Third Quarter Examination in Physical Science

Which of the following theories explained the origin of the universe and was accepted by most scientists?

• Nebular Theory

• Big Bang Theory

• Steady State Theory

• Pulsating universe

Who introduced the concept that matter is composed of tiny “uncuttable” particles called atom?

• Leucippus

• Democritus

• John Dalton

• Antoine Lavoisier

What branch of Science that deals with compositions and structures of any substance or chemical that can or may use to prolong life and maintain body nourishment of any living organisms?

• Physics

• Chemistry

• Biology

• Biochemistry

Which of the following best describes matter?

• It has weight.

• It has a volume and mass.

• It is a form of energy.

• It has and indefinite shape and space.

Which of the following statements defines an atom?

• A basic building blocks of matter

• A particle of matter that uniquely defines a chemical element

• It consists of central nucleus that is surrounded by one or more electrons

• All of the above

What were the first elements formed, a few seconds after the huge explosion causing the birth of universe?

• helium and iron

• iron and carbon

• oxygen and hydrogen

• helium and hydrogen

Which of the following is NOT an isotope of hydrogen?

• Deuterium

• Protium

• Tritium

• Yttrium

Which of the following statements is TRUE?

• Stars twinkle every night

• Our sun is the biggest star in the universe

• The bluish star has the hottest temperaturpe

• All the stars in the universe end up to black hole formation

Which of the following stage is the beginning of the new born star or the youngest star?

• protostar

• polaris

• pulsars

• ceris

All stars start from a large cloud of gas and dust. Based on the picture at what stage when the gravity pulls at the center to form the nebula?

• A

• B

• E

• F