LEAP Practice Week 1

In which numbers does the digit 4 have a value 10 times greater than the place value of 4 in 6,245?

Select the two correct answers. 

• 4,590

• 8,204

• 8,245

• 8,440

• 8,499

A machine sorts pieces of mail. On Tuesday, the machine sorted eight thousand ninety-seven pieces of mail. Written in standard form, how many pieces of mail did the machine sort on Tuesday?

(Do NOT use a comma)

Sofia's favorite basketball player scored a total of 14,082 points in his career. How many points did Sofia's favorite basketball player score rounded to the nearest thousand?

• 10,000

• 14,000

• 15,000

• 20,000

Subtract: 5,314 - 4,938

• 1,624

• 376

• 375

• 1,376

Use the information provided to answer Part A and Part B for the following question. The table below shows the number of points scored by three video game players. 

                                                             

           

Part A: What is the total number of points scored by Player 2 and Player 3? 

(Do NOT use a comma)

Part B: How many more points does Player 1 have than the combined points of Player 2 and Player 3?

(Do NOT use a comma)

Devils Tower is a landform in Wyoming that was buried underground for millions of years. About 5 million years ago, several processes occurred that resulted in Devils Tower being partly below the ground and partly above the ground, as shown in the figure.

Which statement best explains one of the layers of rock around the landform?

• Layer Y was once lava.

  The only information we have about Layer Y is that the rocks were made of salt. The presence of salt is not evidence of lava.

• 
  Layer Z was once an ocean.

  Layer Z only contains rocks made of silt, salt, and sand but no fossils. If Layer Z were an ocean, we should see fish fossils.

• Layer Y is younger than Layer X.

  Layer Y is older than layer X. This is because older rock layers are formed first and then newer rock layers are formed on top. So, when looking at the age of rock layers, it is very important to remember that older layers are on bottom.

• Layer X was once under the ocean.  

  Correct! We know that the ocean has salty water and fish and the rock layer contains salt and fish fossils, this indicated that the environment when Layer X was formed was probably once an ocean.

A teacher models how rainfall causes erosion on hillsides. She places two plastic containers on a table. She builds a hill made of firm clay soil in one container. She then builds a hill made of loose loam soil in the other container. She pours water onto the top of each model hill.

The setup is shown in the diagram.

Which statement best explains the difference in erosion patterns?

• 
  Loose soil erodes faster because it absorbs more water.

  Erosion is defined as a process that moves weathered rock. Since the soil is not being moved when water is absorbed, this cannot be an example of erosion.

• Firm soil erodes more slowly because water flows into the soil more slowly.

  Erosion is defined as a process that moves weathered rock. Since the soil is not being moved when water is flows into the soil, this cannot be an example of erosion.

• Loose soil erodes faster because soil particle float on the surface of the water.

  Correct! Erosion is defined as a process that moves weathered rock. Since the soil is floating on the water, it will be carried away when the water moves!

• Firm soil erodes more slowly because is is more difficult for water to break soil particles apart.

  Erosion is defined as a process that moves weathered rock. The breaking apart of soil by the water is an example of weathering (a process where rocks are broken into smaller pieces), not erosion.

The locations of mountain ranges are shown on the map.

Which pattern describes the locations of the mountain ranges shown on the map?

• Most mountain ranges are found along ocean and continent boundaries.

  Correct!

• Most mountain ranges are found on islands.

  This map shows mountains on continents. There are no islands shown with mountain ranges on this map (Australia is considered a continent!). This would indicate that most mountain ranges are on continents and not islands.

• Most mountain ranges are found where two oceans meet.

  On this map, the most mountains look to be on the west side (left) of North America and South America, which is one continuous ocean called the Pacific Ocean. You can also see a lot of mountains in Europe and Asia, many of which are not near oceans.

• Most mountain ranges are found near the equator.

  The equator is the dashed line that runs left to right on the map. It looks like there are a lot of mountains north of the equator and not along the equator.