Chapter 1 & 2 Science and Matter

The main branches of natural science are 

• physics and chemicstry
• biology, zoology, and ecology
• medicine and agriculture
• life, physical and Earth science

Scientist test a hypothesis by

• forming questions
• designing models
• doing experiments
• drawing conclusions

A scientific law is

• the same as a hypothesis.
• a description of a natural event.
• an explanation of a scientific observation.
• the conclusion of a scientific experiment

A tool used by physicists to smash atoms is a 

• spectroscope
• stopwatch
• particle accelerator
• radio telescope

A measurement that is accurate is one that 

• is as exact as possible
• is close to the true value
• contains at least four significant figures
• contains five decimal places

Maria is 123 centimeters tall.  He height in meters is 

• 0.0123 m
• 0.123 m
• 1.23 m 
• 12.3 m

A loaf of bread weighs 1,362 g.  The weight in kilograms is 

• 1.362 kg
• 1,362 kg
• 0.1362 kg
• 0.01362 kg

You are asked to find the volume of a cube that is 2.5 cm high, 2.65 cm high, 2.65 cm wide, and 3.456 cm long.  How many significant figures should you show in your answer?

• 1
• 2
• 3
• 4

A mathematical representation of an object is a 

• concept map
• derived unit
• variable
• model

A substance that cannot be broken down into simpler substances is called a

• compound 
• mixture
• element
• atom