6th Grade Science Fall Semester Exam

Front

What happens to the atoms or molecules in a liquid as it gets warmer?

Back

They move faster and spread out more.

Front

In which scenario is the force of friction not found?

Back

Scenario C only.

Front

Which group of elements is typically a gas at room temperature and a poor conductor of electricity?

Back

Nonmetals.

Front

How does Camilla classify water, muddy water, and saltwater?

Back

Water is a pure substance, muddy water is a heterogeneous mixture, and saltwater is a homogeneous mixture.

Front

Which of the following is NOT an indicator of a chemical change?

Back

Change in shape.

Front

What is a pure substance?

Back

A material made of only one type of particle, such as water or gold.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout, like saltwater.

Front

What is a heterogeneous mixture?

Back

A mixture that has a non-uniform composition, like muddy water.

Front

What is friction?

Back

A force that opposes the motion of an object.