Explanation

• Photosynthesis is the process by which plants, algae, and some bacteria.
• It convert light energy from the sun into chemical energy in the form of glucose (sugar), using carbon dioxide and water as reactants.

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

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

• When the Moon and the Sun are on the same side of the Earth, we see a New Moon.
• This occurs when the Moon is between the Earth and the Sun, making the side of the Moon facing the Earth unilluminated.

Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

• The correct answer is: Particles have large empty spaces between them.
• This statement is incorrect because particles in liquids have small spaces between them, not large empty spaces.

Explanation

The life cycle of a frog:

• Frogspawn (Eggs): Laid by the female frog in water.
• Tadpoles (Larvae): Hatch from eggs, aquatic, and feed on algae.
• Froglet (Young Frog): Undergo metamorphosis, develop limbs, and lose tail.
• Frog (Adult): Fully developed, breathing air, and reproducing.

Explanation

In a gas, the particles are:

• Widely spread out, with no fixed position or arrangement
• Not in a regular pattern, with no repeating structure or order
• Separated by large empty spaces, with no close packing or cohesion

Explanation

• The Earth rotates on its axis, completing one full rotation in 24 hours.
• This is the equivalent of 1,440 minutes or 86,400 seconds.
• This rotation is what gives us day and night, as different parts of the planet face towards or away from the Sun.

Explanation

• The freezing point of water is 0°C (zero degrees Centigrade). 
• The boiling point of water on the Centigrade scale (also known as the Celsius scale) 100°C (one hundred degrees Centigrade).