Which type of flame is used for beating in the lab? non-luminous is a Solid substance that dissolve in a liquid Which was the most suitable apparatus that they were suppose to use?

Here are the answers to your questions:

7.a) Science is important in addressing the health issue in the following ways:

• It helps in identifying the cause of the disease outbreak (e.g., specific pathogen, contaminated water source).
• It provides methods for prevention and treatment, such as water purification techniques (e.g., chlorination, filtration) and developing vaccines or medicines.

7.b) Two career opportunities related to science that would be involved in solving this community's problem are:

• Public Health Officer/Epidemiologist: To investigate the outbreak, track its spread, and implement public health interventions.
• Microbiologist: To identify the specific microorganisms causing the disease and understand their characteristics.

8) Two scientific methods that can be used to purify water for drinking are:

• Boiling: Heating water to a high temperature to kill most pathogens.
• Filtration: Passing water through a filter to remove suspended particles and some microorganisms.

9) The type of flame used for heating in the lab is a non-luminous flame.

10) A solute is a solid substance that dissolves in a liquid.

11) The most suitable apparatus for Grade 2 learners to determine the volume of a stone is a measuring cylinder (using the water displacement method).