Science Quiz

Which of the following is an example of a chemical change?

• Dissolving table sugar in water.

• Drops of water forming on a cup of iced tea on a hot day.

• Melting gold to make jewelry.

• An old penny rusting.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Brian's family has a compost pile at home. They put all the weeds they pull up from the garden in it as well as any vegetable waste they gather from the kitchen. If they keep it moist, all this vegetation will eventually turn into organic soil by the chemical process of decay. Since decay involves a variety of chemical reactions, how might temperature affect the rate at which the compost turns into soil?

• Temperatures near freezing would make it speed up.

• It would happen faster at warmer air temperatures.

• Changing temperatures would not affect the chemical reactions.

• Warm summer air temperatures would make it slow down.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Copper (Cu) reacts with oxygen (O) to form copper oxide (CuO). The chemical properties of copper oxide (CuO) are most likely:

• Different from copper or oxygen

• Similar to both copper and oxygen

• Similar to only copper

• Similar to only oxygen

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

Based on the key, which figure represents a mixture?

• Figure 1

• Figure 2

• Figure 3

• Figure 4

Fill in the blank: The chemical formula for water is ___.

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NGSS.MS-PS1-1

The diagram below represents the creation of a sugar solution by adding sugar to water then stirring the mixture. Which of the following is true of this?

• The mass of the sugar and water is the same as the mass of the sugar solution.

• The mass of the sugar and water is greater than the mass of the sugar solution.

• The mass of the sugar solution is greater than the mass of the sugar and water.

• The mass of the sugar and water is less than the sugar solution.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

In order to help visualize an atom, a scientist may do which of the following?

• Form a hypothesis.

• Make a model.

• Create a law.

• Develop a theory.

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NGSS.MS-PS1-1

What do these data indicate about gastric juice?

• It is very acidic

• It is very basic

• It is neutral

• It is dark red

The atomic theory has been developed over many years due to the work of many scientists. Each time new evidence was discovered changes had to be made. Which of the following statements is true about how new evidence affects theories?

• As new evidence is found, the evidence is changed to make it better fit the existing model.

• As new evidence is found, the theory is revised in order to make it fit the data better.

• As new evidence is found, the theory is discarded completely and scientists start over with a completely new theory.

• As new evidence is found a new theory is introduced that does not fit the data as well.

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NGSS.HS-LS4-1

Which of the following best describes the composition of an atom?

• Protons, neutrons, and electrons all grouped together in the center.

• A core of negatively and positively charged particles surrounded by neutral particles.

• A nucleus of positive and neutral particles surrounded by negative particles.

• A center of electrons and neutrons surrounded by protons.

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NGSS.MS-PS1-1