Question

summarize it!
drag and drop the words or phrases that accurately complete the paragraphs.

there are three basic types of scientific investigations.

a scientist may choose to perform a/an □ investigation to identify patterns in nature by comparing two or more items or groups. this type of investigation is limited, however, because it is hard to identify direct relationships between groups. also, too many uncontrolled variables outside the investigation may affect results.

a scientist may perform a/an □ investigation to make detailed records of animals or species without interfering with the environment. descriptive investigations may be limited by the scientist’s impressions and the inability to be repeated and replicated by other scientists.

a scientist may perform a/an □ investigation to determine a relationship between two variables. these investigations may be repeated and replicated by other scientists. this type of investigation is limited by human error in measurements and being able to account for all variables.

comparative descriptive experimental

Explanation:

To solve this, we analyze each blank based on the description of the investigation type:

1. The first blank: The description mentions "comparing two or more items or groups" to identify patterns. The word "comparative" fits this as comparative investigations involve comparing groups.
2. The second blank: The description says "make detailed records of animals or species without interfering with the environment" and labels it as "descriptive investigations" in the text. So "descriptive" is the correct term here.
3. The third blank: The description is about "determining a relationship between two variables" and being repeatable. "Experimental" investigations are used to find relationships between variables (like independent and dependent variables).

Filling the Blanks:

• First blank: comparative (matches the action of comparing groups to find patterns).
• Second blank: descriptive (matches the action of recording details without interference, as defined for descriptive investigations).
• Third blank: experimental (matches the action of determining variable relationships, as experimental investigations do).

Answer:

First blank: comparative
Second blank: descriptive
Third blank: experimental