This is a scientific approach to seeking knowledge that involves forming and testing a hypothesis and used to answer questions in a wide variety of disciplines.

He first introduced the two key concepts of taxonomy: classification of organisms by type and binomial definition. Therefore, the founder of taxonomy is ______.

Air pollutants are produced chiefly by _____.

What organism is known as a natural genetic engineer?

Which of the following is INCORRECT about the Philippine Nanotechnology R & D Roadmap?

A forest suffered from wildfires and destroys the existing vegetation; however, the soil remained viable. Five years later trees and bushes are seen flourishing in the forest once again. This phenomenon is called ______.

All are characteristics of mammals, EXCEPT:

The thinning of ozone layer is due to the use of _____.

What is the product of biotechnology that has existed even before industrial age?

He is widely regarded as the "father of modern astronomy".

The Philippines lies in the _____, an area where many volcanoes are active.

Species is the ______ category in the classification of plants and animals.

Scorching of tongue on a hot coffee is an example of heat transfer through _____.

Carbohydrates such as glucose and starch are classified as:

Animals that feed only on plants are called:

The hair-like structures in cells that help in locomotion are called:

Which is an example of biotechnology application?

All of the following are physical properties EXCEPT _____.

Which microaerophilic protist can cause amoebic dysentery in humans?

The following describes chemical change EXCEPT _____.

Which of the following is the primary reason why scientists repeat measurements they take during experiments?

All of the following are extensive properties EXCEPT _____.

All of the following are intensive properties EXCEPT _____.

Which of the following is NOT a common igneous rock?

Insecticides are used to control insect populations so that they do not destroy crops. However, overtime, a new insecticide has to be developed as they become less effective in killing the insects. Why?

The Kyoto protocol, which requires countries to reduce greenhouse emission, is a practice that advocates _____.

A group of organisms similar to one another that can interbreed is known to scientists as _____.

War experts use energy in its discovery of nuclear bombs. When energy is released from a nuclear fission, what occurs?

The joining of a detached living portion of a plant to the main stem of the same plant is called _____.

Mr. Santos ordered merchandise listed at ₱15,000.00 the invoice received showed the net price of ₱12,750.00. Find the discount rate.

Mr. Lazarus has incurred the following expenses on his trips to the Cebu islands: ₱3,200.00, ₱2,500.00 and ₱1,500.00; what percentage of this total monthly budget of ₱ 40,000.00 did he spend on this trip?

A red dress priced at ₱450.00 is marked 15% off. How much is the discount?

Shelia has a chess with length, width and height of 10 cm, 8 cm and 6 cm, respectively, its volume is _____.

Simplify (2x – 3y) + (y – 4z) – (z – 3x)

Karlo had an average of 70% in his first two tests and an average of 80% in his next three tests. The average for his five tests is _____.

What is the total amount after adding interest of 8% on ₱10,000,00 for three years?

If the ratio of the number of carabaos, pigs and cows in a farm is 5:1:2 and there are 48 animals in all, how many of them are pigs?

Simplify the following 4(x + 2) – 3(x – 7)

Ms. Borja is a saleslady who is paid 5% of whatever sales she makes every week. In a particular week, Ms. Borja made sales amounting to ₱30,000 and therefore her commission is _____.

The largest common factor of two or more numbers is called?

A rectanguļar block of iron has a dimension of 5 cm x 10 cm x 15 cm and weighs approximately 60 N. How should this block be placed on top of the table so as to exert the greatest pressure on the surface?

When raw scores are converted to percent, letter marks or number marks, the process is known as _____.

In mathematics, it is a multiplicative factor in some term of a polynomial, a series, or an expression; it is usually a number, but may be any expression.

Find the LCM of 8, 12 and 20.

In a photograph, Maria is 9 cm tall and her brother Trojan is 10 cm tall. Maria’s actual height is 153 cm. What is Trojan’s actual height?

How much was borrowed if the interest at 8% is ₱6,000 after 3 months is 76,000.00?

What is the amount due on ₱10,000.00 after adding the annual interest of 12% for 5 years?

Skyway company manufactures tables and chairs. In its catalogue a round table is priced at ₱6,000.00 less 15%. What will Katherine have to pay for the round table?

Which is the numeral for eight-six trillion, forty five million, seven hundred two?

The simple interest on ₱20,000.00 for 3 years at 9% annually is _____.

The greatest common factor of 138 and 414 is _____.

Find the least common multiple of 5, 2, 7.

Joan invested 120,000, part at 5% and the rest at 8% simple interest. After 1 year, she earned 8,400 interest. How much was invested at 8%?

How many liters of 50% solution must be mixed with 40 liters of 20% solution to make a 30% solution?

Solve the value of x to make the proportion x:8=4:16

A recipe for custard requires 4 eggs for every 8 cups of flour. The Baker has 32 cups of flour and so the baker will need eggs.

Performe the operation and reduce to simpliest form 3x - (2y - 4x) +6y

On a certain day, three computer technicians took turns in manning a 24 hrs internet shop. The number of hours Romeo, Chris Jan, and Aldrin, were on duty was in the ratio 3:4:5, respectively. The shop owner pays them 50 pesos per hour. How much would Aldrin receive for that day?

Carla is 6 years older than her sister. The sum of their ages is 34. How old is Carla?