When two atoms of different elements come in contact, heat is given off and light is produced. which of the following does this support?

a. the law of definite proportions
b. the law of conservation of energy
c. dalton's atomic theory
d. the law of conservation of matter

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

This is the process of making a prediction based on the results of prior observations of similar events.