DLM Science Literacy 3

Question 1

A student wants to test whether music tempo affects plant growth. Which variable should be kept the same throughout the experiment?

Accepted Answer

The amount of water each plant receives

Answer

Controlled variables like water amount must remain constant so that any difference in plant growth can be attributed only to music tempo.

Question 2

Which of the following is an example of qualitative data?

Accepted Answer

The color of a flame during a combustion reaction

Answer

Qualitative data describes characteristics or qualities such as color, texture, or smell rather than numerical measurements.

Question 3

When reading a science article, what is the best way to identify whether the source is reliable?

Accepted Answer

Look for citations, author credentials, and peer review

Answer

Reliable science sources cite their data, are written by credentialed experts, and have been peer-reviewed by other scientists.

Question 4

What is the purpose of repeating an experiment multiple times?

Accepted Answer

To improve reliability and reduce the effect of random errors

Answer

Repeating an experiment increases reliability by showing that results are consistent and not due to a single random event.

Question 5

A hypothesis must be:

Accepted Answer

A testable prediction about the relationship between variables

Answer

A hypothesis is a testable, falsifiable prediction that states the expected relationship between an independent and dependent variable.

(DLM) Dynamic Learning Maps Practice Test