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Ninth Grade (Grade 9) Science Questions

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Grade 9 Oceanography and Hydrology
Grade 9 DNA, RNA, and Genetics
Suppose each body cell of animal A has 50 chromosomes, each sperm of animal B has 26 chromosomes, and each egg of animal C has 25 chromosomes. Which statement is true?
  1. Animals A and C could be the same animal.
  2. Animal A has the most chromosomes overall.
  3. Animal C has the most chromosomes in its body cells.
  4. Animals B and C are probably the same kind of animal.
Grade 9 DNA, RNA, and Genetics
What is the function of mRNA?
  1. to match up with mRNA and capture an amino acid
  2. to glue together all the amino acids into a polypeptide chain
  3. to carry the DNA that goes from the nucleus to the cell membrane
  4. to take the information from the DNA in the nucleus to the ribosomes
Grade 9 Solvents, Solutes, and Solubility
Grade 9 Microbiology
What uses conjugation to share genetic material?
  1. viruses
  2. archeae
  3. starfish
  4. bacteria
Grade 9 Stars
What is a theoretical object that absorbs all radiation and is a perfect emitter?
  1. Emitterator
  2. Absorperator
  3. Diffraction Grating
  4. Blackbody
Grade 9 DNA, RNA, and Genetics
Which mutation is exclusive to a chromosome?
  1. point
  2. silent
  3. deletion
  4. frameshift
Grade 9 Organic Chemistry
Which of the following is NOT TRUE about Carbon atoms?
  1. A carbon atom has four valence electrons and can form four covalent bonds.
  2. Carbon atoms are not found in organic molecules
  3. Carbon atoms can form bonds with other carbon atoms to make many different structures.
  4. Carbon atoms can form double and triple bonds.
Grade 9 Solvents, Solutes, and Solubility
Which is the best example of a solution?
  1. blood
  2. milk
  3. salt dissolved in water
  4. oil and vinegar mixed for salad dressing
Grade 9 Circulatory and Immune Systems
What is the purpose of platelets in the blood?
  1. produce hemoglobin
  2. make new blood cells
  3. regulate the blood temperature
  4. slow down blood flow through damaged blood vessels
Grade 9 Atmosphere
What is a circular pattern of updrafts, downdrafts, and wind?
  1. Weather pattern
  2. Convection cell
  3. Coriolis effect
  4. Isobar
Grade 9 Sun
Who among the following first proposed a heliocentric model of the solar system?
  1. Galileo Galilei
  2. Nicolaus Copernicus
  3. Ptolemy
  4. Tycho Brahe
Grade 9 Solvents, Solutes, and Solubility
Grade 9 Earth's Layers
Grade 9 Environmental Science
Grade 9 Atmosphere
Grade 9 Zoology
The appendages of arthropods are
  1. hard and immovable.
  2. found only on the head.
  3. divided into six branches.
  4. jointed and extend from the body wall.
Grade 9 Taxonomy
In binomial nomenclature, which of the two terms is capitalized?
  1. the first term only
  2. the second term only
  3. both the first and second terms
  4. neither the first nor the second term
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