Explanation

Graphite is used for making the electrode in a dry cell.

Graphite is a good conductor of electricity, in fact, as good as metals

Graphite is used as an electrode because it conducts electricity without taking part in the chemical reaction

ND5.3.2023

Explanation

All important questions and Information Related to 'Photosynthesis"

Photosynthesis takes place in presence of the following light Only in sunlight from the sun

Photosynthesis takes place faster in white light

Photosynthesis occurs more in blue and red light rays

Photosynthesis occurs more in blue and red light rays and less, or not at all, in green light rays.

Green Light light is more important for photosynthesis.

As compared to photosynthesis, glucose is chiefly decomposed during Respiration

At the time of a Solar Eclipse, the rate of photosynthesis will: Decrease

In all plants, the major sites of photosynthesis are Leaves

In Photosynthesis reduction occurs in the Water

At night, when photosynthesis is stopped, plants Give off Carbon Dioxide.

Photosynthesis pigments are organized into clusters called thylakoid

The process of photosynthesis produces glucose and carbon dioxide

ND2-03-2023

******

ND11-12-2022

Explanation

Explanation

All important questions and Information Related to 'Photosynthesis"

Photosynthesis takes place in presence of the following light Only in sunlight from the sun

Photosynthesis takes place faster in white light

Photosynthesis occurs more in blue and red light rays

Photosynthesis occurs more in blue and red light rays and less, or not at all, in green light rays.

Green Light light is more important for photosynthesis.

As compared to photosynthesis, glucose is chiefly decomposed during Respiration

At the time of a Solar Eclipse, the rate of photosynthesis will: Decrease

In all plants, the major sites of photosynthesis are Leaves

In Photosynthesis reduction occurs in the Water

At night, when photosynthesis is stopped, plants Give off Carbon Dioxide.

Photosynthesis pigments are organized into clusters called thylakoid

The process of photosynthesis produces glucose and carbon dioxide

ND2-03-2023

Explanation

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products for a low-energy thermodynamic process.

This means there is no change in mass during a chemical reaction.

ND2-03-2023

Explanation

Why lightning comes faster than thunder? 5 marks

Lightning is faster than thunder.

• Lightning and thunder happen at the same time.

• But you see lightning before you hear thunder

• because light, which travels a million times faster than sound, arrives almost instantly.

• Sound, on the other hand, takes about five seconds to travel one mile.

• light at a speed of around 300,000,000 meters per second travels much faster than sound which moves at 340 meters per second.

Explanation

How is the Rainbow formed? 5 marks

Rainbow:

"A rainbow is a meteorological and optical phenomenon that is caused by the reflection, refraction, and dispersion of light in water droplets"

Color of Rianbow:

The colors of the rainbow are:

1. Red
2. orange
3. yellow
4. green
5. blue
6. indigo
7. and violet.

Rainbow formed:

• When sunlight hits a rain droplet, some of the light is reflected.
  
• The electromagnetic spectrum is made of light with many different wavelengths, and each is reflected at a different angle.
• Thus, the spectrum is separated, producing a rainbow.

ND23-2-2023

Explanation

Explain the solute and solvent with examples. 5 marks

Solute:

A solute is a substance that is dissolved in a dissolving medium called a solvent. 

The solubility of solute depends on solute properties such as the surface area of the solute

The boiling point of a solute is usually higher than that of a solvent

For example:

sugar, salt, solvent

* 

Solvent

The solvent is the material that usually decides the solution's physical state (solid, liquid, or gas). 

Two types of Solvent: Polar solvent, Non-Polar solvent

The solubility of solvent depends on solvent properties such as polarity

The boiling point of a solvent is usually lower than that of a solute

for example water

Explanation

Question: What is consciousness?  5 marks 

Definition:

• the word 'consciousness' describes perceptual awareness or self-awareness of your unique thoughts, memories, feelings, sensations, and environments
•  the content of consciousness mainly originates from the hindbrain. 

Types of Consciousness

1. Dreams.
2. Hallucinations.
3. Hypnosis.
4. Meditation.
5. Sleep.
6. States induced by psychoactive drugs.

Different levels of human Consciousness

Sigmund Freud divided human consciousness into three levels of awareness. 

Each of these levels corresponds and overlaps with his ideas of the id, ego, and superego. 

1. the conscious
2. preconscious,
3. and unconscious.

Five levels of Consciousness

There are five levels of consciousness:

1. Conscious (sensing, perceiving, and choosing)
2. Preconscious (memories that we can access)
3. Unconscious ( memories that we can not access)
4. Non-conscious ( bodily functions without sensation)
5. and Subconscious ( “inner child,” self-image formed in early childhood).

ND23-2-2023

Explanation

Energy has been around since the dawn of time.

The first source of energy was the sun, as it provided heat and light during the day.