Challenger Series: Challenge Questions

Question 1

Which of these is not a unit of length: meter, kilometer, cubic
centimeter, or millimeter?

Answer 1

Cubic centimeter

Question 2

. Of these options, which is the most specific category of biological
classification: genus, species, domain, or phylum?

Answer 2

Species

Question 3

3. Which part of the atom helps determine its atomic number?

Answer 3

Proton, more specifically, the number of protons in its nucleus.

Question 4

4. Which color of visible light has the lowest frequency?

Answer 4

Red

Question 5

. Which of these substances has the lowest pH: bleach, water, baking
soda, or lemon juice?

Answer 5

Lemon juice (it is the most acidic)

Question 6

. During its circulation throughout the body, blood from the left
ventricle then goes to which of these locations: aorta, right atrium, left
atrium, or pulmonary artery?

Answer 6

Aorta
The left ventricle pumps oxygenated blood into the aorta, which is the main
artery that distributes blood to the rest of the body.

Question 7

7. What blood type is considered the universal recipient?

Answer 7

AB+
People with type AB+ blood are universal recipients because they have no
antibodies to A, B or Rh in their blood and can receive red blood cells from a
donor of any blood type.

Question 8

8. In scientific notation, 20,000 + 3,400,000 = ?

Answer 8

3.42 × 10^6

Question 9

On a math test, 12 students earned an A. This number is exactly 25% of
the total number of students in the class. How many students are in
the class

Answer 9

48

Question 10

Adam tried to compute the average of his 7 test scores. He mistakenly
divided the correct sum of all of his test scores by 6, which yielded 84.
What is Adam’s correct average test score?

Answer 10

72