2018-2019 2nd 9 weeks test review-Science

Which gas is released during photosynthesis?

• carbon dioxide

• hydrogen

• nitrogen

• oxygen

Tags

NGSS.MS-LS1-6

Which action is only a physical change?

• cooking pancakes

• frying eggs

• chopping vegetables

• burning a candle

Ladybugs can be used to decrease the number of aphids in gardens. A gardener adds 1,500 ladybugs to a garden. How will more ladybugs in the garden affect aphids and their consumers?

• Aphids will increase, causing their consumers to increase.

• Aphids will decrease, causing their consumers to increase.

• Aphids will increase, causing their consumers to decrease.

• Aphids will decrease, causing their consumers to decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A student reads that a river and a sea are moving bodies of water. The river water has a lower salt level than seawater.

Which organism can the student expect to find around the river?

• starfish

• shark

• octopus

• heron

Tags

NGSS.MS-LS2-1

A student rolls a basketball across the floor with different amounts of force. Which statement BEST describes the motion of the basketball?

• The basketball moves fastest when the largest balanced force is applied.

• The basketball moves fastest when the smallest balanced force is applied.

• The basketball moves fastest when the largest unbalanced force is applied.

• The basketball moves fastest when the smallest unbalanced force is applied.

Tags

NGSS.MS-PS2-2

A student adds a 10 g antacid to a cup with 50 g of water and immediately sees bubbles. The student records the change in total mass every 5 seconds for 20 seconds in a table.

Which is the BEST conclusion for the change in total mass?

• The release of gas into the air creates a change in mass.

• Errors in measurement show a decrease in mass.

• Mixing substances causes a decrease in mass.

• Errors in measurement show an increase in mass.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student uses the setup shown to perform an experiment.

The student observes that as marble chips are dissolved in the weak acid, the color of the acid changes, and bubbles start to form. The student also notices that the flask is warm to touch.

What evidence identifies the type of change taking place in the experiment?

• The rise in temperature indicates a physical change.

• The change of phase of the marble chips indicates a chemical change.

• The dissolving marble chips indicate a physical change.

• The rise in temperature indicates a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Myla pushes a dresser filled with clothes. She removes the drawers from the dresser and continues pushing the dresser with the same force.

How will removing the drawers affect the motion of the dresser?

• The dresser will move slower due to the decrease in mass.

• The dresser will move faster due to the decrease in mass.

• The dresser will move slower due to the increase in gravity.

• The dresser will move faster due to the increase in gravity.

Tags

NGSS.MS-PS2-2

The diagram shows the sizes of sugar crystals from four different brands of sugar labeled W-Z.

Which sugar crystal brand would take the LONGEST to dissolve in a warm liquid?

• brand w

• brand x

• brand y

• brand z

Tags

NGSS.MS-PS3-4

A student has two different metal samples that are the same size and shape. Which action should the student perform to determine which metal has the GREATEST density.

• Determine the solubility of each metal with a beaker of water.

• Determine the hardness of each metal by scratching each with an iron nail.

• Determine the mass of each metal with a balance.

• Determine the volume of each metal with a ruler.