To test the quality of water sources in her area, shameka collects five samples from each water source and tests the quality of each sample.

which important step of scientific design is shameka conducting?

repetition

replication

verification of results

using controlled variables

Verification of Results

Explanation:

The process of collecting five sample of water from different sources is carried to verify the

Iresult. By collecting water from five different location of same source the researcher can truly ascertain the quality of the water in her vicinity of stay.

If after samples are tested it is discovered the water isn't healthy, the results would be accepted as it has been properly verified and appropriate action would be taken.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

here are some of the ways in which chemical and nuclear reactions differ.

explanation: