Which statement defines a scientific theory?

• combined current scientific evidence that explains a series of phenomena

• past experiments that reveal information about a single phenomenon

• combined observations that describe a series of phenomena

• current scientific evidence that models a certain phenomenon

How does salt dissolves in water?

• covalent bonds are formed between H and Cl, and O and Na

• Covalent bonds are formed between H and Na, and O and CL

• electrostatic (ionic) bonds are formed between O and Cl, and H and Na

• electrostatic (ionic) bonds are formed between H and Cl, and O and Na

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What investigation would you perform to see why manatees are seen during winter months near a power plant?

• Create a model of a manatee to study locomotion in the water

• a yearlong study to determine which temperatures they inhabit most often.

• a controlled experiment to determine the amount of body heat released

• record the change in water temperature in the body of water for one month

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NGSS.MS-LS2-4

NGSS.MS-PS3-4

Evaporation occurs when water begins to change state from liquid to gas. How does evaporation help moderate temperature?

• Water absorbs little energy with a great change in temp

• water absorbs a great deal of energy with no change in temp

• Water absorbs little energy without a great change in temp

• Water absorbs little energy without a great change in temp

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When is a scientific theory accepted?

• the theory is proved correct once

• the theory is supported by public opinion

• many scientific investigations have similar results

• Many scientific leaders agree with the collected data

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NGSS.MS-PS3-5

Students are observing an art piece at a museum. Which question would best be answered scientifically?

• What was the composition of the paint the artist used?

• What mood was the artist in while painting the piece?

• What technique did the artist use to paint the piece?

• What was the artist's intention for the painting?

Tags

NGSS.MS-PS1-1

Democritus believed matter was formed from atoms that had different structures, sizes, & shapes. How was this verified?

• through confirmation in early philosophical texts

• through the continued discussion among modern philosophers

• through knowledge that all matter must have particles that do not divide

• through many years of experimentation by chemists

Tags

NGSS.MS-PS1-1

Gas molecules are invisible. How do scientists make assumptions about the behavior of gases?

• through experimental observations and models

• through data collection from outer space

• through theoretical logic

• through mutual agreement

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NGSS.HS-PS3-2

What property of substances determines their solubility in water? (a)  

• density
• masss
• polarity
• viscosity

If you were making a model of the atom using apples, oranges, grapes, and cantaloupes, how would you arrange them?

• the grapes in the center, the apples &oranges should be around the center

• cantaloupes and grapes in the center, apples around the center

• apples & oranges in the center, and grapes around the center

• the cantaloupes in the center, the oranges and grapes around it

Tags

NGSS.MS-PS1-1