Diagnostic Science Pre-Assessment

Front

What is the concentration of HCl at 70°C according to the data provided?

Back

51.5 g/100g H2O

Front

Which substance's concentration-temperature relationship is represented by the graph?

Back

HCl

Front

What distinguishes Pluto from asteroids and comets?

Back

Pluto is pulled into a spherical shape by its own gravitational force.

Front

What does the passage say about the quantity of plant fossils in Salt pan A compared to Salt pan D?

Back

The passage does not include data regarding the quantity of plant fossils found in the salt pans.

Front

What type of bacteria reproduces best at 55°C and does not grow above 65°C?

Back

Thermophile

Front

Define 'thermophile'.

Back

A microorganism that thrives at relatively high temperatures, typically above 45°C.

Front

What is the significance of concentration in solutions?

Back

Concentration indicates the amount of solute present in a given volume of solvent, affecting the solution's properties.

Front

How does temperature affect the solubility of substances like HCl?

Back

Generally, as temperature increases, the solubility of solids in liquids increases, while the solubility of gases decreases.

Front

What is the role of gravitational force in shaping celestial bodies like Pluto?

Back

Gravitational force pulls matter into a spherical shape, which is a characteristic of larger celestial bodies.

Front

What is a psychrophile?

Back

A microorganism that thrives at low temperatures, typically below 15°C.