Ministry Exam Practice Quiz

From the statements below, choose two which will cause an increase in the salinity of ocean water. 1 - Increased erosion 2 - Ocean water redirected to a tidal energy plant 3 - Pack ice and glacial melt 4 - Water evaporation at the equator

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4

Which location is in the same catchment area?

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 2 and 4 only

Which of the following processes does not cycle carbon dioxide (CO₂) back into the atmosphere?

• Photosynthesis

• Decomposition of waste

• Forest fires

• Volcanic eruptions

Which of the following statements concerning thermohaline circulation is true?

• Thermohaline circulation allows for the heat accumulated in ocean water at the Polar Regions to circulate to the Equatorial Region.

• Thermohaline circulation allows for the heat accumulated in ocean water at the Equatorial Region to circulate to the Polar Regions.

• Thermohaline circulation can be compared to a conveyor belt which moves warm and cold air masses around the Earth.

• Thermohaline circulation can be compared to a conveyor belt which moves warm and cold freshwater systems around the Earth.

Samples of ocean water were collected from different depths and analyzed. Which of the following lists the samples in order of increasing salinity?

• C - A - B

• A - B - C

• C - B - A

• B - A - C

Oxygen forms an O²⁻ ion. Which of the following statements is correct?

• The oxygen atom loses 2 protons to form its ion.

• The oxygen atom loses 2 electrons to form its ion.

• The oxygen atom gains 2 electrons to form its ion.

• Oxygen neither gains nor loses electrons when forming its ion.

Which of the following is NOT an example of rapid combustion?

• A log fire

• A candle burning

• Digestion

• A gas stove element burning

Wasp stings are alkaline. Which substance would help relieve this injury?

• Vinegar

• Toothpaste

• Tap water

• Ammonia-based window cleaner

What mass of ammonia (NH₃) is produced when 6 g of hydrogen gas (H₂) combines with 28 g of nitrogen gas (N₂)?

• 6 g

• 23 g

• 34 g

• 46 g

The following model represents a balanced equation for a reaction involving a piece of magnesium metal and hydrochloric acid.

• Mg + HCl → H₂ + MgCl₂

• Mg + H₂Cl₂ → H₂ + MgCl₂

• Mg + 2 HCl → H₂ + MgCl₂

• Mg + H₂Cl₂ → H₂ + 2 MgCl₂