Matter Check-In

Which of the following will need to happen for a material to change form a solid to a gas?

• Increase in temperature

• Decrease in temperature

Two or more substances physically combined together is called a ...

• compound

• element

• mixture

• molecule

Which has less thermal energy? A small cup of hot chocolate at 65°C or a large thermos of hot chocolate at 65°C? Why?

• The thermos of hot chocolate has more thermal energy because it is hotter and has more kinetic energy.

• The cup of hot chocolate has more thermal energy because it is hotter and has particles with more potential energy.

• The thermos of hot chocolate has more thermal energy because is is larger and with more particles so there is more potential energy.

• The cup of hot chocolate has more thermal energy because it is hotter and the particle have more kinetic energy.

Heat transfer will stop once ...

• both objects are hot

• both objects are cold

• both objects are the same temperature

• it never stops

Use the image to determine if it is a mixture or a pure substance.

• mixture
• pure substance

What is the smallest unit of matter?

• An element

• An atom

• A cell

Which substance is soluble in room temperature water?

• sugar

• saw dust

• gravel

• tea leaves

What particle of an atom has a negative charge?

• Electron

• Neutron

• Proton

• Quark

What particle of an atom has a positive charge?

• Electron

• Neutron

• Proton

• Quark

What particle of an atom has a neutral charge?

• Electron

• Neutron

• Proton

• Quark