Explanation

The ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light.

Ozone is made of O3.

Explanation

• As gas particles move faster, they exert a greater force on the container walls, resulting in increased pressure.
• This relationship is described by the kinetic molecular theory, which states that the pressure of a gas is directly proportional to the square of its velocity.

Explanation

The Hindbrain is divided into three main parts:

• Medulla Oblongata (controls breathing, heart rate, and blood pressure)
• Pons (involved in controlling sleep and arousal)
• Cerebellum (coordinates movement, balance, and learning)

Explanation

• The flow of electrons is called Electric Current.
• Electric current is the flow of electrons through a conductor, such as a wire.
• It is measured in amperes (A).

Explanation

• Air pollution is actually considered the most dangerous type of pollution.
• According to the World Health Organization (WHO), air pollution is responsible for an estimated 7 million premature deaths worldwide each year, mainly due to heart disease, stroke, and lung cancer.

Explanation

• Structure of DNA was discovered by James Watson and Francis Crick in 1953.
• They discovered the double-helix structure of DNA using X-ray crystallography data.
• Their discovery revealed the double-helix structure of DNA, where two complementary strands are twisted together with sugar and phosphate molecules, and the nitrogenous bases (adenine, thymine, cytosine, and guanine) pair in a specific manner.

Explanation

• Thermal Contraction is the decrease in size (length, area, and volume) of a body due to a decrease in temperature.
• Thermal Expansion is the opposite phenomenon, where the size increases due to an increase in temperature.

Explanation

The pressure of a gas in a container is affected by:

• Temperature (increases with temperature)
• Volume (decreases with increasing volume)
• Density of gas (increases with density)

However, the material of the container does not directly affect the pressure of the gas.

Explanation

• The nucleus is responsible for cell division because it contains chromosomes, which are made up of DNA and proteins.
• Chromosomes carry the genetic information necessary for cell division, growth, and function.

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.