The decibel level of a sound at the threshold of hearing () is:

The 1906 San Francisco earthquake had a magnitude of 8.3. An earthquake in Colombia was four times as intense. Which expression calculates the magnitude of the Colombia earthquake?

In the exponential growth model , what does ‘r’ represent?

The decibel level B is defined as

Which property of logarithms is used to “bring down the exponent” when solving an exponential equation like ?

How does a vaccine work?  The more you write, the more points you get.

Seeing your older brother talk back to your mother and get his phone taken away for the weekend, you don’t talk back to your mother to avoid having your phone taken away for the weekend. This is an example of

In order to memorize the 50 state capitals, a middle school student changes the lyrics of his favorite song to include all 50 states and their capitals and sings it over and over and over. This annoys his parents, but he (and his parents) soon have them all memorized. This is most clearly an example of

A kindergartner has his favorite toy taken away for 3 days because he talked back to his mother. This behavior (talking back to his mother) decreases in the future. This is an example of

Are there lots of microbes in the world around you, or very few?  Are most of those you come in contact with dangerous?  Tell me about how you might use microbes in your daily life.