Explanation

• Quantitative observation involves the use of instruments, tools, or equipment to measure and collect numerical data about the world.
• This approach focuses on quantifying properties, such as length, mass, temperature, or time, to describe phenomena accurately.

Examples of equipment used in quantitative observation include:

• Thermometers
• Spectrophotometers
• Microscopes
• Telescopes
• Stopwatches
• Balances

Explanation

Microscopes are instruments designed to produce magnified visual images of small objects or samples.

It allowing us to see details that are not visible to the naked eye.

Explanation

Homologous structures are those that have different functions (physiology) but share similar internal architecture or morphology, indicating a common evolutionary origin.

Examples include:

• Forelimbs of vertebrates (e.g., human arms, bird wings, whale flippers)
• Pelvic bones of different mammals

Explanation

The gravitational force between two objects is independent of the medium between them.

Gravity acts through a vacuum just as it does through a medium like air, water, or solid objects.

The presence or absence of a medium does not affect the gravitational force between the objects.

Explanation

The weight of a body is the force exerted on it by gravity.

It depends on the gravitational pull of the planet or moon it is on.

Since the gravitational pull varies from place to place (it is stronger near the surface of the Earth than on a mountain, and weaker on the Moon than on the Earth), the weight of a body also varies.

Explanation

• The light-dependent reactions (also known as the Hill reaction) occur in the thylakoid membranes of the chloroplast.
• Thylakoids are specialized membranous structures found in chloroplasts, where light energy is absorbed and converted into ATP and NADPH.

Explanation

The sun is the ultimate source of energy for our planet, providing energy through solar radiation.

This energy is then converted into various forms, such as:

• Thermal energy (heat)
• Kinetic energy (wind, water currents)
• Electrical energy (generated from solar panels)
• Chemical energy (fossil fuels, biomass)
• Biological energy (food chains, ecosystems)

Explanation

Fungi are achlorophyllous, meaning they lack chlorophyll and are unable to photosynthesize.

Instead, they are absorptive living organisms, obtaining their nutrients by breaking down and absorbing organic matter from their surroundings.

Explanation

The gravitational field of Earth is a vector field that points towards the center of the Earth.

It representing the direction of the gravitational force that the Earth exerts on objects near its surface.

This means that the gravitational field is directed towards the Earth, pulling objects towards its center.

Explanation

The motion of a falling ball towards Earth is due to the gravitational force.

Gravitational force is the force that attracts the ball towards the Earth, causing it to accelerate downwards.