Separating Sand and Gravel Mixtures

The video tutorial explains how to separate a mixture of gravel and sand by understanding their physical properties. Both materials are insoluble and non-magnetic, but they differ in size. The tutorial demonstrates using a strainer to separate the larger gravel from the finer sand, emphasizing the importance of particle size in separation processes.

What is the main problem presented in the video?

• How to make gravel magnetic

• How to dissolve gravel in water

• How to separate gravel and sand

• How to mix gravel and sand

Which of the following is a physical property of both gravel and sand?

• They are soluble in water

• They are magnetic

• They are less dense than water

• They are more dense than water

Why won't running a magnet over the mixture help in separating gravel and sand?

• Because only sand is magnetic

• Because only gravel is magnetic

• Because neither is magnetic

• Because both are magnetic

What is the key physical property used to separate gravel and sand?

• Magnetism

• Size

• Density

• Color

What tool is suggested for separating gravel and sand?

• A scale

• A strainer

• A blender

• A magnet

What happens to the sand when using the suggested tool for separation?

• It gets caught in the strainer

• It dissolves in water

• It passes through the strainer

• It becomes magnetic

What happens to the gravel when using the suggested tool for separation?

• It becomes magnetic

• It gets caught in the strainer

• It dissolves in water

• It passes through the strainer