IS Flashcards
Unit 7
Air is a mixture of ____, ____, ____, ____, ____ and other gases.
Air is a mixture of nitrogen, oxygen, carbon dioxide, noble gas , water vapour and other gases.
Unit 7
What is/are the test(s) for oxygen?
i. It relights a glowing splint
ii. It causes a burning splint to burn more brightly.
iii. It cause a glowing splint to burn more brightly.
A. i only
B. i and ii
C. ii and iii
D. i and iii
B
Unit 7
What is/are the test(s) for carbon dioxide?
i. It turns hydrogencarbonate indicator from red to yellow.
ii. It turns hydrogencarbonate indicator from yellow to red.
iii. It turns limewater from colorless to milky.
A. i only
B. ii only
C. i and iii
D. ii and iii
C
Unit 7
What is/are the test(s) for water and water vapour?
i. Both turn dry cobalt chloride paper from pink to blue.
ii. Both turn dry cobalt chloride paper from blue to pink.
iii. There are no simple tests.
A. i and iii
B. ii and iii
C. i only
D. ii only
D
Unit 7
What is/are the test(s) for nitrogen and noble gases?
i. There are no simple tests.
ii. There are too many tests.
iii. There are no tests.
A. i only
B. ii only
C. iii only
D. i, ii, and iii
A
Unit 7
Plants make their own food by ____.
Plants make their own food by photosynthesis.
Unit 7
What is the word equation for photosynthesis?
A. carbon dioxide + glucose -> water + oxygen
B. oxygen + water -> carbon dioxide + glucose
C. carbon dioxide + water -> glucose + oxygen
D. glucose + oxygen -> carbon dioxide + water
C
Unit 7
What is the chemical equation for photosynthesis?
A. 6CO-2 + C-6H-12O-6 -> 6H-2O + 6O-2
B. 6CO-2 + 6O-2 -> 6H-2O + C-6H-12O-6
C. C-6H-12O-6 + 6O-2 -> 6CO-2 + 6H-2O
D. 6CO-2 + 6H-2O -> C-6H-12O-6 + 6O-2
D
carbon dioxide + water -> glucose + oxygen
Unit 7
The iodine solution change from what color to what color when in the presence of starch.
A. brown to blue
B. brown to black-blue
C. blue-black to brown
D. brown to blue-black
D
Unit 7
The following are the steps for testing starch in green leaves. Name the purpose of the step.
1. Put the leaf in the boiling water.
2. Put the leaf in hot alcohol.
3. Wash the leaf in hot water.
4. Add iodine solution to the leaf.
- -> To destroy the cell membrane
- -> To remove the chlorophyll from the leaf
- -> To remove alcohol and make the leaf soft
- -> To test for the presence of starch in the leaf
Unit 7
What is produced during photosynthesis?
A. starch and carbon dioxide
B. starch and oxygen
C. water and carbon dioxide
D. water and oxygen
B
Unit 7
How do you destarch a plant?
By placing it in the dark for at least 48 hours.
Unit 7
How do we test for chlorophyll?
Put iodine solution on a variegated leaf. The green part should be blue-black and the white part should be brown.
Unit 7
How do we test for carbon dioxide?
Put soda lime in one of the bag with a leaf. The one with the soda lime should not have starch while the one without soda lime should have starch.
Unit 7
How do we test for light?
Put a black paper with a hole on the leaf, then put iodine solution. The parts of the leaf not covered by the black paper sould be blue-black, while the parts covered by the black paper should be brown.
