Question

apply inquiry and review the big idea write the answers to these questions. 18. aaliya knows that sliced apples turn brown when left out in the open air. she also knows that pouring certain liquids on them will keep this from happening. aaliya thinks that water, ginger ale, or lemon juice may do the trick. how could aaliya set up an experiment to gather evidence to support a claim about these liquids? what are the variables? what will she use as a control?

Explanation:

To set up the experiment:

1. Prepare several identical apple slices.
2. Divide them into groups: one group with no liquid (control), one with water, one with ginger ale, one with lemon juice.
3. Leave all slices in the same open - air environment and observe the browning over time.

Variables:

• Independent variable: The type of liquid (water, ginger ale, lemon juice, or no liquid for control).
• Dependent variable: The degree of browning of the apple slices.

Control: An apple slice left in the open air with no liquid poured on it. This serves as a baseline to compare the effect of the other liquids.

Answer:

Experiment Setup:

1. Take multiple (e.g., 4) sets of identical apple slices (same size, from the same apple, etc.).
2. Label the sets as "No Liquid", "Water", "Ginger Ale", "Lemon Juice".
3. Pour the respective liquids (or nothing for the control) on the slices and place all sets in the same open - air environment (same temperature, humidity, etc.).
4. Observe and record the browning of each slice at regular intervals (e.g., every 15 minutes) for a set period (e.g., 2 hours).

Variables:

• Independent Variable: The type of liquid (water, ginger ale, lemon juice, or no liquid).
• Dependent Variable: The extent of browning of the apple slices (can be measured by visual inspection, using a color scale, etc.).

Control:

The apple slice with no liquid poured on it (the "No Liquid" set) is the control. It provides a reference to see how the apple browns naturally, so the effect of the other liquids can be compared against this natural browning process.