2nd Semester Review

If a bicyclist travels 30 kilometers in two hours, her average speed is

• 30 km/h

• 60 km/h

• 15 km/h

• 2 km/h

In an experiment, which variable may change in response to the variable that is deliberately changed?

• The constant variable

• The dependent variable

• The experimental variable

• The independent variable

Which classification level is broader than the kingdom level?

• order

• class

• family

• domain

What is the gravitational potential energy of an object?

• The energy it has because of its height

• The energy it has because it is moving

• The energy it has because of its shape

• The energy it has because of its chemical makeup

A change in matter that produces one or more new substances is a

• natural change

• physical change

• chemical change

• break-down change

Table salt and water are examples of

• atoms

• elements

• mixtures

• substances

Which form of energy is described as the total amount of kinetic and potential energy of the particles in an object?

• electromagnetic energy

• mechanical energy

• nuclear energy

• thermal energy

In the laboratory, volumes of liquid are usually measured with a(n)

• electrode

• scale

• triple-beam balance

• graduated cylinder

One characteristic used to place organisms into kingdoms is

• how they move

• where they live

• their ability to make food

• their ability to reproduce

Which of the following examples of a wheel and axle most likely has the greatest mechanical advantage?

• key

• doorknob

• screwdriver

• steering wheel