Unit 1 Test Review

In the classroom during a visual inspection of a rock, a student recorded four statements about the rock. Which statement about the rock is an observation?

• The rock formed deep in the Earth's interior

• The rock cooled very rapidly.

• The rock dates from the Precambrian Era.

• The rock is black and shiny.

In order to make observations, an observer must always use

• experiments

• the senses

• proportions

• mathematical calculations

Which procedure is an example of classifying observed data?

• grouping stars by brightness

• graphing temperature versus time for a particular date

• photographing the cloud cover for a location throughout 1 week

• measuring the angle of Polaris from two different locations

A student classifies several objects. The classification system should be based on

• interpretations

• hypothesis

• inferences

• observations

A 25-gram sample of halite was placed in a jar with five other mineral samples and water. The jar was shaken vigorously for 5 minutes. The halite sample was the found to have a mass of 15 grams. What was the rate of weathering of the halite sample?

• 0.50 g/min

• 2.0 g/min

• 3.0 g/min

• 10.0 g/min

The grouping of objects or events based on similar characteristics is called

• observation

• interpretation

• measurement

• classification

Which event is most predictable?

• The Sun rises.

• An earthquake occurs.

• A meteorite falls to Earth.

• Coral fossils are found on mountaintops.

A rock sample has a mass of 16 grams and a volume of 8 cubic centimeters. When the rock is cut in half, what is the volume and density of each piece?

• 8 cm³ and 0.5 g/cm³

• 8 cm³ and 1.0 g/cm³

• 4 cm³ and 2.0 g/cm³

• 4 cm³ and 4.0 g/cm³

The best example of an inference is a

• reading of atmospheric pressure

• measurement of air temperature

• weather forecast for 3 days

• determination of dewpoint temperature

While walking on a glacier, an observer makes several statements. Which statement is an inference?

• "Some of the snow on this glacier is powdery."

• "The rocks on this glacier are of different sizes."

• "There are many cracks in this glacier."

• "Some parts of this glacier will start melting this spring."