Imprints or impressions of such things as footprints or trails are generally referred to as trace fossils. Body impressions are called mold fossils, and molds that are filled in are called cast fossils.
Fossils of an animal can form in the sand. The fossils do this when the animal dies and decomposes. The fossil forms in the sand after this process.
Trace fossils are things like foot prints, burrows, and fossilized feces (coprolites). So quite simply, they're formed by the living-part of an animal's life (rather than its death, being buried as a body fossil). If there's a muddy bottom and an animal crawls across it, it could leave an imprint. Burrows could left behind. These divots and so on can get filled in with hardy sediment that becomes fossilized when the mud is covered over and the sediments become a standard sedimentary rock containing trace fossils.
A carbocation is formed when a alkane or a alkyl group containing molecule undergoes through a SN1 reaction.
At the stage of development when the gut forms there is only a single opening into the digestive track, this opening may become either the mouth or anus. In the echinoderms, chordates, and hemichordates the blastopore becomes the anus and a new opening forms the mouth, these are called deuterostomes
Polymers are formed from monomers.
an atmosphere containing free oxygen
An imprint fossil is formed when an animal or plant makes a print in the soil. Such as a footprint.
decay
Trace fossils are things like foot prints, burrows, and fossilized feces (coprolites). So quite simply, they're formed by the living-part of an animal's life (rather than its death, being buried as a body fossil). If there's a muddy bottom and an animal crawls across it, it could leave an imprint. Burrows could left behind. These divots and so on can get filled in with hardy sediment that becomes fossilized when the mud is covered over and the sediments become a standard sedimentary rock containing trace fossils.
Trace fossils are formed when an organism leaves a trace; such as a footprint, a bite mark, or even poo.
we were formed by animal waste.
A carbocation is formed when a alkane or a alkyl group containing molecule undergoes through a SN1 reaction.
At the stage of development when the gut forms there is only a single opening into the digestive track, this opening may become either the mouth or anus. In the echinoderms, chordates, and hemichordates the blastopore becomes the anus and a new opening forms the mouth, these are called deuterostomes
rain containing nitric and sulfuric acid
Hemoglobin becomes oxygenated in the lungs.
becomes H30+
No. An acid is a solution containing H+ ions
Pertaining to basalt; formed of, or containing, basalt; as basaltic lava.