Thinking and Working Scientifically Stages 9

Why do scientific models sometimes change?

• They are always wrong.

• New evidence can provide a better understanding.

• Scientists prefer different models.

• Models are always based on guesses.

What is the role of an analogy in science?

• To make science more complicated

• To help explain scientific concepts using familiar ideas

• To replace models

• To eliminate the need for experiments

Which is an example of a scientific model used to describe atomic structure?

• Solar System analogy

• Water cycle

• Evolutionary tree

• Chemical bonding

What is a limitation of using models in science?

• They are always accurate

• They can simplify complex systems, missing some details

• They provide real-time solutions

• They are always widely accepted

In chemical equations, what does a symbol typically represent?

• A physical property of a substance

• A specific element or compound

• A measurement

• The number of molecules in a reaction

What is a key characteristic of a testable hypothesis?

• It is always correct.

• It can be supported or refuted through experimentation

• It needs to be theoretical.

• It doesn't require data.

Which of the following is a testable hypothesis?

• All humans will be happier in the future.

• Increasing sunlight will increase plant growth rate.

• Planets have emotions.

• People are more intelligent in urban areas.

Which of the following is an example of unexpected results leading to a scientific breakthrough?

• Discovery of penicillin from mold growth

• The conclusion that the Earth is flat

• Identifying Mars as a moon of Earth

• Predicting the exact future

How do unexpected scientific results usually contribute to knowledge?

• They are ignored

• They lead to more focused experiments to explore new theories

• They prove old theories are wrong

• They are quickly discarded

What should a scientific prediction be based on?

• Guesswork

• Random assumptions

• Existing scientific knowledge and evidence

• Hunches