a biology student wants to conduct a study of how much sunlight affects the length of sleep for mice. she sets up four cages with a mouse in each cage. what are the independent variable, dependent variable, and constants?

The correct answer will be options-

1. Indpendent variable: amount of sunlight

2. Dependent variable: sleep of mice

3. Constants: amount of water, temperature, amount of food, size of cage and exercise wheel.

Explanation:

The experiment is designed to find the answers to a question. In the given question the experiment was performed to study the effect of sunlight on the sleep pattern of mice.

The experiment variables in experimental design can be categorized  into three classes:

1. Independent variable: The variable which can be controlled and can be changed easily in an experimental setup like the amount of sunlight can be changed.

2. Dependent variables: The variable which is being studied in an experiment like the sleep of mice.

3. Constants: The variable which is kept constant throughout the experiment but can affect the dependent variable like the amount of water, temperature, amount of food, size of cage and exercise wheel.

Thus, the selected options are the correct answer.

the answer is 0.42 is that is an option. this question provides no info

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.