It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, butcarbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
I would say d.
Answer:
Repetition
Explanation:
The best term to describe this example is repetition and not replication.
Most times, to obtain an accurate and precise reading which is reliable, scientist makes several repeated measurements. The average gives the most reliable representation of the phenomenon being tested.
This process is called repetition.
On the other hand, duplicating an experiment is replication. Experiments are replicated to proof their validity.
- Since this is a brand new experiment where 16 height measurements are reported, we are dealing with a repetition situation.
Hello! Glad to help.
From what I have learned in my ICP class, molecules combine together to form componds. A compound is any molecule that is made up of two or more different elemental atoms.
Hope this helps you! Anymore questions? Just ask.
He is missing a (real) control. Growing two plants without plant food at all doesn't count; in order to see if the new food is better, he must also grow plants with the original food in order to compare it.
He does have an independent variable. This is the type of plant food. It's independent because he has direct control over it.
He needs to give plants the same conditions besides food: same water (amount), same light exposure, same temperature, etc.
He needs to choose a quantitative way to measure how much the plants grew, like mass or length.
