Answer:
Constant variables
Explanation:
Elaina's investigation lacked the critical ingredient of constant variables which are important components of every scientific investigation. In every research, there are 3 important variables, namely:
1. Dependent variables: the actual variable to be measured during the course of investigations and whose values are dependent on another variable (independent variable) supplied by the investigators.
2. Independent variable: one of the variables that are supplied by investigators whose values are often manipulated to see the kind of changes it will cause to the dependent variable.
3. Constant variables: other variables that are neither independent nor dependent but constant for all the various experimental groups in investigations.
The sackbut is the instrument related to the modern trombone.
Well it helped the animals and humans grow the population.
Yes, short answer, I can not give you the specifics (consult your biology textbook)
Atoms do differ in their affinity for neutrons, a property called electronegativity. Therefore, true is the correct answer.
