The organ responsible for producing bile is:
A. Stomach
B. Pancreas
C. Kidney
D. Liver
The Earth’s atmosphere is mainly composed of:
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
The process of plants making their own food is called:
A. Respiration
B. Photosynthesis
C. Transpiration
D. Digestion
Which vitamin is essential for blood clotting?
A. Vitamin A
B. Vitamin C
C. Vitamin K
D. Vitamin D
The process of converting a solid directly into gas is called:
A. Melting
B. Freezing
C. Condensation
D. Sublimation
Which planet is called the Morning Star or Evening Star?
A. Mars
B. Jupiter
C. Venus
D. Mercury
The main component of the Earth’s core is:
A. Aluminum
B. Iron and Nickel
C. Magnesium
D. Silicon
The largest bone in the human body is:
A. Humerus
B. Radius
C. Femur
D. Tibia
The layer of Earth where weather occurs is:
A. Stratosphere
B. Thermosphere
C. Troposphere
D. Mesosphere
Which gas is essential for respiration in humans?
A. Carbon dioxide
B. Hydrogen
C. Oxygen
D. Nitrogen