Explanation

Tetanus is a bacterial infection that can cause muscle stiffness and spasms.

It particularly in the jaw muscles, leading to the characteristic symptom of "lockjaw".

Explanation

The cranium is the bony structure that encloses and protects the human brain.

It is also known as the skull.

It forms the upper part of the skull.

It providing a protective casing for the brain.

Explanation

The atmospheric pressure at any place is measured by a Barometer

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The barometer was invented by Evangelista in 1644.

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Explanation

Bronchitis is a disease related to the respiratory tract.

It is characterized by inflammation of the bronchial tubes.

It leads to coughing and breathing difficulties.

Bronchitis is a condition that develops when the airways in the lungs.

It usually happens because of a virus that irritates the lungs

such as:

• tobacco smoke
• fumes
• dust
• and air pollution

Explanation

Explanation

Each of these statements is true:

• Water-soluble vitamins cannot be stored in the body: Vitamins like vitamins C and the B vitamins are water-soluble.
• Fat-soluble vitamins can be stored in the body: Vitamins A, D, E, and K are fat-soluble and can be stored in the body's fatty tissues and liver
• The body can absorb more of a fat-soluble vitamin than required: Unlike water-soluble vitamins, excess intake of fat-soluble vitamins can lead to accumulation in the body

Explanation

Acid rain contains high levels of sulphuric acid and nitric acid.

It formed when sulfur dioxide (SO₂) and nitrogen oxides (NOx) react with water in the atmosphere.

These acids contribute to environmental damage.

Explanation

• The greenhouse effect is an environmental problem caused by the increasing amount of carbon dioxide (CO2) in the atmosphere.
• Primarily due to human activities such as burning fossil fuels, deforestation, and land-use changes.
• This excess CO2 traps heat and leads to global warming and climate change.

Explanation

Global warming began to accelerate with the advent of the Industrial Revolution, due to increased greenhouse gas emissions.

Since the start of the Industrial Revolution, in about 1750,

Human activities  have increased greenhouse gas concentrations in our atmosphere. such as :

• burning fossil fuels
• including coal and oil
  

Explanation

• On Earth, surface water covers 70% area.
• 70-71 percent of the Earth's surface is water-covered.
• The oceans hold about 96.5 percent of all Earth's water.
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• This includes oceans, rivers, lakes, glaciers, and groundwater.