Intro to Chemistry & Matter

TRUE or FALSE?

Even though scientific models are simplifications of reality, they are based on observations and experiments so they eventually become natural laws.

• True

• Fasle

True or False?

If a theory is disproved, then all of the observations that support that theory are also disproved.

• True

• False

An explanation that has stood up to much testing and investigation.

• natural law

• theory

• scientific method

• hypothesis

A method of collecting data to evaluate a hypothesis is a(n):

• observation

• scientific method

• measurement

• experiment

A quantitative description that includes a number and a unit is referred to as a(n):

• experiment

• observation

• measurement

• scientific method

A process used by scientists to make and explain discoveries which is also used to solve problems is referred to as a(n):

• observation

• scientific method

• hypothesis

• experiment

A summary of observations that attempts to explain why something occurs is referred to as a(n):

• natural law

• hypothesis

• theory

• observation

A possible explanation for a problem or a question is referred to as a(n):

• observation

• experiment

• natural law

• hypothesis

Noting a measurement or quality of some substance or process is referred to as a(n):

• observation

• experiment

• hypothesis

• scientific method

Which of the following substances is believed to be responsible for the hole in the ozone layer?

• carbon monoxide

• chlorofluorocarbons (CFC's)

• ammonia

• lead