Science test

Qualitative Variable

Deals with descriptions that cannot be measured, e.g., mood of a class.

Quantitative Variable

Deals with numbers that can be measured, e.g., height of a person.

Water Displacement

A method to find the volume of an irregular solid by measuring the change in water level after the solid is submerged.

Mass (Metric Base Unit)

Grams (g) is the metric base unit for mass.

Volume (Metric Base Unit)

Milliliters (mL) or cubic centimeters (cm³) are the metric base units for volume.

Density of Water

1 g/mL is the density of water.

Sinking/Floating Principle

Objects more dense than the liquid will sink, objects less dense will float.

Bar Graph

Used for counted data to compare different groups, e.g., the number of students with a birthday each month.

Line Graph

Used to show trends or data over time, e.g., how the height of a plant changes over its lifespan.

Pie Graph

Used to show percentages to compare groups/categories, e.g., polling the % of students about their favorite pizza topping.

Independent Variable

The variable that is manipulated and is always on the X-axis.

Dependent Variable

The variable that is measured and is always on the Y-axis.

Control Group

The group that does not receive the treatment in an experiment and serves as a comparison.

Experimental Group

Groups that receive the treatment in an experiment.

Example of Constants

Aspects of an experiment that remain the same, e.g., the type of car used in a heat experiment.

Scenario Variables

IV: Paint color, DV: Temperature of car, Constants: type of car, time; Control Group: car with white paint.

Volume of a Cube

Volume can be found by multiplying length, width, and height; for example, 2 × 4 × 3 = 24.

Nitrogen in Earth's Atmosphere

The most abundant gas in Earth's atmosphere at 78%.

Percentage of Oxygen

Oxygen makes up 21% of Earth's atmosphere.

Difference in Nitrogen and Water Vapor

There is 76% more nitrogen than water vapor in Earth's atmosphere.