The right answer is screening test.
In medicine, screening consists of looking for one or more diseases or abnormalities known as "at risk" in individuals of a given population.
These investigations are followed or not by medical consultations, clinical examinations and treatments.
In addition, screening is a preliminary procedure (test or examination) to detect one or more characteristic signs or symptoms of a disease or syndrome and potentially leading to further investigation.
 
        
                    
             
        
        
        
Answer:
One 
Explanation:
An element is a pure substance in which there are only one kind of atom. Elements are distinct substances that cannot be split up into simpler substances. 
Such substances consists of only one kind of atom. There are over a hundred known elements to date. 
Generally, as a pure substance, the composition of an element is definite and they are homogenous in all parts. 
 
        
             
        
        
        
group 1 elements are metals with<u> low</u> density 
 
        
             
        
        
        
The moon is what makes currents so if there was no moon there would be no current in our oceans. The way it makes currents is from the gravitational pull.
Brainliest? :)