Adaptation

Adaptation is the process where a living organism becomes better suited to its environment to survive and reproduce. Think of it as a helpful feature that an organism has developed over time.

•  A characteristic or trait that increases an organism's chances of survival and successful reproduction in its specific habitat.

•  It results from natural selection acting on variations within a species over many generations.

• Species: A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.

• Examples:

• Viruses come in many shapes and structures.

• Each virus has a core of genetic material — either RNA or DNA — surrounded by a protein coat.

• They do not have:

  • Nucleus

  • Cytoplasm

  • Cell organelles

What are Exothermic reactions

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Exothermic reactions are chemical processes that release energy, typically as heat, into the surroundings.

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The equation of potassium with water is

potassium + water --> potassium hydroxide + hydrogen

Microorganisms are tiny living things that cannot be seen with our eyes. They include bacteria and fungi. These microorganisms play an important role in decay. Decay means the breaking down of dead plants, dead animals, food scraps, and other organic materials.

When something dies or falls to the ground, microorganisms start to feed on it. As they feed, they break the material into smaller and simpler substances. This process releases nutrients back into the soil.

The Nervous System

The nervous system is one of the most important systems in our body. It helps us feel, move, think, and respond to what is happening around us. It acts like the contrl centerol for our whole body.

Main Parts:

1. Brain:

   • The main control center.

   • It helps us think, learn, remember, and make decisions.

Liquid Pressure

• Liquid pressure is the force that a liquid exerts on the walls or bottom of its container.

• It is caused by the weight of the liquid and acts in all directions.

• The deeper you go, the greater the pressure — because more liquid is above that point.

• Example: When you dive deeper into a swimming pool, you feel more pressure on your ears — that’s liquid pressure increasing with depth.

Gas Pressure

Price Elasticity of Supply (PES)

• Definition: PES measures how much the quantity supplied of a good changes when its price changes.

• Formula:

  

• Elastic Supply (PES > 1): Supply changes more than price.

• Inelastic Supply (PES < 1): Supply changes less than price.

Concave and convex lenses are two types of lenses that refract light differently due to their shape. A convex lens is thicker at the center, causing parallel light rays to converge to a focal point, and is also known as a converging lens. A concave lens is thinner at the center, causing parallel light rays to diverge, and is also called a diverging lens.

Convex lens

Shape: Thicker at the center and thinner at the edges.

Function: Converges parallel light rays to a single focal point.

Focal Length: Positive.

Uses: Magnifying glasses, cameras, microscopes, and for correcting farsightedness (hypermetropia).

• ozone is a gas

• their is a layer of ozone high up in the atmosphere

• the ozone layer is 25 km of the ground

• the sun sends out ultraviolet rays it can harm living organisms

• the ozone layer reduces the ultraviolet ray that reaches the ground

• in 1985 scientists discovered that their is less ozone layer in the antarctic