Winter Review

Two wires carrying electricity can create a spark if they come too close together. This spark can start a fire. Wires carrying electricity are usuallly covered  with plastic to keep them from starting a fire. Why does the plastic keep electricity from starting a fire?

• Plastic is a good insulator.
• Plastic can melt when heated.
• Plastic is softer than wire.
• Plastic conducts electricity.

Tags

CCSS.RI.3.3

CCSS.RI.4.3

CCSS.RI.5.3

CCSS.RI.6.3

CCSS.RI.7.3

Erosion is one of the processes involved in the formation of sedimentary rock. Which of these best describes the process of erosion?

• Rocks are broken into smaller pieces that remain in the same location.
• Pressure compacts layers of sediment and turns them into rock.
• Pieces of rock or soil are carried from one place to another.
• Sediment grains fall to the bottom of a lake to form sedimentary layers.

Tags

NGSS.MS-ESS2-2

A student made a list of activities that involve energy.  
-
1. Sharks chasing a school of fish
2. A toaster heating bread
3. A cell phone charging
4. A tree limb falling to the ground
5. Tomato plants absorbing sunlight
6. A canoe floating down a river
-
Which activities on the list are examples of the use of mechanical energy? 

• Activities 1, 4, and 6 
• Activities 2, 4, and 5
• Activities 1 and 2 
• Activities 3, 5, and 6 

Tags

NGSS.3-PS2-1

A student puts four objects in a bucket filled with water. The objects are listed below. 
-
 Plastic ball
Glass marble
Metal paper clip
Wood block 
-
Which two objects are most likely less dense than the water?

• Wood block and metal paper clip
• Plastic ball and glass marble
• Metal paper clip and glass marble
• Wood block and plastic ball

Tags

NGSS.5-PS1-3

The Smiths notice a bird flying into a window.  The bird flies into the window because light - 

• travels through the window
• reflects from the window
• refracts around the window
• reflects around the window

Tags

NGSS.MS-PS4-2

Which mixture can be separated using a coffee filter?

• rocks and sand
• sand and water
• lemon juice and water
• sand and iron filings

Tags

NGSS.5-PS1-4

What physical property of matter can be measured using the triple beam balance?

• length
• height
• volume
• mass

Which statement describes weather, rather than climate?

• The weather is usually hot and humid year around
• The destination has hot summers and cold winters
• The summer temperatures average between 29 and 35 degrees
• The humidity level on Tuesday was 30%

Tags

NGSS.MS-ESS2-5

• Removing Wire 1  
• Removing Wires 2 and 4  
• Removing Wires 2 and 5 
• Removing Wires 3 and 4  

• In which location does the caramel candy change state the fastest? 
• What causes the caramel candy to keep its shape?  
• Why does the caramel candy change state? 
• At what temperature does the caramel candy melt?