3rd Year Christmas Tests Flashcards
Define the term of suitability of materials
Sustainability of materials is the extraction, use ,disposal and recycling of materials in ways that help to maintain these materials for future generations
How do we extract wood?
By logging of trees
How do we use wood?
Paper cardboard construction fuel, etc
How do we dispose of paper/ wood?
Landfills and incinerators are environments and friendly
How do you extract metals?
By mining, an open quarries are underground mines. both are damaging to water supplies and the visual environment the metal is extracted from an orc by either electrolysis or carbon reduction
What do we use metals for?
Jewelry windows construction
How do we dispose of metals?
Landfill
How do we extract plastics?
By drilling for crude oil mixture and then refining it into its various parts i.e. petrol diesel and the chemical from which most plastic polymers are made
What do you use plastic for?
Packaging making various lightweight products, toys clothing
How do we dispose of plastic
Landfill incinerating not sustainable while biodegradable plastic that is sustainable for composting and not wide developed
Define the term electrolysis
Using electricity to breakdown electrolytes to form elements
Define the term non-biodegradable
a kind of substance which cannot be broken down by natural organisms and acts as a source of pollution
What can I do to change gas back into liquid
Condensation
Name 3 types of microorganisms
Bacteria,fungi and viruses
Define the term diode
A diode allows a current flow through it in one direction only
Give me two examples of a diode
LED’s and streetlights
Name our galaxy
Milky Way
Define the term ecology
The branch of biology that studies the relationships of organisms to one another and to their environment.
Define the term dissipation
The loss of energy to less useful forms
What is photosynthesis
It is the way plants use light to make food
Write a word equation for photosynthesis
Carbon dioxide + water - chlorophyll + sunlight = glucose + oxygen
What is a biochemical reaction
A chemical reaction that takes place in living cell
What is the food chain
A food chain describes how energy and nutrients move through an ecosystem.
Why is it Difficult for human to explore Myers
It is difficult for human to explore my due to their being no water on mars and no oxygen
What is the reason for the Big Bang theory
Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth
Describe the process that happens to the bread from when it enters you body to when it leaves
Physical digestion of bread into small pieces by your teeth
Chemical digestion of starch by amylase enzymes into sugar
Persitalas pushes digested bread down the oesophagus into the stomach
Hydraulic acid added to kill bacteria
Sugars pushed into small intestine for complete digestion into glucose
Glucose absorbed into blood plasma
Glucose assimilates into cells where it is used in respiration to reales energy
Why do we need water in our lives
Water plays many important roles in the body including flushing waste from the body, regulating body temperature, transportation of nutrients and is necessary for digestion.
What are two things that caused an increase in global temperature?
The increased usage of fossil fuels and deforestation
What indicator do I use for my titration?
Methyl orange
Define the term speed
Distance travelled per unit time
Define the term velocity
Speed in any given direction
How are metals recycled?
They are recycled by re-melting and re-casting
What is one technological development that you studied?
X-ray machine
How does an x-ray machine benefit the environment?
Reduces the amount of radiation
What word is used to classify organisms that breakdown dead or decaying organisms in the soil?
Decomposers
Define the term natural satellite
Any body in space that orbits around a large body
What are the reasons for the notable seasons in countries around the world?
Earths tilt and revolution
Why do you not see a new moon at the beginning of a new lunar phase?
The size of the moon is not lit up by the Sun at all so we are unable to see anything
Why would it be difficult to live on the moon?
It would be difficult to live on the moon due to a lack of water and a lack of atmosphere there
What Is the unit for volume?
Meter cubed (M3)
How does a natural occurrence in the Earth affect climate change?
Changes in the suns emissions
What is it called when no more salute will dissolve the solvent?
Saturated
What is the ecosystem
A geographic area where plants, animals and other organisms, as well as weather and landscape, work together to form a bubble of life
What energy is produced in a food chain
Photosynthesis
What is monoculture?
The growing of a single crop in one area
What is negative impact of replacing bogland with grazing land?
It can lead to a lot of overgrazing
Why does a physical change occur?
Physical changes occurred due to energy change
What’s an element?
Contains one type of atom only e.g. H2 or NA
What is a compound?
Contains two more elements chemically combined, e.g. H2O or CO2
What is a mixture?
Two or more substances mingle together, e.g. salt water or muddy water
Define the term weight
Weight is a force pulling an object towards the centre of the Earth. It has a direction and can change. It gets smaller as you rise upwards from ground level. Weight is measured in N.
Define the term mass
Mass is the amount of matter contained in a body; it does not have direction and does not change. Mass is measured in g and kg.
Why use a thermos instead of a glass flask for experiments
As a thermos flask will minimise the amount of heat that is transferred
