Scientists recorded the size of a population of house finches in a forest ecosystem from the years 1995 to 2005. The graph shows the POPULATION OF HOUSE FINCHES IN AN AREA that was recorded. What change in the limiting factors in the ecosystem could have caused the population change that occurred between 2001 and 2002?

• food supply increased

• number of nesting sites increased

• water supply increased

• disease increased

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Derick demonstrated a process that he learned in science class. He poured a small amount of sugar into a cup of water and then stirred it until the sugar disappeared. Which process did Derick demonstrate?

• how to separate components of a solution

• how dissolving a substance in liquids is an example of a chemical reaction

• how substances dissolve in liquids to produce a pure substance

• how two pure substances can be combined to form a solution

Jane did an investigation about the states of matter. As part of the investigation, Jane wanted to change a liquid into a solid. What must she do to bring about this change in state?

• Stir the liquid as quickly and thoroughly as possible

• Increase the energy of the liquid so that its particles move faster

• Place the liquid in a different container

• Remove energy from the liquid so that its particles slow down

Tags

NGSS.MS-PS1-4

When humans cut down woodlands to to harvest timber or clear the land for farms or ranches. The action of clearing a wide area of trees.

• drought

• desertification

• deforestation

• erosion

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

When an acid and a base are combined, a

  Neutralization happens in the form of a _______ and water.

• metal

• protein

• salt

• sand

Tags

NGSS.MS-PS1-5

What part of an atom has a negative charge?

• electron

• proton

• nucleus

• neutron

The middle of the atom, which contains protons and neutrons, is called _____.

• nucleus

• proton

• neutron

• electron

The illustration below shows three states of matter in separate jars.

Which statement about these jars is correct?

• Jar A contains a gas

• Jar B contains a liquid

• Jar C contains particles that vibrate in position

• Jars A and C have particles that move more than those in Jar  B

Tags

NGSS.MS-PS1-4

Adding powdered Gatorade to water makes a tasty solution. What is the solute in this example?

• Gatorade liquid

• water

• Gatorade powder

• Gatorade container

Using this density column, list the substances in order from LEAST dense to MOST dense

• Syrup, Oil, Water, Air 

• Water, Syrup, Oil, Air 

• Syrup, Water, Oil, Air 

•   Air, Oil, Water, Syrup

Tags

NGSS.MS-PS1-2