Explanation

• Aeroplanes fly in the troposphere.
• It is the lowest layer of the Earth's atmosphere.
• It extending up to about 12 km (7.5 miles) above the Earth's surface.
• The troposphere is where weather occurs, and it's the layer where aircraft operate.
• It typically cruising at altitudes between 30,000 to 40,000 feet (9,100 to 12,200 meters).

Additional information:

• Stratosphere: Contains the ozone layer.
• Mesosphere: Most meteors burn up here.
• Thermosphere: Includes much of the ionosphere and auroras.

Last verified on 12-10-2026

Explanation

• The modern periodic table arranges elements in order of increasing atomic number.
• The atomic number is the number of protons present in the nucleus of an atom.
• Elements with similar chemical properties are placed in the same group (vertical column).
• The modern periodic law was established by Henry Moseley.

Last verified on 12-10-2026

Explanation

• A rainbow forms when sunlight is refracted, reflected, and dispersed through water droplets in the atmosphere.
• Refraction bends the light, while dispersion separates it into seven colors, creating a rainbow.

Last verified on 10-10-2026

Explanation

• The cerebellum controls balance, posture, and coordination of voluntary movements.
• It helps make movements smooth, precise, and properly coordinated.
• It is located at the back of the brain, beneath the cerebrum.

Additional information:

• Cerebrum: Thinking, memory, intelligence, and voluntary actions.
• Thalamus: Relays most sensory information to the cerebral cortex.
• Medulla oblongata: Controls involuntary functions such as breathing and heartbeat.

Last verified on 10-10-2026

Explanation

• An ammeter is specifically designed to measure electric current.
• A multimeter can also measure current, voltage, and resistance.
• Electric current is measured in amperes (A).
• An ammeter is connected in series with the circuit to measure current.

Additional information:

• Voltmeter: Measures voltage.
• Ohmmeter: Measures resistance.

Last verified on 10-10-2026