IMG0940
.png
School
Bend Senior High School**We aren't endorsed by this school
Course
BIO IDK
Subject
Chemistry
Date
Dec 18, 2024
Pages
1
Uploaded by ConstableTankManatee34
Get the Gizmo ready: E Activity C: « Click Reset. = S = The carbon-oxygen | ¢ Clearall of the test tubes. % ¢ balance e Tumn the light switch to on. ] Y “ @5 i e Check Show oxygen and CO; values. AR A AN Question: How are the amounts of oxygen and carbon dioxide related to each other? 1. Observe: Put two Elodea sprigs into a test tube. Put the O2/CO2 probe into the tube with the Elodea. Click Play. As the Gizmo runs, Pause ('_'}) it a few times. A. How do the oxygen (O2) and carbon dioxide (CO:) levels change over time? [)Z e W ohle CO, oo o B. What is always true about the total amount of Oz and CO: in the test tube? oz =6 60 é) C. What happens when the CO; reaches zero? D._u(, e t Ol =11 2. Revise and repeat: Click Reset and run the experiment again, this time with the lights off. A. How do th levels ch ? 0 [ef0) ow do the gas levels change? O, _a,&wn 2 U\\’ B. What is the total of O, and CO,? 02 -,‘Z 6 an =4. 0 3. Revise and repeat: Click Reset. Remove the plants. Repeat the experiment with two snails. A. How do the gas levels change? O _D_afw\ CO2 B. What is the total of Oz and CO,? 0‘7:‘ [.7 (01'" ’03 4. Challenge: In the process of photosynthesis, plants use carbon dioxide (CO2), water (H20), and light energy to produce a sugar (CsH120s) and oxygen (O2). In the process of aerobic respiration, animals and plants release energy from sugar and oxygen and produce carbon dioxide and water. The chemical equations that describe these reactions look like this: 6CO; + 6H20 + light > CsH1206 + 60- CsH1206 + 60, - 6CO- + 6H.0 + energy How do these equations explain why the total amount of O, and CO2 remains the same? c;),@blg«m erdn dhr wt
