In a scientific investigation, it is important that the number of objects or events being sampled be

• equal to the mean number of objects or events not sampled.

• a guess of how likely an unwanted outcome will occur.

• equal to the total statistical population.

• large enough to give an accurate estimate for the whole population.

A diorama is an example of a _____ model.

• graphical

• mathematical

• conceptual

• physical

What essential characteristic does a good experiment have?

• A control group is given the experimental treatment.

• A single variable is tested.

• A control is used.

• A single variable is tested and a control is used.

Tags

NGSS.MS-PS2-5

An example of a(n) ____________________ model is a flow chart showing how water moves between the atmosphere and Earth’s surface.

• GIS

• physical

• mathematical

• conceptual

The procedure used by scientists to find a cause and effect relationship is the ________.

• standard deviation

• correlation

• experimental method

• model synthesis

Which of the following is an example of qualititative data?

• the length of blue gill fish found in a lake

• a graph showing the amount of rain in the Bengal jungle

• a recording of the whale songs

Which of the following is an example of quantitative data?

• Pictures of lions hunting deer

• The average temperatures of the Padagonia grassland

• Descriptions of flowers blooming on a barrel cactus

Which statement is relevant evidence?

• There are 1,530 Lake Erie Water snakes found in Ohio.

• Many older women drink tea.

• I think these plants are strongest.

What are good examples of evidence to help support your claim?

• Research and survey results

• Expert opinions

• Statistics

Which of the following questions cannot be answered by scientists?

• Is this painting beautiful?

• How does an engine work?

• How do trees produce food?

• What is a star?