Ques: Answer the following question given this paragraph: Look at the rock layers pictured below ( Figure below ); they show a feature called Hutton's unconformity. The unconformity was discovered by James Hutton in the 1700s. Hutton saw that the lower rock layers are very old. The upper layers are much younger. There are no layers in between the ancient and recent layers. Hutton thought that the intermediate rock layers eroded away before the more recent rock layers were deposited. Q: As per hutton's unconformity, what happened to the intermediate layers of rock? Choices: - they metamorphized - they fused - they expanded - they eroded away A:
Ans: they eroded away

Ques: Answer the following question given this paragraph: Isomers that contain the same number of atoms of each kind but differ in which atoms are bonded to one another are called structural isomers. Isobutane and n-butane are examples of structural isomers. One kind of isomerism consists of two compounds that have the same empirical formula but differ in the number of formula units present in the molecular formula. An example in coordination compounds is two compounds with the empirical formula Pt(NH 3)2Cl2. One is a simple square planar platinum(II) complex, Pt(NH3)2Cl2, and the other is an ionic compound that contains the [Pt(NH 3)4]2+ cation and the [PtCl4]2 anion, [Pt(NH3)4][PtCl4]. As you might expect, these compounds have very different physical and chemical properties. One arrangement of the Cl and NH3 ligands around the platinum ion in the former gives the anticancer drug cisplatin, whereas the other arrangement has no known biomedical applications. Q: What type of isomers contain the same number of atoms of each kind but differ in which atoms are bonded to one another? Choices: - different isomers - unique isomers - constitutional isomers - structural isomers A:
Ans: structural isomers

Ques: Answer the following question given this paragraph: Dogs pant to lose excess body heat. Q: Panting allows dogs to get rid of what? Choices: - fur balls - accumulated toxins - calories - excess body heat A:
Ans: excess body heat

Ques: Answer the following question given this paragraph: Chemical elements and water are constantly recycled in the ecosystem through biogeochemical cycles. Q: Chemical elements and water are constantly recycled in the ecosystem through what? Choices: - geothermal cycles - greenhouse gases - inorganic cycles - biogeochemical cycles A:
Ans:
biogeochemical cycles