Why do fish swim in schools?/ ¿Por qué los peces nadan en los bancos?

• to learn

• to hunt

• to conserve energy

• for protection

How does the behavior of electrons in an atom determine its chemical properties?

• Electrons in the outer shell determine reactivity

• Electrons in the inner shell determine reactivity

• All electrons equally determine reactivity

• Electrons do not affect chemical properties

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following behaviors is an example of a physical change?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

What is the behavior of light when it passes through a prism?

• It speeds up

• It slows down

• It bends and disperses into a spectrum

• It remains unchanged

Tags

NGSS.MS-PS4-2

Which behavior of water allows it to dissolve many substances?

• Its high density

• Its polarity

• Its high boiling point

• Its low freezing point

What behavior of gases is described by Boyle's Law?

• Pressure increases as volume increases

• Pressure decreases as volume increases

• Temperature increases as volume increases

• Temperature decreases as volume increases

How does the behavior of particles in a solid differ from those in a liquid?

• Particles in a solid move freely

• Particles in a solid are fixed in place

• Particles in a liquid are fixed in place

• Particles in a liquid do not move

Tags

NGSS.MS-PS1-4

What behavior of enzymes allows them to speed up chemical reactions?

• They are consumed in the reaction

• They lower the activation energy

• They increase the activation energy

• They change the products of the reaction

Which behavior of sound waves explains why we hear echoes?

• Reflection

• Refraction

• Diffraction

• Absorption

Tags

NGSS.MS-PS4-2

What behavior of the Earth's atmosphere causes the sky to appear blue?

• Absorption of blue light

• Scattering of blue light

• Reflection of blue light

• Emission of blue light