Explanation

Water (H₂O) is a pure compound, not a mixture.

Tea, air, and alloys are mixtures of different substances.

Explanation

Sodium is a chemical element with the symbol Na and atomic number 11.

It is a soft, silvery-white, highly reactive metal.

Sodium is an alkali metal, being in group 1 of the periodic table.

Explanation

A food web is formed by interconnected food chains in an ecosystem.

It shows multiple feeding relationships and energy flow among organisms.

Explanation

Sepals are part of the flower that protects the developing bud but do not participate in reproduction.

Pollen grain, ovule, and carpel are directly involved in the reproductive process.

Explanation

Abiotic components are non-living parts of the environment.

Water vapor is a non-living element.

While beetle, apple, and lion are living organisms.

Explanation

Photosynthesis occurs most efficiently in this temperature range, as enzymes involved in the process function optimally.

Temperatures above 35°C can inhibit enzyme activity, reducing the rate of photosynthesis.

Explanation

Sense organs like eyes, ears, nose, skin, and tongue detect different stimuli.

They send signals to the brain, enabling us to perceive the environment.

Explanation

Muscle is a type of tissue that contracts to produce movement.

The three main types of muscle tissues are skeletal, smooth, and cardiac.

Explanation

Explanation

The theory of relativity usually encompasses two interrelated theories by Albert Einstein:

special relativity and general relativity, proposed and published in 1905 and 1915

E =mc2

 C in this equation Velocity of light

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Principle of Theory of relativity

ND27122022