Unit 1 Reassessment

What is the difference between a theory and hypothesis?

• It's been tested thousands of times by many people with the same results.
• It is backed by tons of research.
• A theory is hard to disprove, but it can be done.
• It is a suggestion about a possible outcome.

As the mass of the copper increases, the volume of the copper increases. This is an example of:

• direct proportion
• inverse proportion
• accuracy
• meniscus

What is the volume of a table sugar sample if the density is 1.59 g/cm^3 and the mass is 2200 grams? (use significant figures)

• 1383.6 cm^3
• 1400 cm^3
• .00072 cm^3
• 72 cm

A student measures a boiling point to be 125.6 degrees Celsius. The teacher tells him the actual boiling point is 128.5 degrees Celsius. What was the percent error? (Use appropriate significant figures)

• 2.257%
• 2%
• 2.31%
• 2.3%

198 g = _______ kg

• .198 kg
• 1980 kg
• 1.98 kg
• 1000 kg

How many seconds are in 16 years?

• 350,400 seconds
• 8,409,600 seconds
• 5.0 X 10^8 seconds
• 504,576,000,000 seconds

List the 4 significant figure rules:

• Middle zeroes are always significant.
• Leading zeroes are never significant.
• Ending zeroes are always significant.
• All non-zero numbers are always significant.

What is the scientific notation for 0.009702?

• 9.702 X 10^3
• 9.7 X 10^3
• 9.702 X 10^-3
• 9702.00

Write 58000000 in scientific notation:

• 5.8 X 10^7
• 5.8 X 10^-7
• 5.8
• .58

(2.77 X 10^8) + (5.34 X 10^7)

• 3.30 X 10^8
• 33 X 10^7
• 8.11 X 10^8
• 8