Answer:
Common examples include carbon, sulfur, oxygen, iron, copper, aluminium. Elements are represented by symbols. Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.
Explanation:
Substances can be categorised as either elements or compounds. Both of these are made up of atoms, the only difference is an element is made of one type of atom whereas compounds are made of two or more different types of atoms.
I think that these factors are :the type of radiation , the duration of exposure to the radiation and the amount of radiation exposure. Radiation is commonly used to treat many medical conditions. Frequently used as a therapy for various forms of cancer, it is common for radiation to cause death of cells both cancerous and healthy cells in the areas irradiated. The extent of damage caused depends on the type of radiation irradiated, the duration of exposure and the amount of radiation.
Answer:
c. Each key is organized as a flowchart.
Explanation:
A dichotomous key is a device that enables users to recognise natural world objects, such as wildflowers, trees, reptiles, mammals, fish and rocks. it used for the Identification whereby groups of species are frequently divided into two categories with increasing sequential division, more information on the basic characteristics of a particular organism is released.
Dichotomous keys are represented in two ways including either as descriptive representation in which a series of paired statements arraged in a numbered sequence or as a branching flowchart (diagrammatic representation)
.
Hence, the correct option is c.
Answer:
Which part of the human body controls the nervous system?
Brain
Explanation:
Nervous system is made up of the brain and the spinal cord, as the brain controls everything
