The most significant feature of the ancient atmosphere was the absence of __________.

Which of the following is the correct order of Earth's atmosphere?

What is the basis for the division of the layers of the atmosphere surrounding Earth?

Which of the following is not a constituent of the atmosphere?

Which two gases make up the majority of the earth’s gases?

In which layer do virtually all weather phenomena take place?

Which of the following is not true about Ozone?

Why is the presence of ozone above the troposphere is important for the survival of living things on Earth?

The Earth is called the blue planet because _____.

What two elements make up water?

What property of water is most important for living organisms?

Which property of water enables it to be an effective coolant?

Water is a good solvent because _____.

Which best explains why so little of the water on earth is available for human use?

Which of the following major processes are involved in the water cycle?

Which two sources of freshwater are used by municipalities for drinking water?

Temperature, turbidity, and suspended sediment are all

Macroinvertebrates such as stoneflies, mayflies and water boatmen require high levels of dissolved oxygen and their abundance is an indication of:

A measure of how suitable water may be for drinking

What two agriculture nutrients cause the greatest problems in surface waters? (lead to algae growth and depleted O2)

Soil quality is generally enhanced by greater __________.

Which of the following indicators of soil quality would be useful changes due to soil management over periods of just a few years?

Food production, carbon sequestration, water supply, disease mitigation, and habitat for diverse organisms are all examples of ________________.

Which statement(s) best characterize(s) shifting cultivation systems in use today?

Natural resources are materials or elements from the environmental that people __________.

What do you call a resource that people can use again and again but its supply can be replaced?

Which one is an example of a renewable resource?

Why are coal, petroleum and natural gas considered nonrenewable resources if they were produced from plant and animal remains?

Which of the following list of materials correctly match of which it was produced?

Many metal products and by-products we use everyday are derived from metal containing rocks called __________.

This mineral mined from rocks is very essential in everyday life use. It is very valuable in building construction, bridges, bodies of cars and the like.

Natural resources that cannot be replaced within one human generation once they are used up are called __________.

One of the most productive copper and gold producers in our country.

It refers to any one of a group of nations that harbor the majority of Earth's species and high numbers of endemic species.

The land area from which surface runoff drains into a stream, channel, lake, reservoir or other body of water. It is also called a drainage basin.

It means something that is found or belongs to a particular country

One of the major producer of nickel in our country.

Philippines  is said to have an estimated 21.5 billion tons of metal deposits enabling it to have what rank when it comes to gold reserves?

Which of the following is considered to be a rich fishing ground in our country?

Our country's rank in the world for mineral deposits.

The main purpose of conservation is to __________.

How can you help in the preservation of our ecosystem?

Which of these is NOT an example of how your community uses natural resources?

Which is a way we can protect our environment?

The process of using resources wisely is called?

To help conserve our environment, we must __________.

Which of the following is NOT a way to conserve natural resources?

Reduce, reuse and recycle can conserve our __________.

People should be banned to hunt in forest or collect wild plants to ensure protection of __________.

a.      Wildlife                                 b.    Ecosystem                  c.    Food chain                  d.    Food web

Which of the following is not a possible outcome of mismanaging forest resources?