2ND MIDTERM EXAM (HELE 6)

__________ are erect plants with a single woody stem, and it plays a very important role in our ecological balance.

• Flower

• Tree

• Fruit

• None of the above

Trees take in _____________from factories and motorized vehicle emissions.

• oxygen

• carbon dioxide

A substance in the air that is given- off by trees and is beneficial to human beings.

• oxygen

• carbon dioxide

This is one of the products of trees made from fiber and harvested from wood pulp.

• paper

• rubber

• turpentine

• none of the above

The root system of the trees holds water in the soil that prevents ____________.

• oxygen

• carbon dioxide

• soil erosion

• all of the above

Trees are valuable to people and the community. Which of the following is not a product from trees?

• Fiber to produce pulp and paper

• Food like fruits, vegetables, and nuts

• wood used as fuel for cooking and heating

• Chemical products such as pesticide and insecticide

Trees can be a source of medicine.

• TRUE

• FALSE

Trees and fruit-bearing trees cause water pollution.

• TRUE

• FALSE

Which of the following explain the benefit that people get from planting trees?

• It can cause good health.

• It can be a source of income.

• It can be an additional source of food.

• All of the above

Why do people plant trees?

• To increase the income

• To increase problem

• To increase headache

• To increase sickness