NTN Science 3

Question 1

What is the chemical formula for water?

Accepted Answer

H₂O

Answer

CO₂

Answer

H₂O₂

Answer

NaCl

Question 2

Which layer of Earth's atmosphere contains the ozone layer?

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 3

Which of the following is an example of a conductor?

Accepted Answer

Copper wire

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 4

What is the role of the mitochondria in a cell?

Accepted Answer

Produce energy (ATP) through cellular respiration

Answer

Synthesize proteins

Answer

Store genetic information

Answer

Control what enters and exits the cell

Question 5

If a substance has a pH of 2, it is classified as:

Accepted Answer

Strongly acidic

Answer

Strongly basic

Answer

Neutral

Answer

Slightly basic

Question 6

Which of the following best describes the scientific method?

Accepted Answer

A structured process of observation, hypothesis, testing, and conclusion

Answer

A system for memorizing facts

Answer

A method for building instruments

Answer

A way to perform mathematical calculations