Describing, Measuring, Changes and Energy Matter

Alisa Placed a small seashell on the pan of a balance. What other tool does she need to determine the density of the seashell?

• Scale

• calculartor

• thermometer

• graduated cylinder

Magnetism, solubility and malleability are physical properties of matter. What makes these properties different from the chemical properties?

• Physical properties relate to elements rather than compounds.

• Physical properties appear only after a chemical change occurs.

• Physical properties can be observe without attempting to change the identity of the substance.

• Physical properties describe elements in the solid state rather than in the liquid or gas state.

The diagram above models a change that occurs in matter. Base on what you know about changes in matter, explain why the diagram shows a physical change rather than a chemical change.

• The particles get smaller

• the volume of the matter decreases

• The composition of the matter stays the same

• The particles change into particles of different substances.

Tags

NGSS.MS-PS1-2

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

Josie partially filled a graduated cylinder with water. She then dropped a rock into the water. The illustration above shows what happened to the level of the water inside the graduated cylinder. Which property of matter is Josie measuring?

• Mass

• length

• weight

• volume

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.

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

Which process is an example of a physical change?

• Burning

• rusting

• flattening

• decomposing

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

NGSS.MS-PS2-3

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