Question

what is repetition in an experiment? a doing something over again b changing variables in an experiment c writing a paper about the experiment d making an educated guess for what might happen during an experiment what is a sample size in an experiment? a a type of animal used in the experiment b a small part of something that represents something larger c the amount of substance used in a chemical reaction d the type of microscope used to view samples what are some variables that can be used in an experiment about growth? a type of grass, soil, water, location, pots b type of grass, soil, cars, books, trees c type of grass, soil, pencils, crayons, toys write the correct answers. 3.15 what are three ways scientists share their results?

Explanation:

1. In an experiment, replication means doing something over again to verify results. Option A is correct for "What is replication in an experiment?".
2. Sample - size in an experiment refers to a small part of something that represents something larger. Option B is correct for "What is a sample size in an experiment?".
3. Variables for grass - growth experiment can be type of grass, soil, water, location, pots etc. Option A is correct for "What are some variables that can be used in an experiment about growth?".
4. Scientists share results through publishing papers, presenting at conferences, and creating posters.

Answer:

1. A. doing something over again
2. B. a small part of something that represents something larger
3. A. type of grass, soil, water, location, pots
4. Publishing papers, presenting at conferences, creating posters