Rocks and Fossils

Scientists working in a lab performs a test. One sample streaks white and another red. some are glassy and others dull. What is the scientist testing?

• glass

• soil

• rock

• mineral

What causes cliffs near the ocean to wear down and change shape?

• objects thrown by people

• sand

• animals

• wind and waves

Rain moves soil from hillsides and mountains. They usually end up in plains and valleys. Which terrain is best for growing crops?

• plains and valleys becaus they have rich soil

• mountains and hillsides because they have thin soil

• mountains and hillsides because they get more rain

• plains and valleys because they receive more sun

You observe a rock collection with the following physical properties. Rock A is black and has a hardness of 2, Rock B is blue and has a hardness of 5, Rock C is green and has a hardness 6 and Rock D is yellow and has a hardness 1. How are rocks A and B different?

• color and shape

• color and hardness

• texture and shape

• texture and hardness

What body of water will make rocks the smoothest the fastest?

• A rushing water with heavy rocks.

• a pond

• a calm ocean

• a lake

What causes volcanoes to explode?

• Pressure that has built up deep within the earth

• a crack in the earth's surface

• A mother yeliing at her child

Dr. Perry's class went on a field trip and the students collected many rocks from the riverbed. They were all round and smooth. Why?

• Rushing water in the river wore away jagged edges on the rocks

• Plants released chemicals that wore down the rocks

• The minerals from which the rocks were made always have smooth edges

• The wind over time caused the rocks to become smooth

Look at a small amount of sand through a magnifying glass and you will see lots of tiny rocks. What can be made from melted sand?

• straw

• wood

• plastic

• glass

Plants need sunlight, air, water, and nutrients. Which type of soil is best for holding water for plants?

• soil made of tiny parts that are held together loosely

• soil made of medium size parts that are held loosely together

• soil made of medium size parts that are held tightly together

• soil made of tiny parts that are tightly held together

Soil that is sandy vary in size and texture (feel). If a soil is made of very large pieces, how would the soil feel?

• very rough

• smooth

• somewhat rough

• slick