NTN Science

Question 1

What is the basic unit of life?

Accepted Answer

Cell

Answer

Organ

Answer

Tissue

Answer

Molecule

Question 2

Which of the following is a function of the human skeletal system?

Accepted Answer

Providing structure and protecting internal organs

Answer

Producing hormones

Answer

Filtering blood

Answer

Absorbing nutrients

Question 3

Which element is essential for human red blood cells to carry oxygen?

Accepted Answer

Iron

Answer

Calcium

Answer

Potassium

Answer

Sodium

Question 4

What process do plants use to convert sunlight into food?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Fermentation

Answer

Digestion

Question 5

Which of the following correctly describes the difference between a physical change and a chemical change?

Accepted Answer

A chemical change creates a new substance; a physical change does not

Answer

A physical change creates a new substance; a chemical change does not

Answer

Both changes create new substances

Answer

Neither change alters the substance

Question 6

Which body system is primarily responsible for transporting oxygen and nutrients to cells?

Accepted Answer

Circulatory system

Answer

Digestive system

Answer

Nervous system

Answer

Endocrine system