PS 2nd Sem Final Review

A scientific theory is a(n) __________________ of certain events.

• description

• explanation

• indisputable fact

• guess

A scientific law is a(n) ________________ of certain events.

• explanation

• indisputable fact

• guess

• description

Using the enlarged metric ruler segment shown below, what is the length of the red line in centimeters?

• 2.20 cm

• 1.89 cm

• 3.20 cm

• 3.49 cm

The same or similar results in successive measurements is a feature of which measure?

• accuracy

• precision

• variability

• none of the options are correct

The actual temperature of a room is 40 degrees Celsius. The tested temperature in degrees Celsius is 37.1,37.2, 37.3, and 37.5 respectively. This distribution shows:

• High accuracy

• High precision

• High variability

• None of the choices are correct

From the graph below, determine the pressure at 120 K.

• 50

• 60

• 40

• 30

Which of the following is NOT a physical property of a substance?

• hardness

• solubility

• color

• reactivity with oxygen

Which of the following is NOT an element?

• carbon

• water

• copper

• chlorine

Which of the following is NOT a compound?

• water - H2O

• carbon dioxide - CO2

• sulfur - S8

• sodium chloride - NaCl

Which of the following is a mixture?

• air

• iron

• hydrogen

• nickel