Which of the following is a direct observation? a. music may plants grow b. the plant is 22cm on day 23 c. two plants must have died from insects d. the plants will likely grow 2cm per day 2. a new fertilizer is being tested to determine if it will plants grow. each day the researcher gives fertilizer to half the plants and measures the height of all plants. this is an example of which step in the scientific method? a. ask a question b. conduct the experiment c. form a conclusion d. from a hypothesis

The correct answer will be options:

1. option-B

2. option-B

Explanation:

Case I

Making an act of direct observation is a way of collecting information in which the observer observes a natural behavior in its natural environment without making assumptions.

In the given questions, the case of direct observation will be when the height of the plant is measured on 23rd day. Thus, Option-B is the correct answer.

Case II

In the given question, the researcher wants to determine the effect of fertilizer on the growth of the plant so he decides to perform an experiment by giving fertilizers to plants.

This is an act of performing an experiment and thus Option-B is the correct answer.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).