Explanation

• Plastic is a synthetic material that is resistant to decomposition and can take hundreds or even thousands of years to break down.
• It is a non-biodegradable material.

The examples of non-biodegradable materials such as:

• Inorganic materials (glass, ceramics, heavy metals)
• Synthetic materials (styrofoam, plastic bags, other plastic things)
• Hazardous materials (detergents, toxic chemicals)
• Industrial waste (empty cans, electricity wires, fused bulbs, broken machine parts)

Explanation

• The maize seed is surrounded by a seed coat (also known as the testa) and has an opening called the micropyle.
• The micropyle is a small pore or opening in the seed coat through which water enters the seed during germination.
• It allowing the seed to absorb moisture and begin the germination process.

Explanation

Explanation

• Reflection is the process by which light rays bounce back from a surface, without being absorbed or transmitted.
• This occurs when light hits a material object, such as a mirror, metal, or water.

Explanation

Planets and Natural Satellites:

• Mercury: 0
• Venus: 0
• Earth: 1 (Moon)
• Mars: 2 (Deimos, Phobos)
• Jupiter: 95
• Saturn: 274
• Uranus: 27

Explanation

• When a French bean germinates in soil, a hook-like structure emerges, which is called the hypocotyl.
• The hypocotyl is the stem of the seedling, and in French beans.
• It forms a hook-like structure that pushes the cotyledon (seed leaf) upwards.

Explanation

The Metric System of Measurements uses the mass units: gram (g), kilogram (kg), and tonne (t). 1000 g = 1 kg. 1000 kg = 1 tonne.

Mass was first defined in 1795

Symbol: M

Explanation

Evaporation is the process where liquid turns into gas at temperatures below its boiling point.

It occurs at the surface of the liquid.

It is influenced by factors like temperature and surface area.

Explanation

• An electric motor converts electrical energy into mechanical energy, producing motion or rotation.
• It uses electromagnetic forces to generate torque, which drives a shaft or other mechanical components.

Explanation

• When two opposite poles (north-south or south-north) of magnets are brought close to each other, they attract each other.
• This is because opposite poles have different polarities and therefore pull each other together.