Rocks and Soil Quiz

Grade 2 · Science · Quiz

Test your knowledge about rocks, minerals, and the different types of soil.

Questions

1. Which of these is the smallest type of rock piece?

   1. Boulder
   2. Pebble
   3. Sand grain
   4. Cobblestone
   Show answer

   Answer: Sand grain

   Sand grains are the smallest rock pieces listed. Sand is made of very tiny pieces of worn-down rock.

2. What helps break rocks into smaller pieces over time?

   1. Sunlight and heat only
   2. Wind, water, and ice
   3. Animals digging
   4. Plants growing
   Show answer

   Answer: Wind, water, and ice

   Wind, water, and ice all help break rocks into smaller pieces through a process called weathering.

3. Sandy soil is the best soil for growing most plants.

   Show answer

   Answer: False

   Sandy soil does not hold water or nutrients well. Loam, a mix of sand, clay, and organic matter, is best for most plants.

4. What do we call the natural materials that make up rocks?

   1. Nutrients
   2. Fossils
   3. Minerals
   4. Crystals
   Show answer

   Answer: Minerals

   Minerals are the natural solid materials that make up rocks. Different minerals give rocks different colors and properties.

5. Where do plants get the nutrients they need to grow?

   1. From sunlight
   2. From the air
   3. From rain water only
   4. From the soil
   Show answer

   Answer: From the soil

   Soil contains nutrients that plants absorb through their roots to grow and stay healthy.

6. Rocks can be found in rivers, mountains, and underground.

   Show answer

   Answer: True

   Rocks are found in many places including rivers, mountains, underground, and on the surface of the earth.

7. What is loam?

   1. A type of rock found in rivers
   2. A mix of sand, clay, and decayed plant matter
   3. A type of mineral found underground
   4. Water found in soil
   Show answer

   Answer: A mix of sand, clay, and decayed plant matter

   Loam is a rich type of soil that mixes sand, clay, and decayed plant matter, making it great for growing plants.

8. What makes a river rock smooth?

   1. Animals rubbing against it
   2. Being near the sun for a long time
   3. Water tumbling it against other rocks for many years
   4. Soil covering it up
   Show answer

   Answer: Water tumbling it against other rocks for many years

   Moving water in rivers carries rocks and tumbles them against each other for many years, slowly wearing away the rough edges and making them smooth.

Get a personalized course on Rocks and Soil built around your child.