ANSWER THE FOLLOWING
When you increase your depth under water, the water pressure on your body
increases
objects that are smooth have LESS friction than objects that are rough
True
The tyres of tractor rolling. Rear tyres are broader because
Broader tyres lessen the pressure on ground.
Displacement reaction means
a more reactive metal displaces a less reactive metal from its compound
Where would you find the largest pressure?
At the bottom of the ocean
calcium is more reactive than iron. What will be produced when calcium sulphate and iron are mixed together?
no reaction happens so the reactants stay the same
What decreases as you go up in the atmosphere?
Air Pressure
Able to be drawn into wire is
ductile
Why won't you sink in mud if you wear boots?
Because the surface area is larger creating less pressure.
What is formed when sodium reacts with water?
sodium hydroxide and hydrogen
What is the instrument that measures air pressure called?
Barometer
Processes by which coal is formed-
Carbonisation
How do you Calculate Pressure
Force(N)/Area(m2)
The metal which can be cut with knife.
Sodium
Gas which occurs above the petroleum oil trapped under the rocks is
Natural Gas
When metal reacts with liquid water the products are...
metal hydroxide and hydrogen gas
Wheels of a shopping cart experience-
Rolling Friction
Renewable resources ...
are never going to run out
Which of these animals would probably cause the greatest pressure on the ground?
A fat cow with small feet
The chemical symbol for iron
Fe
What are the most common sources of energy used in automobiles?
Petroleum and diesel
Sliding friction is when two _____________ surfaces slide over one another.
SOLID
Friction is a force that acts in an ___________ direction of movement.
opposite
Magnesium reacts with oxygen to make
magnesium oxide / basic in nature
copper+carbon dioxide+water+oxygen=copper hydroxide+______________
copper carbonate