S1 exam

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

In scientific notation, should the power be positive or negative for the number 590760?

Back

Positive

Front

How many minutes are in a school year of 187 days? (24 hrs. in a day)

Back

269,280 min.

Front

How do you calculate the number of minutes in a school year?

Back

Multiply the number of days by 24 hours and then by 60 minutes: 187 days * 24 hrs/day * 60 min/hr.

Front

What is the formula to convert liters to gallons?

Back

Gallons = Liters / 3.79

Front

How many gallons are in a pool that holds 758,000 Liters? (1 gallon = 3.79 Liters)

Back

200,000 gallons

Front

What defines an element in chemistry?

Back

An element is defined by its number of protons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you find the number of neutrons in an isotope?

Back

Subtract the atomic number (protons) from the mass number (total protons + neutrons).

Front

For the isotope 89Kr, how many neutrons does it have?

Back

53 neutrons (89 - 36 = 53).