Thursday, February 2, 2017
The effect of gravity on speed
-put the ramp against the seat of a chair.Place the ramp and chair so that the ramp points towards the hallway.Have your teammate on the other endd of the hallway.
-place the ball bearing at the top of the ramp.
-lift the ramp 20 cm and release the ball bearing
-time how long it takes to travel 5 metres
-see how far it will go
-repeat the experiment three times for each height then do 40 cm, 60 cm and 80 cm
HEIGHT TIME TO TRAVEL DISTANCE TRAVELLED
20 4.72 sec 5 m. 90 cm.
40 8.78 sec 5 m. 60 cm.
Wednesday, November 16, 2016
Causes of Acid Rain
The SO and NO react with water, oxygen and other chemicals to form sulfuric and nitric acids.These then mix with water and other materials before falling to the ground.
Effect of Acid Rain
Cure of Acid Rain
Use of alternative sources of energy, decreasing energy consumption and using alternative forms of transport. Acid rain results from the deposition of nitrogen oxides and sulfur dioxide in the atmosphere, which occurs when fossil fuels are burned.
Thursday, September 1, 2016
Thursday, August 25, 2016
SYMBIOSISSymbiosis: This comes from a Greek word simply meaning 'living together' and can be used to describe any association between two organisms.
Mutualism: This can be used to describe an association in which both organisms apparently benefit
Example: relationship between bullhorn acacia trees and certain species of ants.
Parasitism In this association one organism benefits, and the other is adversely affected. This description would also fit the relationship between a carnivore and its live prey and a herbivore and the plant it feeds on, especially if they are very specialized in the food they eat.
Example:Fleas and mosquitoes feed on blood from other organisms.
Commensalism is a type of relationship where one of the organisms benefits greatly from the symbiosis. The other is not helped but is not harmed or damaged from the relationship. In other words, this is a one-sided symbiotic relationship.
Example: the relationship between cattle egrets and cattle.