Law of Conservation of Mass

Law of Conservation of Mass

Multiple Choice

Which state of matter do the particles slip and slide past each other?

• solid

• liquid

• gas

Multiple Choice

What state of matter is represented in the picture above?

• solid

• liquid

• gas

Multiple Choice

What state of matter is represented in this picture?

• solid

• liquid

• gas

Multiple Choice

Heating a solid to a high temperature will usually result in this phase change.

• Condensation

• Melting

• Sublimation

• Evaporation

Multiple Choice

This state of matter expands to fill its container.

• Solid

• Liquid

• Gas

• Plasma

Multiple Choice

When an object has the ability to be stretched into a thin wire this is

• Density

• Ductility

• Dirtability

• Dissovility

Multiple Choice

The ability to hammered into a thin sheet or be bent is

• Ductility

• Solubility

• Density

• Malleability

Multiple Choice

which one is the definition of chemical property?

• a property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed
• any change that results in the formation of new chemical substances
• combustibility

Multiple Choice

Physical properties are

• properties that can be observed without changing the identity of the substance
• properties that describe how a substance changes into a completely different substance

Multiple Choice

Flammability (burns): Chemical or Physical Property

• Chemical Property
• Physical Property

Multiple Choice

Solubility (dissolves): Chemical or Physical Property

• Chemical Property
• Physical Property

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

Multiple Choice

If reaction starts with 20g of reactants it should produce

• a total of 40g of products

• a total of 10g of products

• a total of 80 g of products

• a total of 20g of products

Multiple Choice

What is a closed system?

• a system where none of the reactants or products are allowed to escape

• compounds made of thousands of repeating smaller molecules

• the output, or result of a chemical reaction

• occurs when the atoms and molecules of two or more substances rearrange to form new substances

Multiple Choice

Open systems like the oven allows energy to enter and leave

• True

• False

Multiple Choice

A boiling pot of water on a stove is what type of system

• Closed System

• Open System

Multiple Choice

Mr. Brady did an experiment. He started with 15 grams of mass. At the end, he had 13 grams of mass. What happened?

• His experiment was in an open system, so some mass escaped.

• His experiment was in a closed system so the mass did not change.

Multiple Choice

Mr. Brady did an experiment. The mass he started with was 15 grams. How much mass should he end with?

• less than 15 grams

• more than 15 grams

• 15 grams

Multiple Choice

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

Multiple Choice

Why do some substances float on water?

• they are warmer than water
• they are cooler than water
• they are more dense than water
• they are less dense than water

Multiple Choice

Frank has an eraser. It has a mass of 4g, and a volume of 2cm³. What is its density?

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Multiple Choice

Which liquid is the least dense?

• oil
• water
• syrup 
• plastic bottle