Science Practice Quiz 246

Q1.What is the effect of unburnt carbon particles in the air?

A. They are harmless B. They are beneficial C. They are dangerous pollutants causing respiratory problems D. They are rare

Q2.What is the result of incomplete combustion of a fuel?

A. It produces oxygen B. It produces carbon dioxide C. It produces poisonous carbon monoxide gas D. It produces water

Q3.What is the effect of increased percentage of carbon dioxide in the air?

A. It has no effect B. It reduces global warming C. It has been linked to global warming D. It increases the oxygen level

Q4.What is the effect of oxides of sulphur and nitrogen produced by the burning of coal, diesel, and petrol?

A. They produce oxygen B. They reduce pollution C. They cause acid rain which is harmful for crops, buildings, and soil D. They have no effect

Q5.What happens when vinegar is poured into a dish of baking soda?

A. The candles are extinguished due to the lack of oxygen B. The candles burn more brightly due to the increased oxygen C. A foaming reaction occurs and the candles are extinguished D. The baking soda and vinegar mixture catches fire

Q6.What is the purpose of the activity involving baking soda and vinegar in the source text?

A. To demonstrate the combustion reaction B. To show the effect of acid on a base C. To model a fire extinguisher and demonstrate its working D. To compare the reactivity of different acids

Q7.What is the recommended website to visit for more information on combustion?

A. http://en.wikipedia.org/wiki/combustion B. lwww.newton.dep.anl.gov/askasci/chem03/chem03767.htm C. Both of the above D. Neither of the above

Q8.What is the result of the increase in temperature on the earth due to global warming?

A. Increase in rainfall B. Decrease in water cycle C. Disturbance in water cycle and reduction in rainfall D. No effect on water cycle

Q9.What is the effect of deforestation on soil properties?

A. Increase in fertility B. No change in soil properties C. Decrease in soil erosion D. Change in physical properties of the soil

Q10.What is the process by which water moves from the soil surface into the ground?

A. Evaporation B. Infiltration C. Transpiration D. Condensation

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Science Practice Quiz 246