What instrument do you need to see bacteria?
A microscope.
Are bacteria staying still or moving?
They are moving (wiggling and swimming).
What shape are most of these bacteria?
They look like tiny dots or short rods.
Do the bacteria all move in the same direction?
No, they move in many different directions.
If you look at the water without a microscope, would you see them?
No, they are invisible to the naked eye.
What type of microbe is yeast?
It is a fungus.
What is the yeast "eating" in the bread dough?
It eats sugar or flour.
What does the yeast create as it eats?
It creates air bubbles (gas).
Why does the bread get bigger?
Because the air bubbles grow inside the dough.
Does yeast grow quickly or slowly when it's warm?
It grows quickly when it is warm.
Is yeast helpful or harmful to humans in this video?
It is helpful because it makes our food.
Is yeast a "global traveler" found in many countries?
Yes, people everywhere use yeast to make bread.
What is "spreading"?
It is when microbes move from one person or place to another.
Can microbes travel between different countries? How?
Yes, they travel with people on planes, ships, and buses.
What happens when you sneeze without covering your mouth?
Microbes fly into the air for other people to breathe.
How do microbes move from your hand to a door handle?
Through touch.
