Science and Technology Overview

Science: Way to understand the world; includes biology (living things), chemistry (changes in matter), and physics (matter and energy).
Technology: Creation of systems and objects to meet needs.
Difference: Science seeks knowledge; technology applies that knowledge.
Impact of Technology on Society:
- Communication: Easier and faster through devices like phones and internet.
- Transport: Vehicles enable quicker travel.
- Medical: Advances in diagnosis and treatment.
- Jobs: Technology creates employment opportunities; however, can lead to job losses due to automation.
- Environmental Concerns: Pollution and waste from technological processes.

Society influences technological development based on needs, culture, and preferences.
Examples: Mobile phones for communication, HIV/AIDS testing technology due to health needs.
Global competition may drive technological advancements in weapons or medical technology.

Pollution: Waste from technology can contaminate the environment.
Health Advances: Medical technologies like X-rays and vaccinations have significantly improved health outcomes.

Questioning: Formulate scientific, clear, and measurable questions.
Hypothesizing: Create a testable hypothesis based on observations.
Experimenting: Conduct fair tests while controlling variables; establish control and experimental groups.
Data Recording and Analysis: Organize results using tables, graphs, or charts.
Conclusion and Communication: Summarize findings and share with the community.

Length, Area, Volume: Common units include meters (m), square meters (m²), and cubic meters (m³).
Mass: Measured in kilograms (kg) with instruments such as balance scales.
Density: $ ext{Density} = rac{ ext{Mass}}{ ext{Volume}}$.
Temperature: Measured in Celsius (°C); changes between Celsius and Kelvin are $ ext{K} = ext{°C} + 273$.

Living organisms are categorized into ecosystems (interactions between organisms and environment).
Habitats, Communities, Ecosystems: Important for understanding biodiversity.
Food Chains and Webs: Show energy transfer from producers to various levels of consumers.

Types of Reactions: Neutralization, combustion, synthesis, decomposition.
Acids and Bases: Identified by pH; reactions between them produce salts and water.
Rate of Reactions: Influenced by temperature, concentration, surface area, and the presence of catalysts.

Coordinate body functions through hormones and electrical signals.
Hormones produced by endocrine glands affect growth, metabolism, and reproduction.

Forms include heat, light, electrical, and mechanical energy; transfers through conduction, convection, and radiation.

Proper preventive measures necessary when handling chemicals, managing health conditions like HIV/AIDS, and during physical activities to ensure safety and wellbeing.
Good hygiene practices and regular checkups are emphasized for health maintenance.

Involves studying celestial bodies and utilizing technology like telescopes and rockets for exploration, leading to advancements in various scientific fields.