30 Questions
Which of the following is a by-product of photosynthesis?
Oxygen
What are the raw materials for photosynthesis?
Carbon dioxide and water
What is the energy source for photosynthesis?
Light
What is the food produced during photosynthesis?
Glucose
What do plants use glucose for?
Growth and respiration
What is the function of chlorophyll in photosynthesis?
Absorbing light energy
Which of the following is NOT a necessary factor for photosynthesis?
Starch
What is the purpose of destarching a plant before investigating the necessary factors for photosynthesis?
To ensure that the leaves do not contain any starch
What is the role of alcohol in the experiment?
To remove the chlorophyll from the leaf
What happens to the glowing splint when placed over the mouth of the plastic bottle?
It relights
What is the color of the leaf after adding iodine solution?
Blue-black
What do bubbles in water indicate during the experiment?
Presence of oxygen
According to the text, which of the following statements about photosynthesis is true?
Photosynthesis is important for maintaining the balance of oxygen and carbon dioxide in nature
Based on the text, what would happen if all plants on the island died?
Only the animals that feed on plants would die
In a food chain, which of the following is true?
Plants are producers and animals are consumers
Based on the text, what is the ultimate source of energy for all food chains?
The Sun
According to the text, what is the significance of photosynthesis?
Providing food for living things
Based on the text, which of the following is an example of a food chain?
Grasshopper, grass, bird
Which variable is the only variable that is changed in an experiment?
Independent variable
What is the purpose of destarching a plant before conducting investigations about the factors necessary for photosynthesis?
To ensure that the plant does not have any starch at the beginning of the investigation
Which statement about carbon dioxide and photosynthesis is true?
Carbon dioxide is a necessary factor for photosynthesis
What is the correct order of steps for testing for starch in a green leaf?
(a) Put the leaf in hot alcohol, (b) Put the leaf in boiling water, (c) Add iodine solution to the leaf, (d) Wash the leaf in hot water
Which variable is measured in an experiment and is affected by the independent variable?
Dependent variable
What is the purpose of destarching a plant before conducting investigations about the factors necessary for photosynthesis?
To ensure that the plant does not have any starch at the beginning of the investigation
Which of the following is a true statement about photosynthesis?
Carbon dioxide is needed for photosynthesis.
Which of the following statements about photosynthesis are correct?
Photosynthesis converts light energy into chemical energy.
What is the chemical equation for photosynthesis?
6CO2 + 6H2O -> C6H12O6 + 6O2
How can we confirm that photosynthesis has taken place in a plant?
By observing the color change of iodine solution
What is the purpose of boiling the leaf in alcohol during the starch testing experiment?
To remove the chlorophyll from the leaf
What is the purpose of the control set-up in the iodine test for starch?
To provide a reference for the color change of iodine solution
Test your knowledge on the effects of heating alcohol and its use in an experiment with this quiz. Discover what happens to the colors of alcohol and a leaf when heated, and understand the purpose of using alcohol in this experiment. Challenge yourself to complete the steps correctly and learn about the effects of alcohol removal on a leaf.
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