Lesson 2 Model Matter

Lisa makes a model of a water molecule. Which best describes an advantage of the model?

• A.

  The model shows that water exists as a solid, liquid, and gas.

• B.

  The model shows observable properties of water.

• C.

  The model shows how water interacts with other substances.

• D.

  The model shows parts of the molecule that are too small to see.

Tags

NGSS.MS-PS1-1

Lisa makes a model of a water molecule. Choose the words to finish the sentence.

The water molecule is a(n)_________ because it is made of____________.

• atom, 3 atoms

• element, one compound

• element, 2 elements

• compound, 2 elements

Tags

NGSS.MS-PS1-1

Lisa makes a model of a water molecule. Lisa changes her model by adding another circle to represent oxygen as part of the molecule. How does this change what the model shows?

• A.

  The model now shows that water can change into new substances.

• B.

  The model now shows a larger water molecule.

• C.

  The model now shows a different kind of molecule.

• D.

  The model now shows that water molecules can have two oxygen atoms.

Tags

NGSS.MS-PS1-1

Which model would best demonstrate evidence of matter that cannot be seen?

• A.

  Blow up a balloon with helium gas.

• B.

  Burn a piece of paper to make ashes.

• C.

  Feel the heat given off by a lightbulb.

• D.

  Add water to a mixture of sand and gravel.

Tags

NGSS.MS-PS1-5

Jin knows that there is water in the air in the form of a gas. It is called water vapor. He also knows that when water vapor cools, it turns from a gas into a liquid. He decides to use a model to show that there is water in the air that people cannot see. He places a glass of cold ice water on a picnic table on a warm day. Jin lets the glass sit on the table for several minutes. Which observation will show that there is water in the air that people cannot see?

• A.

  The ice in the glass will melt.

• B.

  Water droplets will form on the outside of the glass.

• C.

  Gas from the surrounding air will enter the glass.

• D.

  The water in the glass will get warmer.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

A hand lens, or magnifying glass, magnifies objects. Karen uses a hand lens to observe a rock. Which observation could Karen make using the hand lens?

• A.

  The rock is made of atoms.

• B.

  The rock contains different kinds of molecules.

• C.

  The rock is made of small grains of sand.

• D.

  The rock weighs about 2 kilograms.

Tags

NGSS.MS-PS1-1