Stanford Achievement Science Concepts Questions and Answers

Question 1

A student places a metal spoon in a cup of hot soup. After a few minutes, the handle of the spoon becomes warm. Which of the following best explains this phenomenon?

Accepted Answer

Heat from the soup is transferred through the spoon by conduction.

Answer

Heat from the soup is transferred through the spoon by convection.

Answer

The spoon produces its own heat in response to the soup.

Answer

Warm air from above the soup heats the spoon handle by radiation.

Question 2

A scientist is testing the effect of different amounts of fertilizer on the height of tomato plants. Each plant is given the same amount of water and sunlight. What is the independent variable in this experiment?

Accepted Answer

The amount of fertilizer used.

Answer

The height of the tomato plants.

Answer

The amount of sunlight.

Answer

The type of tomato plant.

Question 3

In a forest ecosystem, which of the following is an example of a producer?

Accepted Answer

An oak tree making its own food using sunlight.

Answer

A mushroom breaking down a dead log.

Answer

A deer eating leaves from a bush.

Answer

A snake eating a mouse.

Question 4

Which of the following is a primary requirement for the process of photosynthesis to occur?

Accepted Answer

Carbon Dioxide

Answer

Oxygen

Answer

Soil

Answer

Glucose

Question 5

After a rainstorm, a puddle of water on the sidewalk disappears over a few hours on a sunny day. This process is known as:

Accepted Answer

Evaporation

Answer

Condensation

Answer

Precipitation

Answer

Transpiration

Question 6

Which of the following is an example of physical weathering?

Accepted Answer

Water freezing in the crack of a rock and splitting it apart.

Answer

Acid rain dissolving the surface of a limestone statue.

Answer

Iron in a rock rusting and turning reddish-brown.

Answer

A lichen releasing chemicals that break down a rock's minerals.