week 9th

?
Explain the conditions on the underside and top of a leaf?
Wet on the underside because there are stomata Dry of the top because there are no stomata
1 of 47
Name the cell structure where anaerobic respiration takes place?
Cytoplasm
2 of 47
What is the role of the pulmonary artery?
Takes blood to the lungs
3 of 47
What is the role of the pulmonary vein?
Brings blood into the heart from the lungs
4 of 47
What is the role of the aorta?
Main artery taking blood to the body
5 of 47
Where in the heart are the pacemaker cells found?
Right atrium
6 of 47
How do nitrate ions help the plant to grow?
Uses glucose to form amino acids which synthesise proteins.
7 of 47
How is antibiotic resistance caused?
Random mutations in their DNA can lead to changes in the bacteria’s characteristics eg by being less affected by a particular antibiotic.
8 of 47
How can we stop antibiotic resistance becoming worse?
• Doctors only prescribing drugs when they really need to • Take all of the antibiotics a doctor prescribes you.
9 of 47
What does a food chain show?
Energy transfer
10 of 47
Problems deforestation causes?
• Less carbon dioxide taken in • More carbon dioxide in the environment • Less biodiversity
11 of 47
What are peat bogs?
A unique ecosystem that has adapted to grow in these extreme conditions and form over thousands of years from plant material that cannot fully decay because the conditions are too acidic and there is a lack of oxygen.
12 of 47
How are peat bogs used?
They are burnt by gardeners to improve the properties of the soil which benefits crop production but causes large amount of carbon dioxide to be released into the atmosphere.
13 of 47
What name is given to microorganisms that can survive in extreme conditions?
Extremophiles
14 of 47
Explain what is meant by a stable community?
Where all the species and environmental factors are in balance so that population sizes remain constant
15 of 47
What is the test for a pure substance?
Boiling point – At a specific temperature
16 of 47
What do we call water that is safe to drink?
Potable
17 of 47
What are the main stages of water treatment?
• Filter – To remove solids • Add chlorine – To kill microbes
18 of 47
What are alternatives to chlorine?
• Ultraviolet light • Ozone
19 of 47
If a country does not have enough fresh water they may desalinate what they do by?
• Distillation • Reverse Osmosis
20 of 47
What does sewage treatment involve?
• Screening and grit removal • Sedimentation to produce sewage sludge and effluent • Anaerobic digestion of sewage sludge which can be turned into: Fertilisers, biogas, solids fuel or landfill • Aerobic biological treatment of effluent which is then
21 of 47
What is a high-grade ore?
Contains a large amount of the metal compound
22 of 47
What is the main method of extracting from low-grade ores?
Add acid to form a soluble salt solution. Then use either electrolysis or displacement with scrap iron.
23 of 47
What is bioleaching?
This uses bacteria which we grow on large areas of land. The bacteria produce a solution called a leachate which contains copper ions. We then use scrap iron or electrolysis.
24 of 47
What is phytomining?
This uses plants. The plants absorb the metal as they grow. The plants are then burned. We add acid to the ash to make a solution of copper ions. Then use displacement or electrolysis.
25 of 47
Define the term carbon footprint?
A measure of the amount of carbon dioxide and other greenhouse gases released over the full life cycle of something.
26 of 47
1 dm3
1000cm3
27 of 47
In what order did scientists arrange elements in the early periodic table?
In order of atomic weights
28 of 47
In what order do scientists arrange elements in the periodic table today?
In order of atomic number
29 of 47
How did Mendeleev overcome the issue that some elements were placed in the wrong groups?
He left gaps for undiscovered elements
30 of 47
Explain why Mendeleev’s theory was accepted?
• He left gaps • He predicted properties • When we discovered elements, they matched his predictions
31 of 47
How are oxides of nitrogen produced in a car engine?
Oxygen and nitrogen react in the high temperatures of the car’s engine
32 of 47
Explain how paper chromatography separates dyes in a food colouring?
Each dye will only travel specific distances up the chromatography paper. The dyes are distributed differently between the mobile and stationary phase.
33 of 47
Explain how the student could tell there was more than one dye?
There were multiple coloured dyes in a vertical line
34 of 47
What is sustainable?
Providing for today’s generation while preserving resources for future generations.
35 of 47
Explain the greenhouse effect?
Shortwave radiation comes in from the sun with more energy. This is reemitted as longwave radiation. This is absorbed by greenhouse gases.
36 of 47
What is the left-hand rule?
Thumb = Force / First finger = Direction of magnetic field / Second finger = Current
37 of 47
What is the relationship between mass and weight?
Mass and weight are directly proportional. Increasing the mass of an object also increases its weight.
38 of 47
What does uniform acceleration mean?
Constant Acceleration
39 of 47
What is acceleration near Earth’s surface?
9.8m/s2
40 of 47
When will an object reach terminal velocity?
As the speed of an object increases the friction builds up gradually reducing the acceleration until eventually the frictional force is equal to the accelerating force (meaning the resultant force is 0). It will have reached its maximum speed or term
41 of 47
What are induced magnets?
Magnetic materials that turn into a magnet when they’re put into a magnet field
42 of 47
What are permanent magnets?
Produce their own magnetic field
43 of 47
What is the Right-Hand Thumb Rule?
Thumb – Current / Curled fingers – Magnetic Field
44 of 47
What happens to the temperature of the brakes when applied?
Brake pads make contact on the wheel causing friction, resulting in work to be done. Wheels transfer energy from the kinetic energy store of the wheels to thermal energy.
45 of 47
What is a closed system?
The net change in the energy of the system is always zero
46 of 47
Name a detector that could be used to measure the count rate?
Geiger and Muller Counter
47 of 47

Other cards in this set

Card 2

Front

Name the cell structure where anaerobic respiration takes place?

Back

Cytoplasm

Card 3

Front

What is the role of the pulmonary artery?

Back

Preview of the front of card 3

Card 4

Front

What is the role of the pulmonary vein?

Back

Preview of the front of card 4

Card 5

Front

What is the role of the aorta?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar All resources:

See all All resources »See all All resources »