Iwill mark branliest and 20 points
timmy has decided he wants to test which if music can really flowers grow. he decides to expose some roses to classic music 10 minutes every day. he will have another group of roses that will receive no music and a third group that will get music for 20 minutes per day. timmy makes sure to have the same types of plants in each group and to expose them to music at the same time during the day. he also makes sure that all plants get the same amount of water and sunlight each day. at the end of 2 weeks, timmy measures the height of all the plants to see if the music made a difference. (4 points)
identify the independent variable, dependent variable and at least 2 control variables in this experiment

The correct answer will be-

1. Independent variable- time a plant is exposed to music

2. Dependent variable- the growth of the plant

3. Control variables- the amount of sunlight and water

Explanation:

A scientific experiment contains three types of variables:

1. Independent variable: the variable which can be modified or changed either manually or on its own which influences the other variables of the experiment, therefore, the time a plant is exposed to music is the correct answer.

2. Dependent variable: the variable which is tested in the experiment and influenced by the independent variable, therefore, the growth of the plant is the correct answer.

3. Constant variable: The variable which remains constant throughout the experiment like the amount of water and sunlight provided is kept constant.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.