BECE Science 5

Question 1

Which of the following best describes a food chain?

Accepted Answer

A sequence showing how energy flows between organisms

Answer

A food chain shows the linear transfer of energy from one organism to the next, starting with a producer and ending with a top consumer.

Question 2

What is the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

Answer

The atomic number is the number of protons in an element's nucleus and uniquely identifies each element on the periodic table.

Question 3

Which phenomenon explains why a straw appears bent when placed in a glass of water?

Accepted Answer

Refraction

Answer

Refraction occurs when light changes speed as it crosses the boundary between air and water, bending the light rays and making the straw appear bent.

Question 4

What is the main source of energy for the Earth's weather systems?

Accepted Answer

Solar radiation from the Sun

Answer

Solar radiation from the Sun drives weather patterns by heating the atmosphere and oceans unevenly, causing air and water movement.

Question 5

Which of the following represents a balanced chemical equation?

Accepted Answer

2H₂ + O₂ → 2H₂O

Answer

2H₂ + O₂ → 2H₂O is balanced because it has 4 hydrogen atoms and 2 oxygen atoms on both sides of the equation.

(BECE) Basic Education Certificate Examination Practice Test