Comprehensive Science Review

Increasing the temperature of a chemical reaction increases the reaction rate. Which of the following statement explains why?

• Faster moving particles come in contact less often, which gives more chances for a reaction to happen.

• Faster moving particles come in contact more often, which gives more chances for a reaction to happen.

• Slower moving particles come in contact more often, which gives more chances for a reaction to happen.

• Slower moving particles come in contact less often, which gives more chances for a reaction to happen.

Tags

NGSS.MS-PS1-4

A scientist hypothesized that the temperature of which an alligator egg is incubated determines whether the alligator will be male or female. What is the test (independent) variable?

• the amount of mud

• the number of aquatic plants growing in the area

• the amount of salt in the mud

• the temperature of the mud

Tags

NGSS.MS-LS1-5

Why is there debate to develop scientific knowledge within the scientific community?

• Scientific debate is the only way to prove previous scientific findings were incorrect and should be ignored.

• Scientists debate because scientist believe their evidence is stronger than other scientist's evidence.

• Scientists try to disprove each others work to reduce conflict within the scientific community.

• Scientific debate is a necessary part of scientific evidence and plays an important role in confirming scientific findings.

Tags

NGSS.MS-LS2-4

NGSS.MS-PS3-5

Scientific knowledge results from the interaction of scientists who are investigating natural phenomena. Which of these BEST describe how a scientific explanation becomes widely accepted?

• A hypothesis is tested repeatedly and the results are confirmed and debated by the scientific community.

• It is debated by the scientific community.

• A hypothesis is tested repeatedly and the results of the tests are debated.

• A hypothesis is tested repeatedly and the results are mostly supported by the scientific investigations.

If a scientist makes a new discovery, why must other scientists review and replicate the results before the discovery can be published?

• New discoveries can only be debated after they are published and

  confirmed.

• Scientific knowledge must come from a great deal of debate and

  confirmation within the science community.

• Other scientists must like the new discovery before it can be published.

• New discoveries must be accepted by all members of the scientific

  community first.

Which of the following describes a limitation of the drawing but NOT a clay model?

• It cannot represent a living cell since the cytoplasm should be in constant motion.

• It does not contain the correct number of nuclei.

• It does not represent the main parts of a cell.

• It cannot represent a living cell since a true cell is 3-dimensional.

When discussing the theory of atoms, a model is the only option. Why is this true?

• An atom is too small to be observed in detail with current technology.

• Atoms are too expensive to collect for scientific use.

• An atom is too dangerous to handle in a lab setting.

• An atomic model is easier to manipulate than a real atom.

Tags

NGSS.MS-PS1-1

What is NOT a benefit of using a scientific model?

• It can be used to visualize a complex idea or concept.

• It can lose some accuracy in order to make it simple enough to use.

• It can represent something too small or large to manipulate.

• It can be safer, quicker, and less expensive for the scientist to work with.

Tags

NGSS.MS-ETS1-4

NGSS.MS-LS1-2

NGSS.MS-PS1-1

Through freezing and thawing, a boulder is broken into smaller pieces. What is this an example of?

• physical weathering

• chemical weathering

• abrasion

• deposition

Tags

NGSS.MS-ESS2-2

Which of the following is NOT an example of chemical weathering?

• oxidation

• frost heaving

• acid rain

• carbonation