Physical Science Energy

When substances are mixed and heated, a change can occur. The image below shows what happens when sodium is added to chlorine gas and burned. What demonstrates that this was a chemical change and not a physical change?

• Both the solid sodium and the sodium chloride formed are solids.

• Two substances with different properties were mixed together.

• A new substance was formed when the sodium was burned.

• Mass was conserved after the chlorine and sodium were mixed and heated.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Janine hits a hockey puck across an ice rink. The distance between the puck and Janine for the first ten seconds after she hits it is graphed below. Judging from the graph, which of the following statements is true?

• The hockey puck's speed increased as it moved away from Janine.

• The hockey puck's speed decreased as it moved away from Janine.

• The hockey puck moved at a constant speed away from Janine.

• The hokey puck moved at a constant speed toward Janine.

Tags

NGSS.MS-PS3-1

Miguel and Brian made a telephone with a string and two aluminum cans as shown below. After pulling the string tight, Miguel talked into his aluminum can. Brian could hear Miguel's voice through the aluminum can attached to the string. Which of the following best explains the sound Miguel made?

• The sound traveled through the string but not through the air.

• The sound traveled through the string and the air at the same speeds.

• The sound traveled through the string and the air at different speeds.

• The sound traveled through the air but not through the string.

Tags

NGSS.MS-PS4-2

What characteristic feature of a wave is indicated by the letter C on the diagram below?

• amplitude

• loudness

• wavelength

• frequency

Tags

NGSS.MS-PS4-1

Bryan and Alyssa are playing tug-of-war against Daniel and Maria. Bryan and Alyssa are exerting a combined force of 10 N. Daniel and Maria are exerting 12 N of force. Which of the following has resulted?

• an unbalanced force moving everyone in Bryan and Alyssa's direction

• an unbalanced force moving everyone in Daniel and Maria's direction

• a balanced force moving everyone in Daniel and Maria's direction

• a balanced force leaving everyone in the same place

Tags

NGSS.MS-PS2-2

What are the differences between physical and chemical changes in matter?

• Chemical changes only affect the appearance of a substance

• Physical changes involve a change in the chemical composition of a substance

• Physical changes result in the formation of new substances with different chemical properties

• Physical changes involve a change in the form or appearance of a substance without changing its chemical composition, while chemical changes result in the formation of new substances with different chemical properties.

What is the law of conservation of mass in chemical reactions?

• Matter is neither created nor destroyed, only rearranged.

• Matter disappears completely in chemical reactions

• Matter is constantly created and destroyed

• Matter can be transformed into energy in chemical reactions

Tags

NGSS.MS-PS1-5

What are the different states of matter and their properties?

• Round, square, and triangle with different colors

• Hot, cold, and warm with different textures

• Red, blue, and green with different shapes

• Solid, liquid, and gas with different properties

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Max combines baking soda and vinegar in a flask. Which is the most likely reason Max should place a balloon over the mouth of the flask before he mixes the two substances?

• to prevent any gas formed as a product from escaping during the reaction

• to prevent any liquid used as a reactant from escaping during the reaction

• to prevent any powder used as a reactant from escaping during the reaction

• to prevent any liquid formed as a product from escaping during the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

One-half cup of baking soda is placed inside a plastic bag containing one cup of vinegar. Which best describes the evidence that a chemical reaction is taking place?

• The substance boils and changes state of matter.

• Bubbles are created, and a new substance is formed.

• The final result of the reaction is a vinegar and baking soda mixture

• The vinegar and the baking soda remain unchanged after the reaction.

Tags

NGSS.MS-PS1-2