Kinley created a model of the molecules of a solid, liquid, and gas to compare the motion of the particles.

Which state of matter does each image represent?

• A - solid, B - liquid, C - gas

• A - gas, B - liquid, C - solid

• A - liquid, B - gas, C - solid

• A - liquid, B - solid, C - gas

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

What should be the expected outcome of the experiment for both student groups completing this experiment? Provide a rationale for your answer.

• There should be a greater change in mass because matter was destroyed.

• The change in mass should be zero because matter cannot be created or destroyed.

• The final mass should have been greater than the initial mass because matter was created.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The students in Group One determine that they cannot accept their results.

Identify the change they should make in their investigation and the potential impact the change will have on their results.

• Group 1 should not wait 2 minutes to measure the final mass to keep the gas from escaping.

• Group 1 should close the container after mixing the two ingredients to keep the gas from escaping,

• Group 1 should close the container before mixing the ingredients to keep the gas from escaping.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

You are planning and carrying out an investigation to compare the physical and chemical properties of copper, a transition metal. You measure the mass and the volume of a sample of the copper. You drop nitric acid on a sample of the copper. You measure the temperature at which the copper melts. You hammer a sample of copper into a thin sheet.

Which of the following statements is TRUE about the chemical and physical properties of copper in the investigations you carried out and why?

• You used mass and volume to calculate density. Density is a chemical property because the mass and volume of different pieces of copper is different.

• Different samples of copper melted at the same temperature. This demonstrated a chemical property because different size samples of copper took longer to melt than others.

• A sample of copper was hammered into a thin sheet. This

  demonstrated a chemical property because different samples of

  copper may not hammer to the same thickness.

• The sample of copper changed color and bubbles of gas formed on the surface when you dropped nitric acid on it. This demonstrated a chemical property because the copper is changing into other substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which observation indicates a chemical property?

• slowly dissolves

• turns cloudy

• turns black

• gritty

Tags

NGSS.MS-PS1-2

Is Ellie’s classification correct? Why or why not?

• She is correct because Samples A and B both contain Sample C and therefore are considered mixtures.

• She is incorrect because Sample B contains different types of

  substances and should be classified as a pure substance.

• She is incorrect because Sample A contains only one type of

  substance and should be classified as a pure substance.

• She is correct because Samples A and B both contain different

  substances to make mixtures and sample C is made up of one

  substance to be a pure substance.

Tags

NGSS.MS-PS1-1

Where should plasma be placed in the States of Matter Model?

• Space 1 because as plasma is heated it changes into a solid.

• Space 2 because as a solid is heated it changes into plasma.

• Space 3 because as a liquid is heated it changes into plasma.

• Space 4 because as a gas is heated it changes into plasma.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Penny placed a tablet of baking soda in a cup of water. The tablet immediately began to bubble, fizz, and eventually dissolve.

Did a physical or chemical change occur and how do you know?

• chemical; the tablet gave off a gas in the form of bubbles

• chemical; the fizzing sound indicates a new substance was formed

• physical; the tablet only dissolved in the water and formed a mixture

• physical; the water can be boiled off and the tablet residue would be left

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which terms should Jimmy use in boxes 1-4 to accurately complete his model?

• 1-Heterogeneous; 2: Homogeneous; 3-Elements; 4-Compounds

• 1-Elements; 2-Compounds; 3-Heterogeneous; 4-Homogeneous

• 1-Heterogeneous; 2-Elements; 3-Homogeneous; 4-Compounds

• 1-Compounds; 2-Heterogeneous; 3-Homogeneous; 4-Elements

Tags

NGSS.MS-PS1-1

Which of these is a pure substance and why?

• Milk, because every portion of the matter is the same, and its

  components can only be separated chemically.

• Coffee, because every portion of the matter is the same, and its

  components can only be separated chemically.

• Salt water, because every portion of the matter is the same, and its components can only be separated chemically.

• Carbon dioxide, because every portion of the matter is the same, and its components can only be separated chemically.

Tags

NGSS.MS-PS1-1