Sc 7 P 10 2

Katie used a flashlight to find her way through her backyard in the dark. Her best friend Clarice followed slowly behind her. After a few minutes, Katie was several feet ahead of her. Clarice then found it difficult to see where to walk because the light from Katie’s flashlight was dimmer. What caused the light to be dimmer for Clarice?

• absorption of the light by the particles in the air

• refraction of the light as it travels through the air

• transmission of the light through the night darkness

• reflection of the light by the ground

Tags

NGSS.MS-PS4-2

Light that is reflected off of objects can be detected by our eyes. This is why you can see your image in a mirror. Why can’t you see your image reflected off of a wall?

• Your eyes detect all of the reflected light.

• A wall absorbs all of the light that strikes it.

• Not all of the light that reflects off of a wall is directed toward your eyes.

• Light waves do not travel far after striking an object such as a wall.

Tags

NGSS.MS-PS4-2

Which statement best identifies a solid? (SC.8.P.8.1.)

• Particles barely move and are tightly packed.

• Particles barely move and are farther apart.

• Particles move more quickly and are farther apart.

• Particles move more quickly and are tightly packed.

How does the picture relate to the particles in a solid?

• The cars are driving fast and switching lanes like the particles in a solid.

• The cars are sliding past each other while driving the speed limit like the particles in a solid.

• The cars are moving so fast you cannot even see them like the particles in a solid.

• The cars are barely moving like the particles in a solid.

1. Which statement best identifies which of these models is a liquid? (SC.8.P.8.1)

• Diagram A is a liquid, because its particles move the slowest and are tightly packed.

• Diagram B is a liquid, because its particles move at a medium speed, and are sliding past each other.

  C.

• Diagram C is a liquid, because its particles move the fastest and bounce all over the place.

• Diagram A and B are both liquids, because the particles are always touching.

Tags

NGSS.MS-PS1-4

When the process of melting happens, what is happening with the molecules and the phase change? (SC.8.P.11.1)

• The molecules are speeding up turning a solid into a liquid.

• The molecules are slowing down turning a solid into a liquid

• The molecules are speeding up turning a liquid into a solid.

• The molecules are slowing down turning a liquid into a solid.

Tags

NGSS.MS-PS1-4

C6H12O6 is the chemical formula for glucose, a type of sugar. Which statement is true about glucose?

• Glucose is an element, because it can be separated into smaller components.

• Glucose is an element, because it is made up of more than one kind of atom.

• Glucose is a compound, because it is made of more than one element.

• Glucose is a compound, because it is made of protons, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

A student has a sample of an element. Which describes a trait the sample must have in order to be considered an element?

• The sample is a liquid at room temperature.

• The sample is made of only one type of atom.

• The sample contains different types of particles

• The sample can be seen only with a microscope.

The periodic table of the elements organizes elements according to their properties. A section of the periodic table is shown.

Which set of elements below is the most similar in chemical behavior?

• H, Be, Sc

• Fr, Ra, Rf

• Ti, V, Cr

• Be, Ca, Ra

All atoms of an element have in their nuclei the same number of...

• electrons

• isotopes

• molecules

• protons