Ch 1 Introduction to Matter

Which of the following changes demonstrates a chemical property?

• a substance breaks in half

• substance combusts

• hammer bounces off a substance

• substance floats on water

Tags

NGSS.MS-PS1-2

Which of the following is a solution?

• salt water

• macaroni and cheese

• cake mix

• vegetable soup

The abilities to dissolve in water and to conduct electricity are examples of...

• natural properties

• chemical properties

• natural laws of matter

• physical properties

Which is the correct equation for calculating density?

• Density = Mass / Volume

• Density = Mass / Weight

• Density = Volume / Mass

• Density = Volume / Weight

What is the density of an object whose mass is 180 grams and whose volume is 45 cm ^ 3?

• 4 cm^3/g

• 0.25 g / cm^3

• 4 g/cm^3

• 0.25 cm^3/g

Weight is a flawed measure of mass because it...

• is not used in other countries.

• is affected by the force of gravity.

• tends to fluctuate

• can be influenced by temperature and pressure

Which of the following describes a physical change?

• a marshmallow burns over an open flame

• icicles melt from a rooftop

• a cat eats a piece of fish

• milk turns sour

Tags

NGSS.MS-PS1-4

Which of the following describes a chemical change?

• clear liquids mix, producing a cloudy liquid with yellow chunks

• silver coins are melted down and shaped into a solid brick

• salt is added to a pot of hot water, and the water's boiling point changes

• an apple is chopped into eight slices

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The law of conservation of mass states that

• matter is neither created nor destroyed

• the mass of an object remains the same even if chemical change occurs

• the number of molecules before and after a chemical reaction cannot change

• mass is lost when a chemical change occurs

Tags

NGSS.MS-PS1-5

Temperature is...

• the movement of thermal energy from a solid to a liquid

• the difference in thermal energy between two objects

• a measure of how hot or cold something is

• a measure of how fast thermal energy is moving

Tags

NGSS.MS-PS3-4