Physical Science EOC

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 

Tags

NGSS.MS-PS1-1

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

• 1.25 W 

• 3 W

• 6.5 W 

• 12 W

An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? 

• 29

• 35

• 64

• 93

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

• melting

• dissolving

• evaporation

• oxidation

Tags

NGSS.5-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

What number should precede H2 in the chemical equation below in order for the equation to be balanced? ___ H2 +N2 -----> 2NH3

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

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

Tags

NGSS.MS-PS4-2

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.HS-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