If we guide ourselves with the Moh´s scale:
Material scratches apatite → material is harder than 5.
Material is scratched by corundum → material is softer than 9.
Conclusion:
The hardness of the unknown material stands between 5 and 9.
Note:
Both apatite and corundum are defining materials (reference materials in the Moh´s scale). So, you can also give an answer using defining materials:
"It can either be an orthoclase feldspar, a quartz or a topaz".
Hope it helped,
BiologiaMagister
<u><em>This answer is dedicated to JaySL</em></u>
<h3>ANSWER.》 A Punnett square determines all of the ways in which alleles can combine. It may be used to predict ratios of offspring genotypes and phenotypes. Punnett squares cannot determine actual outcomes.</h3>
Answer:
Water purification, process by which undesired chemical compounds, organic and inorganic materials, and biological contaminants are removed from water. Water purification provides clean drinking water and supplies treated water for domestic, industrial, medical, and pharmacological uses.
Explanation:
searched online
It is B. Light because the moon shines when it reflects light from the sun. Many people believe that there is no gravity on the moon, but like every other large object in the universe, it attracts other massive objects gravitationally.
Hope this helped
Answer:
C.)exponential
Explanation:
The world's human population is growing at an <u>exponential </u>rate. Humans have increased the world's carrying capacity through migration, agriculture, medical advances, and communication. The age structure of a population allows us to predict population growth.
