Science Test
1. Give one example of linear motion and circular motion.
2. Define rest and motion.
3. Difference between biodegradable waste and non biodegradable waste.
4. Explain segregation of waste.
5. What is landfill and how it is created?
6. What is paper made from? Mention some ways?
7. How can we keep our sorroundings clean?
8. What is the difference between sanitation and sterilization?
Answers
Answer:
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The motion of an body along the straight line is called linear motion. For example, a car running straight towards the destination. The motion in which body moves along the circular path is called circular motion.
Rest - a body is said to be at rest, if it does not change its position with respect to its surrounding with time. Motion - a body is said to be at motion, if it changes its position with time.
Biodegradable substances are those which decompose naturally in the environment naturally and are considered beneficial for the environment. ... Non-biodegradable substances are those wastes which do not decompose naturally in the environment, causes pollution and are also harmful to the living being.
Waste segregation" means dividing waste into dry and wet. Dry waste includes wood and related products, metals and glass. Wet waste typically refers to organic waste usually generated by eating establishments and are heavy in weight due to dampness
A landfill is a place where waste is kept. ... Once the waste is crushed into very small pieces, it is buried, but without oxygen, a dangerous gas called methane is created. This process is called anaerobic digestion. In some countries, the methane from landfills is used to generate energy.
Paper is made in two steps: Cellulose fibers are extracted from a variety of sources and converted to pulp. Pulp is combined with water and placed on a paper making machine where it is flattened, dried, and cut into sheets and rolls.
Bring a bag. ...
Invest in a reusable water bottle. ...
Bring your own reusable cup. ...
Refuse single-use items. ...
Avoid products with microbeads. ...
Shop in bulk. ...
Make sure your waste goes to the right place. ...
Compost.
While sanitizing reduces microorganisms to a safe level, sterilizing removes all microorganisms from an item. Sterilizing is not often performed in a commercial kitchen environment, but is used in places like hospital operating rooms.