According to the atomic theory which of the statements describes the location of electrons?

• in the nucleus if the atom

• both in the nucleus and around it

• outside the nucleus in the surrounding electron cloud

• on the outer edge of the nucleus

During a thunderstorm you see lightning before you hear thunder. Which explains this?

• light travels faster than sound

• light has a greater mass than sound

• sound has a longer wavelength than light

• sound and light travel at the same speed

Jaclyn's coffee was too hot so she put it in the freezer for 10 minutes. Why did she do that?

• adding cold to the coffee would lower its temperature

• adding heat from the freezer would lower its temperature

• removing heat from the coffee would lower its temperature

Tags

NGSS.MS-PS1-4

Sandra brews tea and adds ice to the pitcher. In which direction is the thermal energy flowing?

• from the pitcher to the tea

• from the tea to the ice

• from the ice to the air

• from the ice to the tea

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NGSS.MS-PS1-4

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NGSS.MS-PS3-5

In which situation would a person show an increase in weight but not an increase in mass?

• climbing to the top of a mountain

• travelling underwater in a submarine

• living on the international space station

• landing on a planet with more gravity

Which of the following physical properties of water did Thomas measure?

• melting point and boiling point

• volume and thermal conductivity

• solubility and electrical conductivity

• density and physical states of matter

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NGSS.MS-PS1-2

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From the table, which substance has the smallest density. D=m/v

• iron

• gold

• silver

• aluminum

Tags

NGSS.MS-PS1-2

Sodium chloride (table salt) was completely dissolved in water. What would be the best description of the resulting material?

• element

• pure substance

• heterogeneous mixture

• homogeneous mixture

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NGSS.MS-PS1-2

Using the table, which is a reasonable conclusion regarding elements and the compounds they form?

• its physical properties are not changed

• its atoms can only combine in one way

• only its chemical properties are changed

• its atoms combine in a multitude of ways

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NGSS.MS-PS1-1

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What is the relationship between frequency and wavelength in electromagnetic waves?

• as frequency increases, wavelength decreases

• frequency equals wavelength

• as frequency increases, wavelength increases

• the relationship depends on the speed of the wave

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NGSS.HS-PS4-1