Third Year Test 1 Flashcards
What is force
Force causes movement
What did Isaac Newton define force as
As allowing/causing stationer objects to move, causing a moving object to change direction, slow down or speed up
What is six types of forces?
- Gravity.2. Magnetic 3. Electric 4. Push.5. Pull 6. Friction
What is the unit of force
Newton
What reduces friction
Lubricants
Tell me about weight
Weight is the force pulling an object to the centre of the Earth. It is measured in neutrons. weight does change as gravity changes.
Define the term mass
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
What was hooks law
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
What is a biochemical process?
A biochemical process chemical reaction takes place in a living thing
Define the term photosynthesis
Photosynthesis is a process of plants trapped light energy to make food
Name five factors that need for photosynthesis
Light,carbon dioxide,water,chlorophyll,temperature
Define the term light
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
Define the term carbon dioxide in plant photosynthesis
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
Define the term water
Water is observed by the roots need to make glucose and allow enzymes to function
Define the term chlorophyll
Chlorophyll is the green pigments used to absorb the light energy needed to make glucose. It is found in the chloroplast of cells.
Define the term temperature
Most plants enzymes were best between 20°C and 30°C
Define the term respiration
It is the release of energy from food
Name two different types of respiration
Anoerobic respiration and aerobic respiration
Define the term aerobic respiration
It is a release of energy from food using oxygen glucose oxygen equals carbon dioxide plus water plus energy
Define the term anaerobic respiration
Is the release of energy from food without using oxygen
Tell me about anaerobic respiration in animals
Glucose equals lactic acid plus small amount of energy due to muscle sales are getting enough O2 it can cause cramps plus sore muscles
Tell me about anaerobic respiration in plants and yeast
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.
List four factors are affect respiration
Temperature,oxygen,glucose,water
Define the term temperature for respiration
As enzymes control respiration as temp increases, the rate increases above a certain temperature rate decreases as enzymes are destroyed
Where does respiration take place?
Mitochondria
What is an organism that uses anaerobic respiration?
Yeast cells
What fluid brings food and oxygen to cell?
Haemoglobin
How do the waste products get from the cells lungs to be extracted
Blood plasma
In which part of plants does the most photosynthenis take place?
Leaves
Name chemicals that is necessary for photosynthesis
Carbon dioxide
Name the organelle where photosynthesis take place
Chromoplast
Define the term conservation
Conservation is the protection of plants, animals and natural areas from the damaging effects of human activity.
Why is human population increasing
Due to increased food supply and better medicine
Name and explain 2 ways we can increase the food supply
- Convert more natural ares to farmland-undesirable as it leads to biodiversity loss
- Improve yield of crops-by genetic engineering/selective breeding to develop drought
resistant,improve size and taste,improve disease resistance,etc.
Name and explain 2 ways we can increase the food supply
- Convert more natural ares to farmland-undesirable as it leads to biodiversity loss
- Improve yield of crops-by genetic engineering/selective breeding to develop drought
resistant,improve size and taste,improve disease resistance,etc.
List 4 ways that we can overcome the food gap
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
List 4 causes of biodiversity loss
- Habitat loss/fragmentation:eg cutting down all or large parts of forest
- Invasive species:eg grey squirrel,Japanese knotweed
- Over exploration:eg overfishing
- Pollution by humans adding harmful minerals to the environment:eg sewage,oil,acid rain
How can we conserve biodiversity
- Reduce pollution (reduce,reuse,recycle)
- Rewild/plant new forest with native species
- Develop national parks/special areas of conservation
composting examples
Brown bin collection, compost heap at house
Negatives of a landfill
Leaks toxins,undesirable,smelly,litter,vermin
Define the term incinerator and explain what it does
It’s the burning of waste at a height temperature and it reduces landfill and generates electricity
List 5 benefits of a healthy ecosystem
- Clean water supplies
- Greater biodiversity
- Sources of wood/food/medicine
- Less pollution+soil erosion+flooding
- Recreation/ecotourism
Named chemical equation for photosynthesis
Carbon dioxide plus water equals glucose plus oxygen
What is qualitative data
Qualitative is the study of the presence or absence of an organism
How are alveoli adapted for gas exchange
Alveoli have a very large surface area to enable more diffusion of oxygen into the blood from the alveoli, and more carbon dioxide out of the blood into the alveoli
