an ice cube is set on a table at room temperature for 3 hours. what happens to the temperature of the ice cube and the table

What are the student's observations and inferences before he starts his investigation?

Which of the following is a responsibility of a scientist

Each member of a class sampled a piece of ptc testing paper. thirty people sampled the chemical. twenty persons were tasters. how many had heterozygous genes? 10 20 0-20 indeterminate