Worksheet illustrating the difference between testable and non-testable questions with examples and a categorization activity.

Problem Overview:

The task involves categorizing questions as testable or non-testable and then converting two non-testable questions into testable ones. The key difference between testable and non-testable questions is that testable questions involve changing one variable to observe its effect on another variable, whereas non-testable questions are broader and do not specify a specific experiment or measurable outcome.

Step-by-Step Solution:

#### 1. Understanding Testable vs. Non-Testable Questions:
- Testable Questions: These questions can be answered through experiments where one variable is changed, and the effect on another variable is observed. They are specific and measurable.
- Non-Testable Questions: These questions are broad and do not specify a variable to change or measure. They often lead to science reports rather than investigations.

#### 2. Categorizing the Provided Questions:

##### Non-Testable Questions (Lead to Science Reports):
1. How do plants grow?
2. What makes something sink or float?
3. How do rockets work?
4. How does the sun heat up water?

##### Testable Questions (Lead to Investigations):
1. How does changing the amount of water affect the growth of tomatoes?
2. How does changing the type of soil affect the growth of petunias?
3. How does changing the amount of sunlight affect the growth of daffodils?
4. How does changing the type of fruit affect its ability to float in water?
5. How does changing the shape of a rocket's fins affect its ability to fly?
6. How does changing the type of water affect its ability to absorb thermal energy from the Sun?

#### 3. Converting Two Non-Testable Questions into Testable Ones:

To convert a non-testable question into a testable one, we need to specify a variable to change and observe its effect on another variable. Here are two examples:

1. Original Non-Testable Question: How do plants grow?
- Testable Version: How does varying the amount of fertilizer affect the height of tomato plants over a 30-day period?

2. Original Non-Testable Question: What makes something sink or float?
- Testable Version: How does changing the density of an object (by altering its material) affect its ability to float in water?

#### 4. Final Answer:

- Testable Questions:
1. How does changing the amount of water affect the growth of tomatoes?
2. How does changing the type of soil affect the growth of petunias?
3. How does changing the amount of sunlight affect the growth of daffodils?
4. How does changing the type of fruit affect its ability to float in water?
5. How does changing the shape of a rocket's fins affect its ability to fly?
6. How does changing the type of water affect its ability to absorb thermal energy from the Sun?
7. How does varying the amount of fertilizer affect the height of tomato plants over a 30-day period?
8. How does changing the density of an object (by altering its material) affect its ability to float in water?

- Non-Testable Questions:
1. How do plants grow?
2. What makes something sink or float?
3. How do rockets work?
4. How does the sun heat up water?

Final Answer Box:

\[
\boxed{
\text{TESTABLE:}
\begin{enumerate}
\item How does changing the amount of water affect the growth of tomatoes?
\item How does changing the type of soil affect the growth of petunias?
\item How does changing the amount of sunlight affect the growth of daffodils?
\item How does changing the type of fruit affect its ability to float in water?
\item How does changing the shape of a rocket's fins affect its ability to fly?
\item How does changing the type of water affect its ability to absorb thermal energy from the Sun?
\item How does varying the amount of fertilizer affect the height of tomato plants over a 30-day period?
\item How does changing the density of an object (by altering its material) affect its ability to float in water?
\end{enumerate}
\text{NON-TESTABLE:}
\begin{enumerate}
\item How do plants grow?
\item What makes something sink or float?
\item How do rockets work?
\item How does the sun heat up water?
\end{enumerate}
}
\]