Explanation

The life cycle of a bee:

• Egg: Laid by the queen bee in the honeycomb cell.
• Larva (Grub): Hatches from the egg, fed royal jelly and pollen.
• Pupa (Cocoon): Transforms into a pupa, undergoing metamorphosis.
• Bee (Adult): Emerges from the pupa, ready to fly and perform colony tasks.

Explanation

Oil and gas are not renewable energy sources. 

They are fossil fuels that deplete over time and take millions of years to form.

The renewable energy sources are:

• Water energy
• Wind energy
• Tidal energy
• Hydroelectric
• Ocean energy
• Geothermal energy
• Biomass
• Biogas

The non-renewable energy sources are:

• Fossil fuels or Hydrocarbon fuel (Oil, Natural gas, Coal)
• Nuclear energy

Explanation

• A Decomposition Reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.
• This is the opposite of a Combination Reaction, where two or more substances combine to form a new compound.

Explanation

• Mitosis is a process of cell division that results in the production of two daughter cells, each with the same number of chromosomes as the parent cell.
• This process is essential for growth, repair, and asexual reproduction in living organisms.

Explanation

• When two bulbs are connected in a series circuit and one bulb blows, the entire circuit is interrupted, and the other bulb will also stop glowing, i.e., also blow (blast).
• This is because there is no longer a complete path for current to flow through the circuit.

Explanation

• Binoculars typically use Porro prisms, which are a type of reflecting prism that uses total internal reflection to redirect light.
• Porro prisms are named after their inventor, Ignazio Porro, and are widely used in binoculars and other optical instruments.

Explanation

• A release of gas is typically a sign of a chemical change, not a physical change.

The signs of physical change:

• Change that can be reversed
• The substance does not turn into a new substance

Explanation

• About 97.5% of the water on Earth is saltwater, found in oceans, seas, and salt lakes.
• The remaining 2.5% is freshwater, found in rivers, lakes, wetlands, and underground aquifers.

Explanation

• The speed of sound in aluminium is approximately 6420 meters per second.
• It is significantly faster than the speed of sound in air due to aluminium's higher density and elastic properties.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

• Magnesium (Mg) is an element, not a compound.
• It is a pure substance made up of only one type of atom.
• Whereas compounds are made up of two or more different elements.

Examples of compounds:

• Water (H2O) - Compound of Hydrogen and Oxygen
• Common salt (NaCl) - Compound of Sodium and Chlorine
• Washing soda (Na2CO3) - Compound of Sodium, Carbon, and Oxygen
• Carbon dioxide (CO2) - Compound of Carbon and Oxygen
  
• Sugar (C6H12O6) - Compound of Carbon, Hydrogen, and Oxygen