Observation

In: Science

Submitted By btolfree
Words 676
Pages 3
Bsma Tolfree
Unit 1 Individual Project
Scientific Method
May 1, 2011

OBSERVATION:
During the winter, you spread salt daily on your driveway to melt the snow. In the springtime, when the lawn begins to grow, you notice that there is no grass growing for about three inches from the driveway. Furthermore, the grass seems to be growing more slowly up to about one foot from the driveway.
QUESTION:
I wonder if the grass growth is inhibited by salt?
INTRODUCTION:
Salt is a chemical compound (NaCl), or Sodium Chloride. Sodium Chloride has many uses in everyday life, such as in our bodies, in our food, and on our road ways. Having two elements, Sodium and Chloride, each have a number of jobs to do in our bodies. Salt is found in many of our foods naturally, from fish to vegetables, as well as being used for cooking and at the table. Also salt is used all over the world when it snows to prevent slip and falls and car accidents by it being sprinkled on sidewalks and road ways to melt the ice. When salt hits water or ice it lowers the freezing point in an effect known as freezing point depression and melting it in the process. According to (greenergreengrass.com) salt can also affect the pH of soil and can create an unsuitable environment for grass and plants to grow.
HYPOTHESIS:
The grass that gets exposed to more salt will not grow as much as the grass that gets exposed to little or no salt.
PREDICTION:
If the grass is exposed to salt then it will not grow as fast as the grass that is not exposed to salt at all.
CONTROLLED EXPERIMENTAL METHOD:
Ten patches of grass (1ft x 1ft) will be tested.
At the beginning of the experiment we will start with ten patches of grass all which are 1ft x 1ft, and two inches tall. Every other day for seven days I will salt eight of the ten patches of grass. Two patches of grass will be salted with three grams of salt, two…...