Friday, May 26, 2017

Acid rain

Effect of acid rain on plants and trees is Dead or dying trees are a common sight in areas affected by acid rain. Acid rain leaches aluminum from the soil. That aluminum may be harmful to plants as well as animals. Acid rain also removes minerals and nutrients from the soil that trees need to grow. The trees are then less able to absorb sunlight, which makes them weak and less able to withstand freezing temperatures.

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.