BECE Science 3

Question 1

What is the process by which a liquid changes into a gas at its boiling point?

Accepted Answer

Vaporization

Answer

Vaporization (specifically boiling) is the process by which a liquid rapidly changes to a gas when heated to its boiling point.

Question 2

Which organ is primarily responsible for filtering waste from the blood?

Accepted Answer

Kidneys

Answer

The kidneys filter waste products and excess substances from the blood to produce urine, which is then excreted.

Question 3

What is the SI unit of force?

Accepted Answer

Newton

Answer

The Newton (N) is the SI unit of force, defined as the force needed to accelerate a 1 kg mass at 1 m/s².

Question 4

Which of the following is an example of a chemical change?

Accepted Answer

Wood burning

Answer

Burning wood is a chemical change because it produces new substances (ash, carbon dioxide, water vapor) that cannot easily be reversed.

Question 5

How many chromosomes do normal human body cells contain?

Accepted Answer

46

Answer

Normal human somatic (body) cells contain 46 chromosomes arranged in 23 pairs.

(BECE) Basic Education Certificate Examination Practice Test