Achievement Test Standardized Achievement Science 4

Question 1

Which part of the human digestive system absorbs most of the nutrients from food?

Accepted Answer

Small intestine

Answer

The small intestine is the primary site of nutrient absorption, aided by villi that increase surface area.

Question 2

What type of energy is stored in the chemical bonds of food?

Accepted Answer

Chemical (potential) energy

Answer

Food contains chemical potential energy stored in molecular bonds, which cells release through cellular respiration.

Question 3

Two forces of 10 N and 6 N act in the same direction on an object. What is the net force?

Accepted Answer

16 N

Answer

When forces act in the same direction, they add together: 10 N + 6 N = 16 N.

Question 4

Which gas makes up the largest percentage of Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Nitrogen (N₂) comprises approximately 78% of Earth's atmosphere, far more than oxygen at about 21%.

Question 5

A scientist repeats an experiment five times and gets similar results each time. This best demonstrates which scientific principle?

Accepted Answer

Reproducibility

Answer

Reproducibility means an experiment yields consistent results when repeated, strengthening confidence in the findings.

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