Photosynthesis and Starch Detection

Photosynthesis and Starch Detection

Assessment

Interactive Video

Biology, Science

6th - 8th Grade

Medium

Created by

Aiden Montgomery

Used 1+ times

FREE Resource

The video tutorial explains the process of photosynthesis and how plants produce glucose and oxygen. It guides viewers through an experiment to detect starch in plant leaves. The necessary materials include a Bunsen burner, ethanol, and iodine solution. The experiment involves boiling a leaf, decolorizing it with ethanol, and testing it with iodine. The leaf turns blue-black, indicating the presence of starch. This experiment demonstrates the role of sunlight in starch formation in leaves.

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9 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main products of photosynthesis?

Glucose and carbon dioxide

Starch and oxygen

Glucose and oxygen

Oxygen and water

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT required for the starch detection experiment?

Bunsen burner

Tripod stand

Petri dish

Thermometer

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to select a leaf that has been exposed to sunlight?

Sunlight makes the leaf more permeable

Sunlight is necessary for starch formation

Sunlight helps in the formation of chlorophyll

Sunlight decolorizes the leaf

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of boiling the leaf in water?

To remove chlorophyll

To soften the leaf tissues

To break cell membranes and walls

To decolorize the leaf

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role does ethanol play in the experiment?

It decolorizes the leaf

It softens the leaf tissues

It breaks cell membranes

It acts as an indicator

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the leaf placed back in hot water after ethanol treatment?

To remove any remaining chlorophyll

To soften the leaf tissues

To make the leaf more permeable

To prepare the leaf for iodine application

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of adding iodine to the leaf?

To indicate the presence of starch

To soften the leaf tissues

To decolorize the leaf

To break cell membranes

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What color change indicates the presence of starch in the leaf?

Yellow to green

Blue to red

Colorless to blue-black

Green to yellow

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What conclusion can be drawn if the leaf turns blue-black after iodine application?

The leaf contains chlorophyll

The leaf is permeable

The leaf contains starch

The leaf is decolorized