Matter & Energy

A child is upset because his ice cream is melting. He thinks he now has less dessert. Which of the following explanations correctly states which of the following explanations correctly states why the child is incorrect?

• He actually has more, not less, ice cream.

• no mass is lost during the change of state.

• The mass will increase if he freezes the melted ice cream.

• Mass is lost only during certain changes of state such as freezing.

Tags

NGSS.MS-PS1-5

You are shining a light through liquids A and B, which are both mixtures. You can see the light pass through A but B looks cloudy and you see tiny particles floating in it. Which of these statements best describes the liquids?

• Both the liquids are solutions

• Both the liquids are suspensions

• A is a solution and B is a suspension.

• A is a suspension and B is a solution

Tags

NGSS.MS-PS1-2

The diagram above shows a magnet near a pile of particles of iron and sulfur. the magnet attracts the iron, separating it from the mixture. Base on the diagram, which statement is true?

• The parts of a mixture keep their own properties.

• The elements in the compound keep their own properties

• The properties of a mixture are different from the properties of its parts.

• The properties of a compound are different from the properites of its elements.

Tags

NGSS.MS-PS1-2

Chemical changes result in new substances, but physical changes do not. Which process is an example of a chemical change?

• chopping a tree

• cooking a steak

• heating a cup of tea

• drying clothes in the dryer

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Two beakers shown below contain pure water. Which of the following is a chemical property of the water in both beakers?

• The water is colorless

• the water freezes at 0 degrees Celsius

• the water reacts with some metals

• the water has a total volume of about 400 mL

Tags

NGSS.MS-PS1-2

When a solid turns directly from a solid to a gas, this process is called?

• evaporation

• sublimation

• freezing

• depostion

Tags

NGSS.MS-PS3-4

When a gas turns into a solid this process is called?

• deposition

• melting

• condensation

• sumblimation

Tags

NGSS.MS-PS1-4

Which of the following is a way in which elements and compounds are similar?

• Elements and compounds are both pure substances.

• Elements and compounds are both listed on the periodic table.

• Elements and compounds are both made up of different kinds of atoms.

• Elements and compounds can bother be broken down by physical changes.

Adding HEAT to matter causes its particles to:

• move faster and farther apart

• Move slower and farther apart

• Move faster and closer together

• Move slower and closer together

Tags

NGSS.MS-PS1-4

Which state of matter has particles that are tightly packed?

• liquid

• gas

• solid

Tags

NGSS.MS-PS1-1