The Gardener’s Plant Investigation

What was the gardener’s independent variable?🌱

• Height of plants

• Width of leaves

Answer explanation

💡 Explanation:
IV = the variable that is changed.
Here, the gardener selected plants of different heights to study.
➡️ IV = Plant height (what is changed)

What was the dependent variable (DV)?🍃

• Width of the leaf

• Height of the plant

Answer explanation

💡 Explanation:
DV = what is observed or measured.
The gardener measured the width of the leaves.
➡️ DV = Leaf width (what is observed)

Which is the best research question for this investigation?❓

• Why are plants green?

• How does height of plants affect width of leaves?

Answer explanation

💡 Explanation:
A good research question connects the IV and DV.

🧠 “How does IV affect DV?”
➡️ “How does plant height (IV) affect leaf width (DV)?

Which of these is a suitable hypothesis? 💭

• Bigger plants grow faster.

• If a plant height increases, width of leaves increases.

Answer explanation

💡 Explanation:
A hypothesis is a prediction based on your IV and DV.

🧠 Format: “If IV increases , then DV will increase.”
➡️ “If plant height increases, then leaf width will increase

What tool should the gardener use to measure leaf width? 🧰

• Ruler 📏

• Stopwatch ⏱️

Answer explanation

💡 Explanation:

Leaf width is a length, so a ruler or tape is used.

✅ Use a ruler to measure in cm.

What is wrong with this data table? 🧾

• No units in header column

• inconsistent decimal place

• There’s too much data

• The numbers are too small

Best title for the graph based on this data?📊

• Gardening Results

• Leaf Growth

• Relationship between Plant Height and Leaf Width

• Width of leaf vs height of plant

Answer explanation

💡 Explanation:

Graph titles must include both variables.

🧠 Format: " IV vs DV

Which axis should show the plant height (IV)?📈

• X-axis

• Y-axis

Answer explanation

💡 Explanation:

Always place the IV on the X-axis and DV on the Y-axis.

🧠 X = what you change | Y = what you observe

Which axis should show the width of leaf (DV)?📈

• X-axis

• Y-axis

Answer explanation

💡 Explanation:

Always place the IV on the X-axis and DV on the Y-axis.

🧠 X = what you change | Y = what you observe

What pattern does the graph show?

hint (positive linear relationship)

• The graph goes in a zigzag

• As plant height increases, leaf width increases

Answer explanation

The graph indicates a positive linear relationship where as plant height increases, leaf width also increases, supporting the choice that states 'As plant height increases, leaf width increases'.