interactions-science

• Interactions refer to the relationships formed among the different forms of matter and the effect they have on each other.
• Changes are the result of interactions
• Changes are brought about by the transfer of energy between matter.
• Changes in:

  -motion: fast/slow

  -conditions: big/small
• Changes may increase or decrease the stability within a system.
• Interactions reveal patterns in nature that help us predict how changes in one factor could affect other factors in a system.
• Wasting food is wasting the limited resources on Earth. Because growing livestock and crops for food requires water, energy and minerals in the soil.
• Using more electricity than needed means burning more fuels, so more carbon dioxide is generated, contributes to climate change.
• Using more water than needed. Water is a limited resource, more consumption=fresh water become scarce.
• Creating excessive waste means more waste to be disposed of, causing higher chances of pollution.
• Types of pollution caused by improper disposal of waste:

  Air-burning produces greenhouse/toxic gases.

  Water-plastics in oceans, marine organisms die from consumption.

  Soil-contaminated form the hazardous chemicals.
• Ways to conserve the environment: Conservation, sustainable resource management, adopting clean and renewable energy sources, reducing waste and promoting environmental awareness.
• Reducing the burning of fossil fuels for generating electricity:

  Take public transport/walk instead of private transport
• Reducing consumption:

  Minimise the use of paper, reuse and recycle. Less raw materials such as wood, reduces deforestation.

  Reduce use of plastic bags by using reusable bags.
• Environmentally friendly practices:

  Less disposables-reusable bags, no plastic straws.

  Carbon tax for carbon emission and burning of fossil fuels, which reduces the emission of greenhouse gases which contribute to global warming.
• Reforestation protects soil which stores carbon. More plants=more carbon storage, reduces amt of carbon dioxide in air.
• Physical factors are measured by data loggers and probes
• Physical factors:

  Light, Temperature, Water, Air, pH level/acidity, mineral salts/salinity.
• Light-rate of photosynthesis and for animals to see so they can avoid danger and find food.
• Temperature slows down the rate of photosynthesis and blood circulation. The growth of plants is stunted and the animals become sluggish.
• Polluted water contains less oxygen than normal water, so many fishes die due to lack of sufficient oxygen.
• Adaptations are features that help an organism survive in its environment. Animals adapt to its environment according to its needs.
• Plants do not grow well if they lack mineral salts.
• The stronger the sunlight, the higher the pH level of the water/the more alkalic the water is.

  Aquatic plants use the dissolved carbon dioxide to carry out photosynthesis. Less acidity in the water caused by dissolved carbon dioxide.
• Climate change causes many changes to an animal's habitat, if they adapt, their population will remain constant or increase, and if they do not, they will go extinct.
• Biotic environment refers to...

  All the organisms in a habitat
• Relationships between organisms: predator-prey, parasitism, commensalism and mutualism
• Green plants are producers
• Temperature affects enzymes found in living organisms. Most organisms can only live

  within a certain range of temperatures.