Question

1. choose the best answer.

the base unit for mass is _.
mole
meter
gram
kelvin

1. choose the best answer.

which two are ways scientists can reduce bias in their research?
remain transparent.
only do the experiment once but perfectly.
only work with friends.
make sure the experiment is repeatable.
only use the most expensive equipment.

Explanation:

• For question 13:
• The mole (\(mol\)) is the base unit for the amount of substance.
• The meter (\(m\)) is the base unit for length.
• The gram (\(g\)) is not a base unit; the base unit for mass is the kilogram (\(kg\)), but among the given options, gram is a unit of mass (though not the SI base unit, in some contexts when base unit for mass is asked and kilogram is not an option, gram is a mass - related unit).
• The kelvin (\(K\)) is the base unit for temperature.
• For question 14:
• Remaining transparent helps in reducing bias as it allows others to check the research process.
• Making the experiment repeatable helps in validating the results and reducing the impact of random errors or biases in a single - run experiment.
• Doing the experiment only once may lead to undetected errors or biases.
• Working only with friends can introduce personal biases.
• Using only the most expensive equipment does not directly relate to reducing bias.

Answer:

1. gram
2. Remain transparent, Make sure the experiment is repeatable