Scientific Method
Explain what the control is during an experiment.
The control is something that doesn't change throughout the experiment and serves to compare with the experiment group.
What charge does an electron have?
-1
What charge does a Calcium ion have?
+2
How many grams are in 1 mole of H2O?
18g
Ruben wants to see if he could lift more at Crunch after taking pre-workout. He works out without it one day and records his reps, then the next day he takes pre workout and does the same workout, recording again. What is the control and dependent variable?
C: Day without preworkout
DV: number of reps
P=N>E
How many protons and electrons does O2- have?
E: 8
P: 10
How many molecules are in a cup containing 50g of NaCl?
5.15 x 1023
Dr. Dunlavy wants to test if there's a correlation between happiness and diet coke. She gathers all the SI facilitators and gives one third of them diet coke and one third of them broccoli and one third of them nothing, then asks them to record how happy they are on a scale from 1-10 while consuming. Identify the independent variable, dependent variable, and the control.
IV: What item the facilitators got
DV: Happiness rating
C: People who got nothing
How many valence electrons does a Fluoride ion have?
8
An ion has 19 protons and 18 electrons. What element is it and what charge does it have?
K+
How many moles of uranium are present in a nuclear bomb with 64 Kg of the element?
268.9