1.Tyrannosaurus Rex Lived in the Mesozoic Era
2.The largest mass extinction happened in the Paleozoic Era
3.Life exploded for the first time in the Precambrian Era
4.The Chicxulub crater in the Cenozoic Era
The first can be filled with an element and the second blank can be filled with a compound.
Iron is an element as it contains only one kind of atom, which combines with the oxygen from the air to produce rust, that is, iron oxide. The rust comprises two kinds of atoms, which signifies that it is a compound. A compound refers to a molecule that comprises at least two types of atoms. In the case, iron oxide is a compound as it comprises Fe and O atom.
Answer: Soil forms from weathered rocks and organic material.
The rest of the statements are false. First, fertile soil usually forms in plains or lands with lower steepness of slope. Soil in steep slopes are prone to erosion.
The O-horizon is made of material derived from trees (i.e. leaves, pine needles), decomposed materials and humus.
Lastly, more living organisms in an area means more nutrients for the soil.
Answer- True, the tundra is colder than the taiga and higher
Answer: Biodiversity, succession, services
Explanation:
I just had this on a test and got it right
