Unit 1 Practice Of Science

While speaking to a colleague, a scientist makes the following statement: "I propose that Bald Eagle eggs in northern Maine will have thinner shells than those from birds in southern Alaska due to increased levels of pesticides in the water." This statement is a

• theory
• law
• conclusion
• hypothesis

Scientific theories can be tested.

• True
• False

Tags

NGSS.HS-PS2-1

Scientific theories are based on

• general assumptions of how systems work.
• mathematical principles that can be proven true.
• large amounts of data collected over time.
• observations from within only one scientific discipline.

Tags

NGSS.MS-ESS2-2

NGSS.MS-LS4-1

Scientific theories do not change once they have been written down.

• True
• False

Which statement correctly identifies the difference between laws and theories?

• Laws are a statement of fact, while theories are a statement of opinion.
• Laws explain why phenomena exist, while theories explain how.
• Laws are a prediction of phenomena, while theories are an explanation.
• Laws describe phenomena, while theories explain why phenomena exist.

These can change when new evidence is presented

• theory

• law

Tags

NGSS.MS-LS4-2

Universal gravitation, and Conservation of Mass and Energy are examples of

• Theory

• Law

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound

Research Question: Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?

• Type of gasoline
• which car the gas is put into
• how fast the car can drive
• how much gas is put into the car

Which activity requires a scientist to use creativity?

• observing the behavior of a mouse in a maze

• measuring the distance an object travels during an experiment

• designing an experiment to test the relationship between force and slope

• repeating an experiment several times to determine whether the results are valid