Stanford Achievement Test Stanford Achievement Science Concepts 4

Question 1

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

Accepted Answer

Paper being cut

Answer

Cutting paper changes only its shape and size without creating a new substance, making it a physical change.

Question 2

What do scientists call the path that Earth travels around the Sun?

Accepted Answer

Orbit

Answer

Earth's orbit is its elliptical path around the Sun, taking approximately 365.25 days to complete one trip.

Question 3

Which part of a plant absorbs water and minerals from the soil?

Accepted Answer

Roots

Answer

Roots anchor the plant in the soil and absorb water and dissolved minerals needed for growth and photosynthesis.

Question 4

What type of energy is stored in food and released when organisms digest it?

Accepted Answer

Chemical energy

Answer

Chemical energy is stored in the molecular bonds of food and released through cellular respiration to power life processes.

Question 5

Which of the following best describes an ecosystem?

Accepted Answer

All living and nonliving things interacting in an area

Answer

An ecosystem includes all living organisms and the nonliving environment—like soil, water, and air—interacting together.

Stanford Achievement Test Practice Test