Chemistry

Front

What causes helium balloons to rise on Earth?

Back

Helium is less dense than air.

Front

Which object has the lowest density in water?

Back

The Ping Pong Ball because it floats to the top.

Front

What are the products of the reaction that produces carbon monoxide?

Back

2 carbon monoxide.

Front

What is an example of a chemical change?

Back

The rusting of iron.

Front

If an object has a density of 0.6 g/mL, will it sink or float in water?

Back

It will float.

Front

What is density?

Back

Density is the mass of an object divided by its volume.

Front

How does temperature affect the density of gases?

Back

As temperature increases, the density of gases generally decreases.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance, while a chemical change alters its chemical composition.

Front

What happens to the density of an object when it is submerged in water?

Back

If the object is less dense than water, it will float; if it is more dense, it will sink.

Front

What is an example of a physical change?

Back

Melting an ice cube.