EOC Physical Science

How many neutrons are in an atom of H-3?

• 1

• 2

• 3

• 4

Which best represents how electrons are arranged in the energy levels of a carbon atom?

• first energy level = 1 electron second energy level = 5 electrons

• first energy level = 2 electrons second energy level = 4 electrons

• first energy level = 3 electrons second energy level = 3 electrons

• first energy level = 4 electrons second energy level = 2 electrons 

A flashlight bulb connected to a 6-V battery draws a 0.5-A current. What is the power used by the flashlight bulb? 

• 25 W 

• 3 W

• 6.5 W 

• 12 W

Which process is represented by the following description: “sugar is added to water and a sweet liquid results after stirring”?

• melting

• dissolving

• evaporation

• oxidation

Which of the following is an example of a situation in which exothermic chemical reactions occur?

• Ice cubes melt into water

• Boiling pots of water turn to steam

• Fireworks explode during a holiday.

• Pieces of KCl dissolve in water.

Tags

NGSS.MS-PS1-4

Soft drinks consist of a mixture of water, sugar, and flavoring, with carbon dioxide gas bubbled through it. Which of these ingredients would be considered the solvent?

• water

• sugar

• flavoring

• carbon dioxide

As you move from left to right across a row of elements in the periodic table, what happens to the number of neutrons in a typical atom?

• It stays the same

• It increases

• It decreases

• It decreases until you reach the middle and then it increases.

In a restaurant kitchen, lamps are used to keep food warm. Which type of electromagnetic radiation do the lamps emit that is primarily responsible for keeping the food warm?

• gamma

• infrared

• ultraviolet

• visible

Aluminum oxide, Al₂O₃, is produced by combining Al³⁺ and O^2-particles. What type of compound has been formed?

• covalent

• ionic

• metallic

• molecular

Tags

NGSS.MS-PS1-1

A toaster is plugged into a wall outlet that has a voltage of 110 volts. If the toaster’s resistance is 10 ohms, what current runs through the toaster?

• 10 amperes

• 11 amperes

• 100 amperes

• 1100 amperes