8th review staar

What causes day & night?

• Earth's rotation on the equator

• Earth's revolution around the Sun

• The Moon's rotation around the Sun

• Earth's rotation on its axis

What Spectral Class is star A

• M

• K

• G

• F

Our Sun is a G class star with a luminosity of 1. Which star on the HR diagram would be the closest in temperature and brightness?

• A

• B

• C

• D

• Star 1 is cooler and less bright than Star 2.
• Star 1 is hotter and brighter than Star 2.
• Star 1 is cooler and brighter than Star 2.
• Star 1 is hotter and less bright than Star 2. 

According to this food web, which organisms would the bobcat and diamondback rattlesnake compete for if the mouse population and swamp rabbit population decreased?

• Raccoon and sparrow

• Raccoon and Eastern cottontail rabbit

• Sparrow and seeds

• Sparrow and Eastern cottontail rabbit

Which observation would indicate that a chemical reaction occurred?

• The vinegar took the shape of the container in step 1.

• The steel wool sank into the vinegar in step 3.

• The temperature of the vinegar increased during step 4.

• The steel wool changed shape during step 6.

According to this map, a cold front is moving through which state?

• New Mexico

• Illinois

• Oregon

• Nevada

The Loop Current includes warm water flowing at deep depths. Scientists hypothesize that the Loop Current may be the most significant source of energy for hurricanes in the Gulf of Mexico. Which would be the MOST likely reason to study the Loop Current?

• to help predict the paths of hurricanes as they move from the Gulf of Mexico to the Atlantic Ocean

• to help understand the relationship between deep, warm water currents and hurricane intensity

• to help predict the changes in the fish population during hurricane season

• to help understand the tides during hurricane season

Certain movements of oceanic plates cause the formation of new crust on the ocean floor. Which plate movement would result in the formation of new crust?

• one oceanic plate sliding past another

• one oceanic plate slipping beneath another

• two oceanic plates colliding against each other

• two oceanic plates pulling away from each other

Based on the diagram, which of these conclusions about Star 1 is MOST likely correct?

• it is hot and dim

• it is cool and dim

• it is hot and bright

• it is cool and bright