Explanation

• Solar power is a renewable energy source that generates electricity from sunlight.
• It does not emit carbon dioxide (CO2) or any other greenhouse gases.

The sources of carbon dioxide emissions:

• Burning of fossil fuels (such as coal, oil, and natural gas) releases CO2 into the atmosphere.
• Burning wood (such as in fireplaces or woodstoves) also releases CO2.
• Respiration (the process by which living organisms breathe) releases CO2 as a byproduct.
• Car exhaust smoke (from internal combustion engines) contains CO2, as well as other pollutants.

Explanation

• Small Vacuole because plant cells typically have a large central vacuole, not small vacuoles.

The components of a plant cell:

• Cell wall
• Cell membrane
• Cytoplasm
• Large vacuole
• Nucleus
• Chromosomes
• Chloroplast

Explanation

• An electric motor converts electrical energy into mechanical energy, producing motion or rotation.
• It uses electromagnetic forces to generate torque, which drives a shaft or other mechanical components.

Explanation

When light strikes an opaque object, the light is blocked, thus a Shadow is formed on the opposite side of the object.

Explanation

• Diffusion is the random movement of particles from a region of higher concentration to a region of lower concentration, resulting in uniform distribution.
• In this case, the ink particles spread out and mix with the water particles, causing the color to disperse throughout the glass.

Explanation

• Cholera is a waterborne disease caused by the bacterium Vibrio cholerae, which is typically found in contaminated water sources.
• If a child has cholera, it indicates that they have ingested contaminated water.
• It addressing water pollution is crucial to prevent further spread of the disease.

Water pollution can cause:

• Waterborne diseases (cholera, typhoid, diarrhea)
• Death of aquatic life (fishes, animals, plants)
• Health problems (immune depression, reproductive failure, acute poisoning)

Explanation

• Hypogeal germination occurs in monocotyledonous seeds (Monocot Seed).
• Where the cotyledon remains underground and the plumule emerges above the soil surface.
• Examples of monocot seeds include maize, wheat, rice, and grasses.

Explanation

• Plants are multicellular, composed of many cells that work together to form roots, stems, leaves, and other structures.
• They have modified cell wall and nucleus.
• They have chlorophyll.
• Algae are unicellular with proper cell wall and nucleus.
• It contain chlorophyll.
• It causes diseases: Cutleria, Ulva and Volvox.

Explanation

• A thermal conductor is a material that allows heat energy to flow through it easily.
• Such as metals like copper, aluminum, and iron.

Explanation

• Clinical thermometers, also known as medical thermometers.
• It typically have a narrow range of 35°C to 42°C.
• Which covers the normal body temperature range of humans (37°C ± 2°C).
• This allows for accurate measurements of body temperature in medical settings.