ju5lekshiasimm ju5lekshiasimm

20-01-2017
Chemistry

contestada

Why is a control needed in a valid experiment?

Respuesta :

damselflypc damselflypc

20-01-2017

You need a control so you have something to compare the experimental group on-- If you don't have a control group, how will you know what's changed?

Answer Link

Otras preguntas

Gabriel saves 40% of his monthly paycheck for college. He earned $270 last month. How much money did Gabriel save

Samantha has $45 to spend on a new dress. Select all of the following options that Samantha can afford. A $45 green dress with 10% tax. A $40 red dress with 5%

Which nation rejected the Treaty of Versailles, negotiating its own peace agreement with Germany in 1921?

Help me plz!!! The system of equations is inconsistent. What are the missing values? 5x+___y=2 ___x+3y=8

one cell phone plan charges 20$ per month plus$0.15 per minute used. A second cell phone plane charges $35 per month plus $0.10 per minute used. write and solv

An 18 kg bicycle carrying a 62 kg girl is traveling at a speed of 7 m/s. What is the kinetic energy of the girl and bicycle?

After World War II, Stalin said that the Soviet Union needed a “buffer zone” to protect it from attack. This idea resulted in the USSR expanding its control int

Charlie has 5 times as many stamps as Ryan. They have 1,608 stamps in all. How many more stamps does CHarlie have than Ryan?

How is the circulatory system similar to a road-and-highway system?

What is discovered at Temperance Tavern? What was Huck afraid had been discovered?