Question 2 age 1: Previous Page Next Page Page 2 of s Note: It is recommended th

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Question 2 age 1: Previous Page Next Page Page 2 of s Note: It is recommended that you save your response as you complete each question Page 2: 1.2 chem phys props 2 Question 2 (1 point) Page 3: Which of the following statements are correct with regard to the chemical compositions of the Earth's crust and the human body? The Earth's crust is made of completely different chemical substances than is the human body Page 4 Both have high concentrations of carbon Both have high proportions of oxygen Page S substances that are rare in Earth's crust are cornmon the human body, and vice vers Save Legend Previous Next Page Page 2 of s Saved Respo Unsaved Response Info Item Go to Submit Quiz

Explanation / Answer

The rocky surface layer of Earth, called the crust, is made up of mostly oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium. Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.

Hence option a cann't be true since there are many common substance in both.

Option b is not true since only 18 % carbon by weight is in human body and 0.18 % carbon in earth's crust.

Option c is true since earth curst has 46.1 % of oxygen and human body has 65 % .

Option d is not true since generally human body contains the substances which are in earth's curst.

I will be glad to see your comment if you have any query and thum up if you are satisfied. Thanks...

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