3rd Year Christmas Tests

Question 1

Define the term of suitability of materials

Answer 1

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

Question 2

How do we extract wood?

Answer 2

By logging of trees

Question 3

How do we use wood?

Answer 3

Paper cardboard construction fuel, etc

Question 4

How do we dispose of paper/ wood?

Answer 4

Landfills and incinerators are environments and friendly

Question 5

How do you extract metals?

Answer 5

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

Question 6

What do we use metals for?

Answer 6

Jewelry windows construction

Question 7

How do we dispose of metals?

Answer 7

Landfill

Question 8

How do we extract plastics?

Answer 8

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

Question 9

What do you use plastic for?

Answer 9

Packaging making various lightweight products, toys clothing

Question 10

How do we dispose of plastic

Answer 10

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

Question 11

Define the term electrolysis

Answer 11

Using electricity to breakdown electrolytes to form elements

Question 12

Define the term non-biodegradable

Answer 12

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

Question 13

What can I do to change gas back into liquid

Answer 13

Condensation

Question 14

Name 3 types of microorganisms

Answer 14

Bacteria,fungi and viruses

Question 15

Define the term diode

Answer 15

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

Question 16

Give me two examples of a diode

Answer 16

LED’s and streetlights

Question 17

Name our galaxy

Answer 17

Milky Way

Question 18

Define the term ecology

Answer 18

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

Question 19

Define the term dissipation

Answer 19

The loss of energy to less useful forms

Question 20

What is photosynthesis

Answer 20

It is the way plants use light to make food

Question 21

Write a word equation for photosynthesis

Answer 21

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

Question 22

What is a biochemical reaction

Answer 22

A chemical reaction that takes place in living cell

Question 23

What is the food chain

Answer 23

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

Question 24

Why is it Difficult for human to explore Myers

Answer 24

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

Question 25

What is the reason for the Big Bang theory

Answer 25

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

Question 26

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

Answer 26

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

Question 27

Why do we need water in our lives

Answer 27

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.

Question 28

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

Answer 28

The increased usage of fossil fuels and deforestation

Question 29

What indicator do I use for my titration?

Answer 29

Methyl orange

Question 30

Define the term speed

Answer 30

Distance travelled per unit time

Question 31

Define the term velocity

Answer 31

Speed in any given direction

Question 32

How are metals recycled?

Answer 32

They are recycled by re-melting and re-casting

Question 33

What is one technological development that you studied?

Answer 33

X-ray machine

Question 34

How does an x-ray machine benefit the environment?

Answer 34

Reduces the amount of radiation

Question 35

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

Answer 35

Decomposers

Question 36

Define the term natural satellite

Answer 36

Any body in space that orbits around a large body

Question 37

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

Answer 37

Earths tilt and revolution

Question 38

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

Answer 38

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

Question 39

Why would it be difficult to live on the moon?

Answer 39

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

Question 40

What Is the unit for volume?

Answer 40

Meter cubed (M3)

Question 41

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

Answer 41

Changes in the suns emissions

Question 42

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

Answer 42

Saturated

Question 43

What is the ecosystem

Answer 43

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

Question 44

What energy is produced in a food chain

Answer 44

Photosynthesis

Question 45

What is monoculture?

Answer 45

The growing of a single crop in one area

Question 46

What is negative impact of replacing bogland with grazing land?

Answer 46

It can lead to a lot of overgrazing

Question 47

Why does a physical change occur?

Answer 47

Physical changes occurred due to energy change

Question 48

What’s an element?

Answer 48

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

Question 49

What is a compound?

Answer 49

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

Question 50

What is a mixture?

Answer 50

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

Question 51

Define the term weight

Answer 51

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.

Question 52

Define the term mass

Answer 52

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.

Question 53

Why use a thermos instead of a glass flask for experiments

Answer 53

As a thermos flask will minimise the amount of heat that is transferred