Third Year Test 1

Question 1

What is force

Answer 1

Force causes movement

Question 2

What did Isaac Newton define force as

Answer 2

As allowing/causing stationer objects to move, causing a moving object to change direction, slow down or speed up

Question 3

What is six types of forces?

Answer 3

1. Gravity.2. Magnetic 3. Electric 4. Push.5. Pull 6. Friction

Question 4

What is the unit of force

Answer 4

Newton

Question 5

What reduces friction

Answer 5

Lubricants

Question 6

Tell me about weight

Answer 6

Weight is the force pulling an object to the centre of the Earth. It is measured in neutrons. weight does change as gravity changes.

Question 7

Define the term mass

Answer 7

It is the amount of matter (solid,liquid,gas) that an object contains. It is measured in kg or g. Does not change as gravity changes

Question 8

What was hooks law

Answer 8

Hooks law was that as the graph is a straight line to the origin (00) the extension of the spring is directly proportional to the force applied

Question 9

What is a biochemical process?

Answer 9

A biochemical process chemical reaction takes place in a living thing

Question 10

Define the term photosynthesis

Answer 10

Photosynthesis is a process of plants trapped light energy to make food

Question 11

Name five factors that need for photosynthesis

Answer 11

Light,carbon dioxide,water,chlorophyll,temperature

Question 12

Define the term light

Answer 12

Light is needed to provide energy to form glucose. As light intensity increases the rate of photosynthesis increases levels decrease to the lack of CO2 or water

Question 13

Define the term carbon dioxide in plant photosynthesis

Answer 13

Carbon dioxide is mostly absorbs to the stoma(tiny holes) in a plants leaves. As CO2levels rise the rise of photosynthesis increases other factors límite it example light

Question 14

Define the term water

Answer 14

Water is observed by the roots need to make glucose and allow enzymes to function

Question 15

Define the term chlorophyll

Answer 15

Chlorophyll is the green pigments used to absorb the light energy needed to make glucose. It is found in the chloroplast of cells.

Question 16

Define the term temperature

Answer 16

Most plants enzymes were best between 20°C and 30°C

Question 17

Define the term respiration

Answer 17

It is the release of energy from food

Question 18

Name two different types of respiration

Answer 18

Anoerobic respiration and aerobic respiration

Question 19

Define the term aerobic respiration

Answer 19

It is a release of energy from food using oxygen glucose oxygen equals carbon dioxide plus water plus energy

Question 20

Define the term anaerobic respiration

Answer 20

Is the release of energy from food without using oxygen

Question 21

Tell me about anaerobic respiration in animals

Answer 21

Glucose equals lactic acid plus small amount of energy due to muscle sales are getting enough O2 it can cause cramps plus sore muscles

Question 22

Tell me about anaerobic respiration in plants and yeast

Answer 22

Glucose equals ethanol plus CO2 plus small amount of energy. Used in baking as CO2 causes dough to rise, yeast and brewing and wine making.

Question 23

List four factors are affect respiration

Answer 23

Temperature,oxygen,glucose,water

Question 24

Define the term temperature for respiration

Answer 24

As enzymes control respiration as temp increases, the rate increases above a certain temperature rate decreases as enzymes are destroyed

Question 25

Where does respiration take place?

Answer 25

Mitochondria

Question 26

What is an organism that uses anaerobic respiration?

Answer 26

Yeast cells

Question 27

What fluid brings food and oxygen to cell?

Answer 27

Haemoglobin

Question 28

How do the waste products get from the cells lungs to be extracted

Answer 28

Blood plasma

Question 29

In which part of plants does the most photosynthenis take place?

Answer 29

Leaves

Question 30

Name chemicals that is necessary for photosynthesis

Answer 30

Carbon dioxide

Question 31

Name the organelle where photosynthesis take place

Answer 31

Chromoplast

Question 32

Define the term conservation

Answer 32

Conservation is the protection of plants, animals and natural areas from the damaging effects of human activity.

Question 33

Why is human population increasing

Answer 33

Due to increased food supply and better medicine

Question 34

Name and explain 2 ways we can increase the food supply

Answer 34

1. Convert more natural ares to farmland-undesirable as it leads to biodiversity loss
2. Improve yield of crops-by genetic engineering/selective breeding to develop drought
   resistant,improve size and taste,improve disease resistance,etc.

Question 35

Name and explain 2 ways we can increase the food supply

Answer 35

1. Convert more natural ares to farmland-undesirable as it leads to biodiversity loss
2. Improve yield of crops-by genetic engineering/selective breeding to develop drought
   resistant,improve size and taste,improve disease resistance,etc.

Question 36

List 4 ways that we can overcome the food gap

Answer 36

Reduce food waste
Adjust are diets to more plant based as it is more sustainable than animal based
Control human population growth
Maximise the use of existing farmland

Question 37

List 4 causes of biodiversity loss

Answer 37

1. Habitat loss/fragmentation:eg cutting down all or large parts of forest
2. Invasive species:eg grey squirrel,Japanese knotweed
3. Over exploration:eg overfishing
4. Pollution by humans adding harmful minerals to the environment:eg sewage,oil,acid rain

Question 38

How can we conserve biodiversity

Answer 38

1. Reduce pollution (reduce,reuse,recycle)
2. Rewild/plant new forest with native species
3. Develop national parks/special areas of conservation

Question 39

composting examples

Answer 39

Brown bin collection, compost heap at house

Question 40

Negatives of a landfill

Answer 40

Leaks toxins,undesirable,smelly,litter,vermin

Question 41

Define the term incinerator and explain what it does

Answer 41

It’s the burning of waste at a height temperature and it reduces landfill and generates electricity

Question 42

List 5 benefits of a healthy ecosystem

Answer 42

1. Clean water supplies
2. Greater biodiversity
3. Sources of wood/food/medicine
4. Less pollution+soil erosion+flooding
5. Recreation/ecotourism

Question 43

Named chemical equation for photosynthesis

Answer 43

Carbon dioxide plus water equals glucose plus oxygen