Grade 4 Mystery Powders Science Quiz

What is substance?

• When a liquid turns into a gas (vapor) due to an increase of heat

• The physical material that something is made of that has unique properties

• Any change that causes a new substance to be formed that rearranges molecules

• The ability for a substance to dissolve into another substance and become a part of it

Are powder A and powder B the same substance?

• Yes

• No

Do Joseph’s results from Powder B most likely represent reversible or irreversible changes?

• Reversible

• Irreversible

What does it mean to dissolve?

• The ability for a substance to dissolve into another substance and become a part of it

• Any change that causes a new substance to be formed that rearranges molecules

• When a liquid turns into a gas (vapor) due to an increase of heat

• The physical material that something is made of that has unique properties

• Elijah, Aria, and James were conducting a science experiment in their school lab. They mixed two substances and observed that a new substance was formed. This change was IRREVERSIBLE. What type of change did they observe?

• physical change

• chemical change

• molecules

• nuclear change

When a substance breaks up, is absorbed or mixes into a liquid by disappearing is called ________.

1. Which of the following describes solubility?

• 1. The ability of something to dissolve in a liquid.

• 1. The ability of a liquid to change color.

• 1. The speed of pouring a liquid out of a container.

• 1. The time it takes for something to settle at the bottom of a liquid.

1. Which substance was insoluble in water?

• 1. Alka- Seltzer

• 1. Sand

What is the process of evaporation?

• When a liquid turns into a gas (vapor) due to an increase of heat

• Any change that causes a new substance to be formed that rearranges molecules

• The physical material that something is made of that has unique properties

• The ability for a substance to dissolve into another substance and become a part of it

How are a mixture of sand and water and a mixture of salt and water different?

• Sand melts in the water. Salt sinks in the water.

• Sand floats in water. Salt sinks in water.

• Salt dissolves in the water. Sand does not dissolve in water.

• Sand dissolves in water. Salt does not dissolve in water.