EOG Science

A researcher analyzes the water in a stream and observes that the water contains many snails, crayfish, shrimp, caddisflies, mayflies, and stoneflies. These organisms are invertebrates that are used as bioindicators for bodies of water.

What can be concluded correctly about the water in the stream?

• A. The presence of any living organisms indicates the water is safe to drink.

• B. The presence of many different types of invertebrates indicates the water is polluted.

• C. The presence of insects indicates that decomposition is taking place in the water.

• D. The presence of a variety of invertebrates indicates that the water is suitable for aquatic life.

Tags

NGSS.MS-LS2-4

Examine the diagram of a food web. A small population of eagles is introduced in the food web. The eagles feed on mice and reproduce at high rates. What is the most likely consequence of the introduction of eagles in the food web?

• The eagles will coexist with the hawks.

• The hawks will prey on grasshoppers.

• The eagles will compete with the hawks.

• The hawks will establish a mutualistic relationship with mice.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Use the diagram that shows a river basin with three parts labeled X, Y, and Z to answer the question.

Which option correctly identifies the parts of the river basin labeled X and Y?

• X: river; Y: tributary

• X: tributary; Y: estuary

• X: tributary; Y: river

• X: river; Y: estuary

Tags

NGSS.MS-ESS2-4

In 1911, a small population of 25 reindeer was introduced on Saint Paul Island. The graph shows the increase in the population of reindeer on the island between 1911 and 1940 with four lines (W, X, Y, and Z) that represent the estimated reindeer population by 1950. If the reindeer population overgrazed their food supply in 1940, which line would likely represent the estimated population of reindeer on the island by 1950?

• W

• X

• Y

• Z

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which are sources of freshwater on Earth’s surface?

• A. atmosphere, rivers, swamps, soil, and living things

• B. aquifers, atmosphere, estuaries, rivers, and soil

• C. rivers, aquifers, swamps, soil, and oceans

• D. oceans, atmosphere, rivers, soil, and living things

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

A substance with a mass of 10 g is heated to produce two new substances. The mass of the first new substance is 9.3 g and the mass of the second new substance is 0.7 g. Which of the following is best demonstrated by this example?

• heat transfer

• physical change

• law of conservation of mass

• law of conservation of energy

Tags

NGSS.MS-PS1-5

The diagrams below represent different ways heat is transferred. The arrows in the diagrams show the direction of heat transfer.

Which table shows the primary way heat is transferred in each diagram?

• 
• 
• 
• 

Which of the following statements is true? 

• Balanced forces cause a change in motion. 

• Unbalanced forces cause a change in motion. 

• Forces do not effect the change in motion. 

Tags

NGSS.MS-PS2-2

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass

• Friction and movement

• Mass and Movement

• Height and Friction 

Tags

NGSS.MS-PS3-2

When alleles are the same (ex: YY or yy)

• heterozygous

• recessive

• homozygous