SEMESTER 1 SCIENCE REVISION
1. What is respiration?
A series of chemical reactions that happens inside every living cell.
2. What are the parts of the respiratory system that air passes through as you breathe in?
Nose  Trachea (Windpipe)  Bronchus  Brochiole  Air sac (Alveolus)
3. What do red blood cells carry?
Red blood cells carry oxygen.
4. When you breathe in, how do your ribs move?
The ribs move upward.
5. When the intercostal muscles contract, how does this cause the ribs to be pulled?
They are pulled upwards and outwards.
6. The respiration equation:
Glucose + Oxygen  Carbon dioxide + water
(Reactants)
(Products)
7. Which part of blood is blood plasma?
It’s the liquid.
8. Red blood cells are very unusual . They do not have a nucleus and they do not have
mitochondria. They are full of a red pigment called haemoglobin . Oxygen from the alveolus
diffuses into red blood cells in the capillaries, and oxyhaemoglobin is formed.
9.
The mass of solute + the massof solvent  the mass of the solution
10.
Dissolving (hòa tan)
- sugar + black tea
Melting (tan chảy)
-
- medicine tablet (e.g. efferalgan) + water -
a chocolate bar left out in the sun
gold heated up VERY hot to mould into a ring
11. What is the different between dilute and concenstrated?
Dilute: contains less particles of solute
Concentrated: contains more particles of solute
12. When you keep adding solute and no more solute will disolve, what is the solution called?
The solution is saturated.
13. When the solubility increases, what does the temperature do?
The temperature increases.
14. What kind of ink is soluble in water?
Water based markers.
15. In which direction does diffusion work?
From where there are more particles to where there are less of them (= from higher
concentration to lower concentration)
16. How do particles in a gas move?
They move randomly.
17. When the concentrations of two gases in a container are equal, what happen to the diffusion?
Diffusion stops.
18.
The variables that you keep the same
Control variables
The variable that you measure
Dependent variables
The variable that you change
Independent variables
The variable that you measure
Interval
The highest and lowest numbers
Range
All of the things that could affect the results of an
Variables
experiment
19.
The resulting picture after you carry out chromatography Chromatogram
Special paper, a bit loke filter paper
Chromatography paper
A technique used to separate out coloured inks
Paper chromatography
The edge of the solvent that moved up the paper
Solvent front
20. A non-moving object can begin to move if the forces are?
When the forces are unbalanced
21.
Balanced
- a coffee cup sitting on the teacher's desk
- the ISS (International Space Station)
orbiting the Earth
Unbalanced
- a skateboarder speeding faster and
faster down a ramp
- a ping-pong ball as Le Vinh
smashes it forcefully with his bat
22. What are the definition, equation and standard unit of speed?
Speed: The distance an object travels per unit of time
Speed = Distance / Time
metres per second (m/s)
23.
Total distance divided by total time
The average speed
A value that does not change
Constant
A graph with time on the x-axis (horizontal axis) and
Distance – time graph
distance on the y-axis (vertical axis)
Not moving
Stationary
24. What do a horizontal line on a distance-time graphs tell us about?
The object is stationary / at rest
25. What are the equation and unit of moment?
Moment = force x distance
Newton metre (Nm)
26. In order to balance a see-saw, what must the moments on both sides of the pivot be?
The moments must be opposite
27. What is the equation and unit of pressure?
Newton per metre squared (N/m 2)
Pressure = Force / Area
28. In order to increase pressure, what could you do?
- Decrease the size of the container
- Increase the temperature
29. Where is atmospheric pressure highest?
At sea level (mực nước biển)
30.
A kind of sugary fluid found in flowers
Nectar (mật hoa)
A kind of dust used for reproduction
Pollen (phấn hoa)
31.
Muddy roots (rễ bùn)
Mangrove forest (rừng ngập mặn)
Ice floes (tảng băng)
Sea ice in the Arctic
Irrigation canals (kênh mương thủy lợi)
Rice paddy (ruộng lúa)
Burrows (hang thỏ)
The Sonoran desert
32. According to your book, where did most bird species native to New Zealand make their
nests?
They make their nests in the ground.
33. Descriptions of the terms
Completely get rid of
Eradicate (diệt trừ)
None left in existance
Extinct (tuyệt chủng)
Still in existence
Extant
An "alien"
Invasive (kẻ xâm lăng)
A species that has evolved naturally in a certain place
Native
A species that only exists in one place
Endemic (đặc hữu)
34. What is DDT? What can break down DDT?
- DDT is an insecticide
- Decomposers can break down DDT
35. What are sub-atomic particles?
Particles that are smaller than atoms.
36. Where is the Large Hadron Collider?
Switzerland
37. Seawater is a mixture . It contains about 96.5% water and 3.5% salts.
38. Diamonds are mostly carbon atoms. Which elements, when mixed with the carbon, cause the
diamonds to be a certain colour?
Colourless and translucent
Pure carbon (no other elements)
Yellow
Nitrogen
Blue
Boron
Green
Nitrogen, nickel and hydrogen
39.
The study of climate
Climatology
The study of weather
Meteorology
How far you can see, it depends on atmospheric
Visibility (hiển thị)
conditions or darkness
The amount of water vapor in the atmosphere
Humidity (độ ẩm)
40.
A period in the earth's history when polar and mountain
Glacial period
ice sheets were unusually extensive across the earth's
(thời kỳ băng hà)
surface.
A period of warmer climate that is characterized by the
Interglacial period
retreat of glaciers but there is permanent ice close to the (thời kỳ gian băng)
North and South Poles
A period of extremely cold temperatures when part of
Ice age
the planet's surface was covered with massive ice
(kỷ băng hà)
sheets.
41. What must be present during an ice age?
Permanent ice on some parts of the planet.
42. Which gas have humans been producing for the past 200 years?
Carbon dioxide
43. What is warming that results when solar radiation is trapped by the atmosphere?
The greenhouse effect