Stanford Achievement Test Stanford Achievement Science Concepts 2

Question 1

Which process do plants use to make their own food using sunlight?

Accepted Answer

Photosynthesis

Answer

Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen.

Question 2

What is the term for the force that pulls objects toward the center of Earth?

Accepted Answer

Gravity

Answer

Gravity is the attractive force between objects with mass, pulling everything toward Earth's center.

Question 3

Which state of matter has a definite shape and a definite volume?

Accepted Answer

Solid

Answer

Solids have both a definite shape and definite volume because their particles are tightly packed and vibrate in fixed positions.

Question 4

What do we call the organisms that break down dead matter and return nutrients to the soil?

Accepted Answer

Decomposers

Answer

Decomposers such as fungi and bacteria break down dead organic matter, recycling nutrients back into the ecosystem.

Question 5

Which planet in our solar system is known as the Red Planet?

Accepted Answer

Mars

Answer

Mars appears red because iron oxide (rust) covers much of its surface.

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