Achievement Test Standardized Achievement Science 3

Question 1

Which type of wave requires a medium to travel through?

Accepted Answer

Mechanical waves

Answer

Mechanical waves, such as sound, need a physical medium (solid, liquid, or gas) to propagate.

Question 2

In the periodic table, elements in the same column (group) share which characteristic?

Accepted Answer

The same number of valence electrons

Answer

Elements in the same group have the same number of valence electrons, giving them similar chemical properties.

Question 3

A food web shows that rabbits eat grass and foxes eat rabbits. If the rabbit population greatly decreases, what most likely happens to the fox population?

Accepted Answer

It decreases

Answer

With fewer rabbits as prey, foxes have less food, causing their population to decline.

Question 4

What is the atomic number of an element?

Accepted Answer

The total number of protons in the nucleus

Answer

Atomic number equals the number of protons in an atom's nucleus and uniquely identifies each element.

Question 5

Which property of light 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 passes from one medium to another, bending its path.

Achievement Test Practice Test

Achievement Test Practice Test

Achievement Test Standardized Achievement Science 3