Chemistry I
Na
What is this element?
Sodium
Rusting of metal requires air and ____________.
water
Sound cannot travel through ____________
vacuum
This vessel has valve
Vein
This organ will contract when you breath in...
Diaphragm
Ar
What is this element?
Argon
Carbonate salt + acid --->
metal salt + carbon dioxide + water
The higher the ___________, the higher the pitch.
frequency
The composition of blood
55% =
44% =
1% =
55% = plasma
44% = red blood cells
1% = white blood cells and platelets
This specialised cells will sweep mucus along the airway
Ciliated epithelial cells
How do you separate alcohol from water?
Distillation
When phenolphthalein is added into potassium hydroxide, the colour of the indicator will change from ____________ to _______________.
Colourless, pink
By increasing the number of complete waves (hertz) will increase also the amplitude. True or false?
False
Fertilisation happens at ______________ and implantation happens at ________________.
oviduct/Fallopian tube, uterus
Gaseous exchange happens at __________
alveolus
Explain diffusion
The spreading out of particles from high concentration region to low concentration region
NaOH + H2SO4 ---->
Sodium Sulfate + Water
Na2SO4 + H2O
A light the split through a prism is passed through a magenta filter followed by a red filter. What colour can you see on the white screen?
Red
double circulatory system
A sperm cell has many ____________ so that it can get energy from aerobic respiration
mitochondria
This element is mixed with tin and oxygen to form a very special material that is transparent and can conduct electricity. It is used to make touchscreens on electronic devices. What is this?
Indium
Describe the test for hydrogen gas.
Use burning wooden splinter
'Pop' sound can be heard
Where can you find 'mashrabiya' windows?
India & Middle East
The flow of the blood of the following is true/false?
Lung --> pulmonary artery --> left atrium --> left ventricle --> aorta --> whole body --> vena cava --> right atrium --> right ventricle --> pulmonary vein --> lung
False
The gestation period for an elephant is __________
22 months