SC 4 P 10 2

When a radio is turned on, what energy transformation occurs?

• Heat energy is changed to light energy.

• Kinetic energy is changed to sound energy.

• Electrical energy is changed to sound energy.

• Chemical energy is changed to mechanical energy.

12.What purpose do batteries have in an electrical circuit?

• They absorb the thermal energy.

• They store light energy for later use.

• They convert chemical energy to electrical energy.

• They convert solar energy to usable kinetic energy.

When people want to use water to create electricity they generally build a dam to hold the water back, creating a large lake behind the dam. Why is it necessary to hold the water back with a dam in order to produce electricity?

• It increases the amount of water available.

• It increases the force with which the water flows.

• It forces the water to flow in the desired direction.

• It makes the water still enough to create electricity.

Tags

NGSS.MS-ETS1-2

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

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

Since sodium chloride is classified as a compound, a sample of it contains...

• atoms that are gases, liquids, and solids.

• more than one kind of atom

• matter than cannot be reduced into atoms

• a solution of atoms and molecules

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