage of human development in which organs are critical body structures are formed. An embryo is termed a fetus beginning in the 11th week of pregnancy, which is the 9th week of development after fertilization of the egg. A zygote is a single-celled organism resulting from a fertilized egg.
Answer:
13.Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.
There must be Fuel to burn.
There must be Air to supply oxygen.
There must be Heat (ignition temperature) to start and continue the combustion process.
14.An embryo is the early stage of human development in which organs are critical body structures are formed. An embryo is termed a fetus beginning in the 11th week of pregnancy, which is the 9th week of development after fertilization of the egg. A zygote is a single-celled organism resulting from a fertilized egg