NeSA NeSA Science 2

Question 1

According to Newton's First Law of Motion, what will a moving object do if no unbalanced force acts upon it?

Accepted Answer

Continue moving in a straight line at constant speed

Answer

Gradually slow down and stop

Answer

Accelerate in its direction of motion

Answer

Change direction randomly

Question 2

Which process in the water cycle describes liquid water changing into water vapor due to heat energy?

Accepted Answer

Evaporation

Answer

Condensation

Answer

Precipitation

Answer

Transpiration

Question 3

What is the difference between a physical change and a chemical change in matter?

Accepted Answer

Physical changes change only the form or appearance; chemical changes produce a new substance

Answer

Physical changes alter the chemical composition; chemical changes only change shape

Answer

Both types of changes produce new substances with different properties

Answer

Physical changes cannot be reversed; chemical changes always can be reversed

Question 4

Which term describes the passing of traits from parent organisms to their offspring through genes?

Accepted Answer

Heredity

Answer

Adaptation

Answer

Evolution

Answer

Natural selection

Question 5

On the pH scale, a substance with a pH of 2 is best described as which of the following?

Accepted Answer

Strongly acidic

Answer

Strongly basic

Answer

Neutral

Answer

Weakly acidic

Question 6

What is the role of decomposers such as fungi and bacteria in an ecosystem?

Accepted Answer

Break down dead organic matter and return nutrients to the soil

Answer

Convert sunlight into food for other organisms

Answer

Prey on herbivores to control population

Answer

Compete with plants for water and sunlight

Question 7

Which type of wave requires a physical medium (such as air, water, or solid material) to travel through?

Accepted Answer

Mechanical wave

Answer

Electromagnetic wave

Answer

Radio wave

Answer

Light wave