What is Matter
Any physical substance that has mass and occupies space
What is Mass
A measurement of the amount of matter in an object
What is Volume
A measurement of the amount of space an object takes up
What is energy
Is the capacity to do work
Explain protons fully
- Positively charged, located in the nucleus.
- Determines the atom’s elemental identity
Explain electrons fully
- Negatively charged, orbits the nucleus
- Determines the atom’s reactivity
Expalin neutrons fully
- Neutral, located in the nucleus
- Determines the mass of the atom
Explain Molecules fully
- Are formed when two or more atoms become chemically bonded together.
- One of the first molecules was discovered when Joseph Priestley discovered that placing a jar over a candle would cause it to go out.
- He repeated the experiment with a mouse and concluded that the air had been “injured.”
- Priestly added a plant to the jar and found that the mouse lived much longe
What is the actual composition of air
- 78% Nitrogen (N2)
– 21% Oxygen (O2)
– 0.03% Carbon dioxide (CO2)
– 0.02% Water (H2O)
– Small amounts of other gases
What is Evolution
The process by which all of the living organisms on the Earth changed over time from their early ancestor species
Explain the environment
- Refers to the physical, living and non-living surroundings of society, and the interplay between them
– Climate
– Soil and landforms
– Water sources
– Other living organisms
Explain ecology
- Is the study of the relationships between organisms and the living and nonliving parts of the environment.
- Evolution is heavily influenced by these interactions
Explain Levels of Organization
- The cell is the smallest unit that can perform all the functions of life, including reproduction and homeostasis.
- Groups of cells that have similar shape and function are called tissues - Collections of tissues that work together to perform a task in the body are organs.
- Organ systems include multiple organs that work together to perform one or more functions
Explain the hierarchical system in ecology
- An organism is an individual living thing
- A single species of organism is one that is similar enough to breed and produce healthy, fertile offspring
- A population includes all members of a species that live in the same area at the same time
- The biological community is made of all populations living and interacting in one area
- An ecosystem includes the biological community and its surrounding physical environment.
- Nonliving factors like soil, precipitation, etc.
- The biosphere is the part of Earth that supports life – all ecosystems are found here
What is the importance of the environment
- Environment plays an important role in healthy living and the existence of life on planet earth
- Earth is a home for different living species and we all are dependent on the environment for food, air, water, and other needs.
- Therefore, it is important for every individual to save and protect our environment
Why is the Environment Important
- People depend on the environment for their livelihoods
- Caring for the environment creates more jobs
- Diverse environments strengthen food security
- Many diseases come from the environment
- Trees clean the air
- Unhealthy environments kill children
- The environment provides medicine
- Being in nature improves mental health
- Climate change impacts the environment
- Caring for the environment saves the planet
Explain Environment and Technology
- During the manufacturing of products, technology can be used to reduce the environmental burden and will focus on one of the following actions :
➢ Prevention of the formation of pollution.
➢ Prevention of emission.
➢ Prevention of distribution.
➢ Sanitation of pollution that has occurred.
What are different fields within environmental science
- Environmental law,
- Environmental management
- Environmental physics
What is evironmental science
The interdisciplinary science that keeps itself busy with the relationship between society and the environment and with the potential and actual problems within this relationship, with the purpose to indicate ways and means of solving or preventing these problems
Why do we need Environmental Control and Policy
- Rules and regulations to prevent and solve environmental problems.
- Address the effect on the environment.
- Address the (social) causes.
- These policies must be geared to the sustainability of the environment (it should not offer quick fixes or temporary solutions)
What are the human activities that destroy the environment
- Humans impact the physical environment in many ways: overpopulation, water and air pollution, burning fossil fuels, and deforestation
- Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water
- These negative impacts can affect human behaviour and can prompt mass migrations or battles over clean water, ozone layer depletion
What Steps Can Humans Take To Make A Positive Impact On The Ecosystem
- Water treatment plants for the treatment of industrial effluents and sewage need to be set up by us to prevent water bodies from getting contaminated.
- To prevent the spread of air pollution, we must use public transport whenever possible
- More trees should be planted, as they naturally purify the air.
Wildlife Conservation:
➢ Poaching and hunting must stop. We must boycott animal products, especially those made after hunting or poaching an endangered animal.
