Question 1: Which of the following best defines density?

Answer: Mass per unit volume

Question 2: True or False: Increasing the volume of a substance always increases its density.

Answer: False

Question 3: True or False: Pressure is defined as force applied over a certain area.

Answer: True

Question 4: Explain what happens to the pressure inside a sealed container when the temperature increases.

Answer: The pressure increases because the particles move faster and collide more frequently with the walls of the container.

Question 5: What is the formula for calculating pressure?

Answer: Pressure = Force / Area

Question 6: Calculate the density of a substance that has a mass of 250g and a volume of 50cm³.

Answer: Density = 5g/cm³

Question 7: Match the following terms to their definitions:

Answer: See full answer key

Question 8: Order the processes involved in measuring the density of a liquid:

Answer: See full answer key

Question 9: Fill in the blank: The pressure exerted by a fluid at a certain depth depends on the fluid's ______.

Answer: density

Question 10: Discuss how atmospheric pressure changes with altitude and the implications for human activity at high altitudes.

Answer: At higher altitudes, atmospheric pressure decreases because there is less air above to exert pressure. This can result in difficulty breathing due to lower oxygen availability, affects cooking times, and has implications for physical performance and aviation.