8. Colleen waters the plants in her greenhouse once every day. She wants to find out if the plants will grow more leaves if they are watered more
often. She counts the number of leaves on each plant before she starts.
She then continues to water half of each type of plant once daily, but she
waters the other half of each type twice a day. What is the outcome
variable in Colleen's experiment? *
the amount of light the plants receive
the number of leaves the plants grow
the number of times the plants are watered
the type of plant being grown
H

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.