Exploring Yeast Life in the Lab

What is the first step in the Yeast Alive Lab?

• Add sugar cubes to the test tubes

• Fill the test tubes with warm water

• Add yeast to the test tubes

• Seal the test tubes with balloons

To which test tubes are sugar cubes added?

• Only test tubes three and four

• None of the test tubes

• All four test tubes

• Only test tubes one and two

How many scoops of yeast are added to each test tube?

• Four scoops

• Three scoops

• Two scoops

• One scoop

What is the purpose of placing balloons over the test tubes?

• To seal the test tubes and observe gas production

• To mix the contents

• To keep the test tubes warm

• To prevent evaporation

What should be included in the zero-minute observation?

• Neither a drawing nor a description

• A description only

• Both a drawing and a description

• A drawing only

At what time intervals are observations made during the time-lapse?

• Every 2 minutes

• Every 5 minutes

• Every 10 minutes

• Every 15 minutes

What is observed at the 5-minute mark?

• The inflation of the balloons

• The size of the sugar cubes

• The color of the water

• The temperature of the water

What is the main observation at the 10-minute mark?

• The inflation of the balloons

• The color change in the yeast

• The dissolution of the sugar cubes

• The water level in the test tubes

What should be done at the 20-minute mark?

• Take another observation

• Add more yeast

• Add more sugar cubes

• Remove the balloons

What is the final step after the 25-minute observation?

• Shake the test tubes again

• Add more water

• Finish observations and do analysis

• Remove the test tubes

Tags

NGSS.MS-PS1-2