Elementary Education: Science Content Knowledge Flashcards

Which process describes water changing directly from a solid to a gas without becoming a liquid?

Answer: Sublimation

Sublimation is the phase change from solid directly to gas, as seen in dry ice.

A student observes that a metal spoon in hot soup becomes warm at the handle. Which heat transfer method is responsible?

Answer: Conduction

Conduction transfers heat through direct contact between particles in a solid.

In a food web, organisms that break down dead matter and return nutrients to the soil are called what?

Answer: Decomposers

Decomposers like fungi and bacteria recycle nutrients from dead organisms.

Which of the following is a renewable resource?

Answer: Wind

Wind is renewable because it is naturally replenished and not depleted by use.

What force keeps the planets in orbit around the Sun?

Answer: Gravity

Gravity is the attractive force that keeps planets orbiting the Sun.

Which part of a plant cell carries out photosynthesis?

Answer: Chloroplast

Chloroplasts contain chlorophyll and capture light energy for photosynthesis.

A controlled experiment should have how many variables changed at a time to test a clear cause?

Answer: One

Changing only one variable isolates its effect, keeping the test valid.