Physical Science Mid-Term Review

In which state, or states, of matter can particles expand to completely fill their container?

• I

• II

• III

• I, II, and III

Robert measured the air pressure in his bicycle tire, and it was low.

What can Robert do to increase the air pressure in his tire?

• increase the density of the air

• increase the volume of the air

• decrease the density of the air

• decrease the temperature of the air

What action will show that mass is conserved in this chemical reaction?

• comparing the types of products and reactants

• comparing the weights of the products and the reactants

• comparing the physical appearance of the products and reactants

• comparing the number of molecules in the products and reactants

Which of the following actions will increase the rate at which a sugar cube dissolves in water?

• stir the water before adding the sugar

• cool the water before adding the sugar cube

• cool the sugar cube before adding it to the water

• crush the sugar cube before adding to the water

What is the name of the compound CCl₄?

• carbon chloride

• cobalt chloride

• carbon tetrachloride

• monocobalt tetrachloride

What compound would be formed between the two ions modeled?

• BF₃

• BFI₃

• BaF₃

• BaFI₃

Which energy source listed provides the MOST energy while creating the LEAST amount of environmental pollution and why?

• biofuel; because it reduces the amount of waste in a landfill

• geothermal; because it can be harnessed anywhere on Earth

• nuclear; because it is a sustainable chain reaction

• petroleum; because it is a natural substance that is unlimited

Which ion has a charge of 2⁺?

• an ion with 10 protons, 10 neutrons, and 10 electrons

• an ion with 10 protons, 9 neutrons, and 8 electrons

• an ion with 8 protons, 9 neutrons, and 10 electrons

• an ion with 8 protons, 10 neutrons, and 8 electrons

Bleach is a base, which means its pH is...

• less than 7

• at 7

• greater than 7

• out of this world

Alkaline Earth Metals

...gain two electrons

...are found in Group 2 of the Periodic Table

...ions will be -2

...include elements Be, Mg, Ca

Which of the above statements is NOT true?

• gain 2 electrons

• found in Group 2

• ions will be -2

• includes Be, Mg, Ca