![queenbee2994](/avatars/20129.jpg)
queenbee2994
21.08.2021 •
Biology
Question 1
One of the end products of respiration is carbon dioxide, or CO2. In this activity, you’ll measure the amount of CO2 yeast produces when it is fermented in five different cups with the following contents:
Cup A: yeast and lukewarm water
Cup B: yeast, sugar, and lukewarm water
Cup C: yeast, sugar, and hot water
Cup D: yeast, sugar, and cold water
Cup E: yeast, sugar, and lukewarm water (covered with plastic wrap)
You’ll use a ruler to measure the amount of CO2, or foam, that forms in each cup. Do you think the amount of foam in the cups will differ? Write down your prediction.
Question 2
To prepare for the experiment, follow these steps:
Put one or two ice cubes in 1 cup of water. Chill the cup of water in the refrigerator for 1 to 2 hours. Remove any remaining ice when you take the water out of the refrigerator. This cup holds the ice-cold water.
Heat up three cups of water in the microwave for 15 to 20 seconds until they reach 100°F on the thermometer. If you heat the water too much, wait until the temperature drops to 100°F. These cups hold the lukewarm water.
Heat the last cup of water in the microwave until it reaches 212°F. This cup holds the boiling water.
Now line up the five glasses and label them A, B, C, D, and E. Then put the following contents in each glass:
Glass Contents
A 1 cup lukewarm water
B 1 cup lukewarm water and 1 tablespoon sugar
C 1 cup boiling water and 1 tablespoon sugar
D 1 cup ice-cold water and 1 tablespoon sugar
E 1 cup lukewarm water and 1 tablespoon sugar (this one will be covered with plastic wrap)
Use the spoon to stir the contents in glasses B, C, D, and E until the sugar dissolves. Then immediately add a packet of yeast to each glass. Wash the spoon and stir in the yeast. Cover the top of glass E tightly with plastic wrap.
Wait 15 minutes. Then measure the foam level in each glass in centimeters, as shown in the image.
glass of water containing yeast with foam on the top
Take measurements of the foam level every 15 minutes for 60 minutes. Record your measurements in the table.
Part B: Analyze and Extend
Question 1
How did your results match your predictions?
Solved
Show answers
More tips
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- P Philosophy How to Develop Extrasensory Abilities?...
- S Style and Beauty Don t Sacrifice Your Brows: How to Properly Pluck Stubborn Hairs...
Answers on questions: Biology
- B Biology Which skin-color-associated, pigment-producing cell is located in the labeled layer d?...
- B Biology The atoms found in carbohydrates are usually found in a 1:2:1 ratio (C1H2O1). What does this mean?...
- B Biology In Drosophila, production of eye color pigment requires a functional protein encoded by the white locus. Individuals with two copies of the w allele lack any eye color pigment;...
- B Biology Which event is the best example of competition between species in a pond? A) dragonflies landing on lily pads B) lizards and snakes lying in the sun C) hawks eating mice...
- B Biology 5. Describe what really causes the effect that people call sucking? (Remember that pressure is just a number, not a cause. Temperature is also a measurement.) plz help lol...
- B Biology Use the drop-down menu to answer each question. Where do scientists find pollen grains to study ancient climate change? What attribute of the pollen grains helps scientists...
- B Biology The lipid that covers the epidermal cells of a leaf is called...
- B Biology Drag each label to the correct location on the table. classify each planet as an inner planet or an outer planet....
- B Biology Explain how hormones recognize their target cells...
- B Biology Why do the girls join Abby in the condemnation of Salem’s women?...
Ответ:
A Carries urine to the bladder
B excretes urine out of the body
C stores urine temporarily
D produce urine
Explanation: