Investigation 1: Separating Mixtures and Solutions - Ms ... - Free Printable

Since the user has set both `ExplainAnswer` and `TeachTopic` to false, and no specific question was asked about the image (other than the implicit "solve the problem"), I will interpret this as a request to complete the worksheet's main task: filling out the results table based on scientific principles of separation.

The worksheet asks the student to predict or record the results of separating Gravel, Powder, and Salt using a Screen and Filter Paper.

Step 1: Analyze the Materials and Tools
* Materials: Gravel (large stones), Powder (fine particles like sand or flour), Salt (tiny crystals).
* Tools:
* Screen: A mesh with relatively large holes. It separates large objects from small ones.
* Filter Paper: Paper with microscopic pores. It separates solids from liquids (or very fine solids from coarse ones if dry, but usually used for filtration).

Step 2: Analyze the Procedure
The procedure involves:
1. Placing a screen over a cup.
2. Stirring the mixture.
3. Pouring the mixture through the screen.
4. Pouring the mixture through the filter paper.

Step 3: Determine the Results for Each Material

* Gravel:
* *Screen:* Gravel pieces are large. They will get stuck on top of the screen.
* *Filter Paper:* If the gravel made it to the filter (which it shouldn't, based on step 3), it would still be too big to pass through the tiny pores of the filter paper. It would stay on top.
* *Result:* Stays on Screen / Stays on Filter Paper.

* Powder:
* *Screen:* Powder particles are small. They will fall through the holes of the screen.
* *Filter Paper:* Powder is fine, but often larger than the pores of standard filter paper (depending on the powder, e.g., sand vs flour). However, in typical elementary science contexts, "powder" or "sand" is often caught by filter paper while salt dissolves. If it's dry powder, it might get stuck on the filter paper. If it's a mixture with water, the powder stays on the paper.
* *Result:* Falls through Screen / Stays on Filter Paper.

* Salt:
* *Screen:* Salt crystals are tiny. They will easily fall through the screen.
* *Filter Paper:* Salt dissolves in water to form a solution. The dissolved salt particles are so small they pass right through the filter paper. If the salt is dry, it also falls through the paper due to gravity and size, but usually, this experiment implies mixing with water. The prompt asks to use the word "dissolve," implying water is used.
* *Result:* Falls through Screen / Falls through Filter Paper (into the cup below).

Step 4: Formulate the Table Entries
The table asks what happens when you use the Screen and Filter Paper.

* Row 1 (Gravel):
* Screen: Stays on top (Retained)
* Filter Paper: Stays on top (Retained)
* Row 2 (Powder):
* Screen: Goes through (Passes)
* Filter Paper: Stays on top (Retained)
* Row 3 (Salt):
* Screen: Goes through (Passes)
* Filter Paper: Goes through (Passes/Dissolves)

Step 5: Formulate the Observations
The bottom section asks to use the words: *solution, mixture, and dissolve*.
* Observation: The gravel and powder formed a mixture that could be separated. The salt dissolved in the water to form a solution that could not be separated by filtering.

Final Answer Construction:
I will provide the completed table content and the observation sentence as the "Final Answer" since that is the core "problem" to be solved on the sheet.

Final Answer:
Table Results:

| | Screen | Filter Paper |
| :--- | :--- | :--- |
| Gravel | Stays on top | Stays on top |
| Powder | Falls through | Stays on top |
| Salt | Falls through | Falls through |

Observations:
The gravel and powder are solids that do not dissolve, so they stay behind as a mixture. The salt dissolves in the water to create a solution, which passes through the filter paper.