An experiment was conducted to investigate photosynthesis. Which variables need to be controlled in this experiment? (There are more than one answer)

Species, age and health of the plants

Volume of water used for the plants

When the leaf from pot X is tested with iodine at the end of the experiment it.... (Choose the best answer -- hint: soda lime absorbs carbon dioxide from the air.)

does not show any change in colour because there is no starch in the leaf.

turns blue-black because there is no starch in the leaf.

turns blue-black because there is starch in the leaf.

does not show any change in colour because there is starch in the leaf.

The image shows a leaf before (left) and after (right) a starch test was done on it. Before the starch test, part of the leaf was covered with some black paper while it was still growing on a live plant. Explain why the results turned out like this. (2 answers)

the part covered by the black paper did not receive light.

starch was not detected at the part covered by the black paper

the part covered by the black paper received more light.

starch was detected at the part covered by the black paper

When a starch test is done on this leaf, no change in colour was observed on the yellow parts of the leaf because... (2 answers)

there is no chlorophyll there for photosynthesis to take place

there is chlorophyll there for photosynthesis to take place

The starch test results of this experiment shows the leaf from plant P turning blue-black while the leaf from plant Q had no changes in colour. Why is this? (2 answers)

Plant Q did not have carbon dioxide to do photosynthesis

There was starch in the leaf from plant P.

There was starch in the leaf from plant Q.

Plant P did not have carbon dioxide to do photosynthesis

If all light from our sun shined at a wavelength of 425 nm, what plant pigment would work the best?

No pigments work well at this wavelength of light

1.4 Photosynthesis Experiments

Authored by Leila Mozahem

Science

8th Grade

NGSS covered

Used 87+ times

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15 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

_ is used to test for the presence of starch -- if starch is present, the colour would turn ___.

Iodine, brown

Iodine, blue-black

Chlorophyll, brown

Chlorophyll, blue-black

FILL IN THE BLANKS QUESTION

1 min • 1 pt

Starch is stored food in plants. The presence of starch in plants means that (a) successfully happened in the plant. (Hint: Name the process)

Tags

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

Presence of carbon dioxide gas

Presence of water

Presence of light

Presence of chlorophyll

Tags

NGSS.MS-LS1-6

MULTIPLE SELECT QUESTION

3 mins • 1 pt

An experiment was conducted to investigate photosynthesis. What are the variables that need to be controlled in this experiment? (There is more than one answer)

Presence of carbon dioxide gas

Presence of water

Presence of light

Presence of hydrogen gas

Presence of chlorophyll

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

Presence of carbon dioxide gas

Presence of water

Presence of light

Presence of chlorophyll

Tags

NGSS.MS-LS1-6

MULTIPLE SELECT QUESTION

3 mins • 1 pt

An experiment was conducted to investigate photosynthesis. Which are the variables that need to be controlled in this experiment? (There are more than one answer)

Presence of carbon monoxide gas

Presence of water

Presence of carbon dioxide gas

Presence of chlorophyll

Amount of light received

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

Presence of carbon dioxide gas

Presence of water

Presence of light

Presence of chlorophyll

Tags

NGSS.MS-LS1-6

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1.4 Photosynthesis Experiments

_ is used to test for the presence of starch -- if starch is present, the colour would turn ___.

Starch is stored food in plants. The presence of starch in plants means that (a) successfully happened in the plant. (Hint: Name the process)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. What are the variables that need to be controlled in this experiment? (There is more than one answer)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. Which are the variables that need to be controlled in this experiment? (There are more than one answer)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. Which variables need to be controlled in this experiment? (There are more than one answer)

Which of the following is true about the part of the leaf that was not covered by black paper when it is tested with iodine at the end of the experiment?

Which of the following is true about the part of the leaf that is green in colour when it is tested with iodine at the end of the experiment?

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1.4 Photosynthesis Experiments

___________ is used to test for the presence of starch -- if starch is present, the colour would turn _____________.

Starch is stored food in plants. The presence of starch in plants means that (a) successfully happened in the plant. (Hint: Name the process)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. What are the variables that need to be controlled in this experiment? (There is more than one answer)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. Which are the variables that need to be controlled in this experiment? (There are more than one answer)

An experiment was conducted to investigate photosynthesis. What is the independent variable of this experiment?

An experiment was conducted to investigate photosynthesis. Which variables need to be controlled in this experiment? (There are more than one answer)

Which of the following is true about the part of the leaf that was not covered by black paper when it is tested with iodine at the end of the experiment?

Which of the following is true about the part of the leaf that is green in colour when it is tested with iodine at the end of the experiment?

Access all questions and much more by creating a free account

Popular Resources on Wayground

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_ is used to test for the presence of starch -- if starch is present, the colour would turn ___.