Ques No.1: The innermost part of bones contains what?
Ans: Bone marrow
Ques No.2: Mercury is extracted from __________.
Ques No.3: What is the human body's biggest organ?
Ans: The skin
Ques No.4: __________ makes the blood look red.
Ques No.5: What substance are nails made of?
Ques No.6: Steel is more elastic than rubber because ___________.
Ans: ratio of stress to strain is more
Ques No.7: True or false? The two chambers at the bottom of your heart are called ventricles.
Ques No.8: Sodium benzoate is used ____________.
Ans: for preservation of food grains
Ques No.9: The muscles found in the front of your thighs are known as what?
Ques No.10: The first _________ in Pakistan was established at Karachi.
Ans: Nuclear power plant