Science Midterm Review

Front

What type of bond is formed between Sodium and Bromine?

Back

Ionic bond: A bond formed when one atom transfers electrons to another, resulting in charged ions that attract each other.

Front

What energy transformation occurs in a toaster?

Back

Electrical → Thermal: The conversion of electrical energy into thermal energy to heat the toaster.

Front

In a cost model, what is the dependent variable when Paula pays a monthly fee plus a charge per movie?

Back

The money it costs: The total cost depends on the number of movies rented.

Front

In an experiment about rat diets, what is the dependent variable?

Back

Body weight: The weight of the rat is affected by the diet.

Front

What type of elements typically form cations?

Back

Metals: Elements that lose electrons to form positively charged ions.

Front

Define ionic bond.

Back

A type of chemical bond formed through the electrostatic attraction between oppositely charged ions.

Front

What is the role of a dependent variable in an experiment?

Back

It is the variable that is measured or tested in an experiment, affected by changes in the independent variable.

Front

What is an example of energy transformation in everyday appliances?

Back

In a blender, electrical energy is transformed into mechanical energy to blend food.

Front

What is the difference between metals and nonmetals in terms of electron behavior?

Back

Metals tend to lose electrons and form cations, while nonmetals tend to gain electrons and form anions.

Front

What is a covalent bond?

Back

A type of bond formed when two atoms share one or more pairs of electrons.