3rd Year Christmas Tests Flashcards

1
Q

Define the term of suitability of materials

A

Sustainability of materials is the extraction, use ,disposal and recycling of materials in ways that help to maintain these materials for future generations

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2
Q

How do we extract wood?

A

By logging of trees

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3
Q

How do we use wood?

A

Paper cardboard construction fuel, etc

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4
Q

How do we dispose of paper/ wood?

A

Landfills and incinerators are environments and friendly

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5
Q

How do you extract metals?

A

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

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6
Q

What do we use metals for?

A

Jewelry windows construction

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7
Q

How do we dispose of metals?

A

Landfill

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8
Q

How do we extract plastics?

A

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

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9
Q

What do you use plastic for?

A

Packaging making various lightweight products, toys clothing

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10
Q

How do we dispose of plastic

A

Landfill incinerating not sustainable while biodegradable plastic that is sustainable for composting and not wide developed

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11
Q

Define the term electrolysis

A

Using electricity to breakdown electrolytes to form elements

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12
Q

Define the term non-biodegradable

A

a kind of substance which cannot be broken down by natural organisms and acts as a source of pollution

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13
Q

What can I do to change gas back into liquid

A

Condensation

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14
Q

Name 3 types of microorganisms

A

Bacteria,fungi and viruses

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15
Q

Define the term diode

A

A diode allows a current flow through it in one direction only

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16
Q

Give me two examples of a diode

A

LED’s and streetlights

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17
Q

Name our galaxy

A

Milky Way

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18
Q

Define the term ecology

A

The branch of biology that studies the relationships of organisms to one another and to their environment.

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19
Q

Define the term dissipation

A

The loss of energy to less useful forms

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20
Q

What is photosynthesis

A

It is the way plants use light to make food

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21
Q

Write a word equation for photosynthesis

A

Carbon dioxide + water - chlorophyll + sunlight = glucose + oxygen

22
Q

What is a biochemical reaction

A

A chemical reaction that takes place in living cell

23
Q

What is the food chain

A

A food chain describes how energy and nutrients move through an ecosystem.

24
Q

Why is it Difficult for human to explore Myers

A

It is difficult for human to explore my due to their being no water on mars and no oxygen

25
Q

What is the reason for the Big Bang theory

A

Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth

26
Q

Describe the process that happens to the bread from when it enters you body to when it leaves

A

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

27
Q

Why do we need water in our lives

A

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.

28
Q

What are two things that caused an increase in global temperature?

A

The increased usage of fossil fuels and deforestation

29
Q

What indicator do I use for my titration?

A

Methyl orange

30
Q

Define the term speed

A

Distance travelled per unit time

31
Q

Define the term velocity

A

Speed in any given direction

32
Q

How are metals recycled?

A

They are recycled by re-melting and re-casting

33
Q

What is one technological development that you studied?

A

X-ray machine

34
Q

How does an x-ray machine benefit the environment?

A

Reduces the amount of radiation

35
Q

What word is used to classify organisms that breakdown dead or decaying organisms in the soil?

A

Decomposers

36
Q

Define the term natural satellite

A

Any body in space that orbits around a large body

37
Q

What are the reasons for the notable seasons in countries around the world?

A

Earths tilt and revolution

38
Q

Why do you not see a new moon at the beginning of a new lunar phase?

A

The size of the moon is not lit up by the Sun at all so we are unable to see anything

39
Q

Why would it be difficult to live on the moon?

A

It would be difficult to live on the moon due to a lack of water and a lack of atmosphere there

40
Q

What Is the unit for volume?

A

Meter cubed (M3)

41
Q

How does a natural occurrence in the Earth affect climate change?

A

Changes in the suns emissions

42
Q

What is it called when no more salute will dissolve the solvent?

43
Q

What is the ecosystem

A

A geographic area where plants, animals and other organisms, as well as weather and landscape, work together to form a bubble of life

44
Q

What energy is produced in a food chain

A

Photosynthesis

45
Q

What is monoculture?

A

The growing of a single crop in one area

46
Q

What is negative impact of replacing bogland with grazing land?

A

It can lead to a lot of overgrazing

47
Q

Why does a physical change occur?

A

Physical changes occurred due to energy change

48
Q

What’s an element?

A

Contains one type of atom only e.g. H2 or NA

49
Q

What is a compound?

A

Contains two more elements chemically combined, e.g. H2O or CO2

50
Q

What is a mixture?

A

Two or more substances mingle together, e.g. salt water or muddy water

51
Q

Define the term weight

A

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.

52
Q

Define the term mass

A

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.