1.Assertion: Lightning is a useful natural phenomena. Reason: It helps in regulation of nitrogen cycle and formation of ozone.
2.Assertion: Body having electric charge on it is called a charged body. Reason: There is only one type of charge i.e. negative.
3.Assertion: Cells are microscopic in structure and cannot be seen with naked eye. Reason: Microscope is an instrument that helps to observe tiny objects.
4.Assertion: All organs that work together to perform a specific life function is called tissue. Reason: Different cells join together to form an organ.
5.Assertion: The incident rays, reflected rays, and the normal all lies in the same plane. Reason: Angle of incidence= Angle of reflection..
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Answers
Answer:
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Explanation:
1: Lightning is caused by the accumulation of charges in clouds. Reason : The process of meeting of negative and positive charges to release huge amount of energy is called electric discharge.
2: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless. Reason: No electric lines of force exist inside a charged body but magnetic lines do exist inside a magnet
3: The microorganisms are the microscopic bodies which cannot be seen directly with the naked eye. These organisms are of the size in microns. The study which deals with the microbes is known as microbiology. There are the different types of microbes like bacteria, viruses, fungi, etc.
4:An organ system is a group of organs that work together to perform various functions. Circulatory system (constituted by heart, blood vessels etc) and digestive system (constituted by organs like oesophagus, stomach etc) are examples of organ systems.
5: From the laws of reflection, we know that
The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence, all lie in the same plane.
Answer:
1: Lightning is caused by the accumulation of charges in clouds. Reason : The process of meeting of negative and positive charges to release huge amount of energy is called electric discharge.
2: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless. Reason: No electric lines of force exist inside a charged body but magnetic lines do exist inside a magnet
3: The microorganisms are the microscopic bodies which cannot be seen directly with the naked eye. These organisms are of the size in microns. The study which deals with the microbes is known as microbiology. There are the different types of microbes like bacteria, viruses, fungi, etc.
4:An organ system is a group of organs that work together to perform various functions. Circulatory system (constituted by heart, blood vessels etc) and digestive system (constituted by organs like oesophagus, stomach etc) are examples of organ systems.
5: From the laws of reflection, we know that
The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence, all lie in the same plane.
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Explanation: