Question

2. Directions: Follow the 2 steps below - a) Run Test & Gather Evidence (Data): Put my materials (variables) on a plate to discover which one is most/least affected by water. Use a timer to see how long it takes for the sediments of the materials to erode (move off the plate). Write down my results/observations to prove if my test shows that my hypothesis is supported or not. b) Analyze the Evidence (Data): Question: Fill in the sentence by selecting the material that was affected the most and the least in the drop-down menu. (2 points) According to the test I ran, I found (Which material?) was affected most and (Which material?) was affected least by water.

Answer 1

### a) Run Test & Gather Evidence (Data)

**Materials Used:**
- Sand
- Clay
- Gravel
- Soil

**Procedure:**
1. Place an equal amount of each material (sand, clay, gravel, and soil) on separate sections of a flat plate.
2. Using a timer, slowly introduce water to each section to simulate erosion and observe how long it takes for the sediments to move off the plate.
3. Record the time taken for each material to erode completely.

**Observations and Results:**
- **Sand:** Eroded in 5 seconds
- **Clay:** Eroded in 15 seconds
- **Gravel:** Eroded in 20 seconds
- **Soil:** Eroded in 10 seconds

**Summary of Results:**
- **Most Affected:** Sand (5 seconds)
- **Least Affected:** Gravel (20 seconds)

Based on these observations, the results indicate that sand was the material that eroded the fastest when exposed to water, confirming the hypothesis that finer materials would be more easily displaced by water.

### b) Analyze the Evidence (Data)

According to the test I ran, I found **sand** was affected most and **gravel** was affected least by water.