Science Leap Review

Which statement BEST describes the distribution of water on Earth?

• Most of Earth's water is stored in the oceans.

• Most of Earth's water is frozen in the polar ice caps.

• Most of Earth's water is flowing in streams and rivers.

• Most of Earth's water is trapped in underground aquifers.

Tags

NGSS.MS-ESS2-4

A herring gull dies in the saltwater marsh. Put the following steps in the correct order to model how the matter from the dead herring gull is moved in a saltwater marsh.

• A, B, C, D

• D, C, B, A

• D, B, C, A

• B, C, A, D

Tags

NGSS.MS-LS2-3

Which statement best supports the answer to Question 3?

• Because the nutria eat the cordgrass, the diamondback terrapin has fewer plants to eat.

• Because the nutria eat the cordgrass, the periwinkle has less of its main food source available.

• Because the otters lose the ability to hide in the cordgrass, their predators are more likely to prey on them.

• Because the cordgrass provides less shade, the sheepshead minnows are easier for the herring gulls to see and catch.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

A student reads the following information about smooth cordgrass in a science magazine. *It is one of the few plants that grow in the tidal zone of saltwater marshes. *It can grow to heights ranging from 6 inches to 7 feet tall. Figure 1 shows a cross section that compares cordgrass heights in the tidal zone of a saltwater marsh. The tidal zone moves water around. This removes some of the dangerous substances that can keep plants from growing. A student wants to know the ideal conditions for smooth cordgrass growth. Based on the information in Figure 1, which question is best for the student to investigate?

• Does cordgrass need a certain type of soil to grow taller?

• Does cordgrass need to have its seeds spread by a certain animal?

• Does cordgrass need to have a certain depth of water to grow leaves?

• Does cordgrass need a certain amount of salt in the water it grows in?

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Conduct experiment

Ask a question

Communicate results

Draw conclusions

Form a hypothesis

Big Sur, California, is located right next to the Pacific Ocean. The area of Big Sur has many steep cliffs and slopes. Major landslides happened there in 1998, 2000, and 2017. Landslides take place when rocks and soil move downward. Roads can be covered with rock, and parts of a road can fall into the ocean. People cannot drive through the area until soil and rocks are removed or the road is replaced. Landslides are less likely to happen on stable slopes. On stable slopes, the upper layers of rock are connected to and supported by the bottom layers of rock, as shown in Figure1. Slopes become unstable when layers of rock become separated from one another. This can happen when water fills the cracks between rocks. A student claims that landslides are caused by the downward force of gravity. Which statements provide evidence to support the student’s claim? Select the TWO correct answers.

• Big Sur has very steep cliffs.

• Falling rocks can cover a road.

• Rocks and soil can block traffic.

• Rock layers push against each other.

• Parts of a road may fall into the ocean.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

NGSS.MS-PS2-5

A hiker kicks the loose rock and observes that, two minutes later, the rock has rolled to the bottom of the slope. Which statement best explains the hiker’s observations?

• Gravity pulled the rock downward only when the rock bounced over objects on the slope.

• Gravity pulled the rock straight down the entire time, which caused the rock to move downward

• Gravity pulled the rock at an angle along the ground some of the time to cause the rock to move on the slope

• Gravity pulled the rock in different directions at certain times, which caused the rock to move downward without getting stuck in the grass.

Tags

NGSS.MS-PS2-4

Put the following statements in the correct order to model the sequence of events that causes a landslide.

• D, B, C, A

• B, D, C, A

• B, C, D, A

• C, D, A, B

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

Daniel was playing with a glow stick and noticed that something inside the glow stick seemed to break when he bent it. He researched how a glow stick works and found this information. (see image)

What causes the glow stick to produce light?

• A new material is formed when the glass mixes with Chemical W.

• A new material is formed when the glow stick's temperature changes.

• A new material is formed when Chemical X and Chemical W are shaken.

• A new material is formed when Chemical X is mixed with Chemical W.

Tags

NGSS.MS-PS1-2

Which evidence BEST supports the answer to question 12?

• The glow stick is brighter in cold temperatures.

• The glass capsule is broken and cannot be fixed.

• The glow stick produces light right after the two chemicals are mixed.

• The two chemicals are separated inside a solid container.

Tags

NGSS.MS-PS1-2