Biology
Where does most of digestion take place?
A) Large intestine
B) Small intestine
C) Stomach
D) Liver
B) Small intestine
When a sample of magnesium metal reacts with a sample of hydrochloric acid in a test tube, the surrounding temperature increases from 20°C to 45°C. Based on this information, what type of reaction is taking place?
Exothermic reaction
What is the difference between scalar and vector quantities in describing motion?
Scalar quantities have magnitude only, while vector quantities have both magnitude and direction.
Simon is taking part in a 70 km cycle race. Estimate how far Simon has yet to cycle when he has completed 30% of the race.
49 km
Which organ is not included in the process of the reflex arc?
A) Receptors
B) Brain
C) Motor neurons
D) Spinal cord
B
The iodine test is commonly used to determine the presence of starch in a substance. If starch is detected, what color does the solution turn?
Blue/black
A book with a mass of 2 kg is placed on a shelf 300 centimeters above the ground. Calculate its gravitational potential energy. The formula for gravitational potential energy is PE = mgh. Take g = 10 m/s^2.
60J
Gopal goes to a convenience store. The apple juice costs 10 rupees and the orange juice costs 15 rupees. Gopal buys 2 more packets of orange juice than the amount of apple juice he has bought. If Gopal paid 80 rupees for his packets of orange juice and apple juice, how much of each did he buy?
Apple juice = 2
Orange juice = 4
While conducting experiments, the terms "In vivo" and "In vitro" are used to describe the experiment. What is the meaning of these 2 terms?
In vivo: Experiments conducted within a living organism
In vitro: Experiments conducted outside a living organism
Certain metals burn with a colored flame. What color is the flame when Calcium metal is burnt?
Red-Orange
What phenomenon explains the change in pitch of a siren as an ambulance moves towards and then away from you?
Doppler Effect
A point is chosen at random from within a circle. What is the probability that the point is closer to the center of the circle than it is to the circumference of the circle?
1/4 or 25%