Question

scenario#2: egg in vinegar sam places an egg in a cup of vinegar and notices that after a few days, the shell starts to dissolve. sam wonders if the type of liquid will change how quickly the shell dissolves. to test this, sam places three eggs in three different cups: one with vinegar, one with lemon juice, and one with plain water. he checks the eggs every day for 5 days and records his observations. 1. write the question sam is investigating. 2. identify the hypothesis. 3. label the independent variable. 4. label the dependent variable. 5. list at least 3 controlled variables (things kept the same). 6. after 5 days, what kind of data could sam collect? (measurements, observations, etc.)

Explanation:

1. The question Sam is investigating is stated in the text as his wonder about the liquid - type effect on shell - dissolution rate.
2. A possible hypothesis could be that different liquids will dissolve the egg - shell at different rates.
3. The independent variable is the type of liquid as it is the variable being changed.
4. The dependent variable is the rate at which the egg - shell dissolves as it depends on the type of liquid.
5. Controlled variables could be the size of the eggs, the temperature of the environment, and the volume of the liquid in each cup to ensure a fair test.
6. Sam could collect data such as the amount of shell remaining (measurement), the texture of the shell (observation), and whether any bubbles are present (observation).

Answer:

1. Does the type of liquid change how quickly the egg - shell dissolves?
2. Different liquids will dissolve the egg - shell at different rates.
3. Type of liquid
4. Rate at which the egg - shell dissolves
5. Size of the eggs, temperature of the environment, volume of liquid in each cup
6. Amount of shell remaining (measurement), texture of the shell (observation), presence of bubbles (observation)