Grade 9- Science Quiz Bee

1. What is the main function of the respiratory system?

• a. to provide oxygen and remove carbon dioxide from the body.

• b. to bring oxygen to the body.

• c. to break down food and absorb nutrients.

• d. to remove oxygen from the body and deliver carbon dioxide.

Oceans cover about how much of the earth's surface?

• 71%

• 80%

• 65%

• 78%

What is the chemical name for table salt?

• Sulfuric Acid

• Sodium Chloride

• Ammonium Nitrate

• Hydrochloric Acid

A trait that is being masked of another trait.

• heterozygous

• dominant trait

• recessive trait

• homozygous

________is the study of the physical, chemical, and biological features of the ocean, including the ocean’s ancient history, its current condition, and its future.

• hydrology

• oceanology

• geology

• analogy

These are the ways to improve water quality.

• Always keep paved surfaces clean

• Reduce use of fertilizer

• Capture and filter your runoff

• Always use fertilizers

Which of the following are the man-made causes of extinction?

• Habitat destruction

• Spread of Invasive species

• Commercial hunting

• Pollution caused by human activities

These are the sources of water pollution.

• Agricultural practices like excessive additional of fertilizer.

• Deliberate disposal of domestic waste at point sources such as landfills and septic tanks.

• Litter consisting of plastic items, wrappers, garbage thrown directly in creeks, lakes, and rivers.

• Reduce use of fertilizers.

Why does this the t-shirt appear red and the shorts appear blue?

• The t-shirt reflects red light, the shorts reflect green light, other colors are absorbed.

• The t-shirt reflects red light, the shorts absorb yellow light, all other colors are reflected.

• The t-shirt reflects red light, the shorts reflect blue light, other colors are absorbed.

• The t-shirt reflects blue light, the shorts reflect red light, other colors are absorbed.

A force of 10N acts on a body of mass 20KG for 10 seconds. The change produced in momentum is given by:

• 5kg m/s

• 200kg m/s

• 100kg m/s

• 2000kg m/s