6. fossils are remains of organisms found in sedimentary rock. these remains are found in thousands of rock layers around the world and provide evidence for earth's long history of changing lifeforms.

rock layers that formed more recently
contain fossils of animals only.

contain fossils of plants only.

contain fossils that resemble existing species less closely than do fossils found in older rock layers.

contain fossils that resemble existing species more closely than do fossils found in older rock layers.

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.