จงตอบใบความรู้ ที่กำหนดให้
 
1.) โลกเป็นดาวเคราะห์ดวงที่เท่าไหร่ในระบบสุริยะจักรวาล.
 
2.) วิทยาศาสตร์สมัยใหม่เชื่อว่าโลกเป็นอย่างไร.

 

3.) โลกมีขนาดเส้นผ่านศูนย์กลางเท่าไหร่.
 
 4.) เขตต่างๆ ของโลกที่สำคัญๆมีกี่เขต อะไรบ้าง.
 
 5.) รังสีอัลตราไวโอเลตจากดวงอาทิตย์เป็นอันตรายอย่างไรกับมนุษย์บนโลก.
 
 
 
 
 
 
 
 
 
เฉลย  
 
ข้อ 1.) ตอบ ดวงที่ 3 ถัดจากดาวพุธ และดาวศุกร์
ข้อ 2.) ตอบ เชื่อว่ามีสิ่งมีชีวิตอาศัยอยู่
ข้อ 3.) ตอบ มีขนาดเส้นผ่านศูนย์กลาง 12,756 กิโลเมตร
ข้อ 4.) ตอบ 3 เขต ได้แก่ เขตร้อน เขตอบอุ่น และเขตหนาว
ข้อ 5.) ตอบ โรคต้อกระจก โรคภูมิแพ้ ผิวหนังที่ได้รับรังสีอัลตราไวโอเลตนาน ๆ อาจเป็นมะเร็งได้

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