Explanation

• Nebulae are primarily made up of Hydrogen (97%) and Helium (3%).
• These vast clouds of gas and dust serve as the birthplace of stars, with hydrogen being the most abundant element in the universe.

Explanation

• The wavelength of a transverse wave is the distance between two adjacent crests or troughs.
• It is a fundamental property of waves and is typically denoted by the symbol λ (lambda).

Explanation

• Meteoroids are small particles from space that enter the Earth's atmosphere.
• It producing a bright streak of light, commonly known as a shooting star or meteor.
• If a meteoroid survives its passage through the atmosphere and lands on Earth, it is called a meteorite.

Explanation

• The three bones in the middle ear are the malleus (hammer), incus (anvil), and stapes (stirrup).
• The stapes, or stirrup, is the last bone in the chain and transmits sound vibrations to the inner ear.

Explanation

• When sound travels through air, the air particles vibrate back and forth along the direction of wave propagation.
• This means that the air particles oscillate in the same direction as the sound wave is traveling.
• It allowing the energy of the sound wave to be transmitted through the air.

Explanation

• An atom is the smallest possible particle of an element that can combine to form new compounds.
• Atoms are the building blocks of matter, and they cannot be broken down into smaller particles.

Explanation

• If an opaque object is moved further away from the light source, the shadow gets smaller.
• This is because the light source appears smaller from a distance, casting a smaller shadow.

Explanation

Solid wastes that are easily decomposed by decomposers, such as bacteria, fungi, and other microorganisms, are called biodegradable wastes.

Examples of biodegradable wastes include:

• Food waste
• Vegetable and fruit peels
• Paper and cardboard
• Human waste
• Animal waste

Explanation

• Laboratory thermometers typically have a lower temperature range than clinical thermometers, and are designed to measure temperatures in a laboratory setting.
• The lowest temperature in a laboratory thermometer is often around -10°C or even lower, depending on the specific thermometer.

Explanation

The retina is the innermost layer of the eye that senses light and sends visual signals to the brain, much like the film in a camera captures images.