Algae is not an abiotic factor.
Answer:

Explanation
Density can be found by dividing the mass by the volume.

We know the iron sheet has a mass of 28.5 grams and the volume is 3.60 milliliters.

Substitute the values into the formula.

Divide.

Let's round to the nearest thousandth.
The 6 in the ten-thousandth tells us to round the 6 to a 7.

The density of iron is about <u>7.917 grams per milliliter.</u>
Glucose and oxygen are changed into energy and carbon dioxide during cellular respiration and that’s how carbon dioxide is released in the air.
The answer is: D.unstable nuclei emitting high-energy particles as they formed more stable compositions.
Those high-energy particles are alpha particles
, beta particles
, gamma radiation.
For example, the decay chain of ²³⁸U is called the uranium series.
Decay start with U-238 and ends with Pb-206. There are several alpha and beta minus decays.
Antoine Henri Becquerel (1852 – 1908) was a French physicist and the first person to discover evidence of radioactivity.
Becquerel wrapped fluorescing crystal (uranium salt potassium uranyl sulfate) in a cloth, along with the photographic plate and a copper Maltese cross.
Several days later, he discovered that a image of the cross appeared on the plate.
The uranium salt was emitting radiation.
Because of this discovery, Becquerel won a Nobel Prize for Physics in 1903, which he shared with Marie Curie and Pierre Curie.