What is the purpose of including a control group in an experiment

When determining the presence of inorganic constituents such as sulfates, phosphates, and chlorides, you will be looking for the "formation of a precipitate." what is a precipitate?

How do clouds affect the climate?

Max kept 100 grams of radioactive iodine in a container. He observed the amount of iodine left in the container after regular intervals of time and recorded them in the table shown below

How are the cells of a person with down syndrome different than those of a person without it?

What genetic factors might be responsible for a change in an organism's body plan

If I turn my computer off at least once a week, it will run faster. What is the independent variable? What is the dependent variable? What are some controlled variables?

Which process is a "build up" process

Volcanoes, lightning, and the combustion of fossil fuels ALL contribute to acid precipitation. true false

Does an electric current cause a coiled wire to become an electric bell

Which is a renewable resource? A) coal B) sunshine C) gasoline D) natural gas