Jack and Darell are playing tug-of-war. Jack is pulling on one end of a rope with a force of 230N. Darell is pulling on the other end of the rope with a force of 300N. Assume all other forces on the rope are balanced. Which statement describes the forces on the rope?

the forces are unbalanced, so there is a net force on the rope

the forces are balanced, so there is no net force on the rope

An ice cube is floating in a glass of water. Earth's gravity is pulling down on the ice cube with a force of 0.1N. The water is pushing up on the ice cube with a force of 0.1N. Assume all other forces on the ice cube are balanced. Which statement describes the forces on the ice cube?

The forces are balanced, so there is no net force on the ice cube.

The forces are unbalanced, so there is a net force on the ice cube.

Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force. Consider the following force: Edgar is pushing on his friend's wheelchair. According to Newton's third law, what other force must be happening?

The wheelchair is pushing on Edgar.

The wheelchair is pulling on Edgar.

Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force. Consider the following force: Michelle's hand is pushing on a door. According to Newton's third law, what other force must be happening?

The door is pushing on Michelle's hand.

The door is pulling on Michelle's hand.

Select the cold desert ecosystem. Submit

This ecosystem has: a small amount of rain or snow dry, thin soil long, cold winters

This ecosystem has: warm, wet summers and cold, wet winters soil that is rich in nutrients only a few types of trees

This ecosystem has: year-round rain and warm temperatures soil that is poor in nutrients many different types of organisms

Select the tropical rain forest ecosystem.

This ecosystem has: year-round rain and warm temperatures soil that is poor in nutrients many different types of organisms

This ecosystem has: warm summers and warm winters a rainy season and a dry season soil that is poor in nutrients

This ecosystem has: hot summers and cool winters a medium amount of rain soil that is rich in nutrients

Before sunrise on November 14, 1963, the crew of the fishing boat Isleifur II had just finished putting their fishing lines in the ocean off the southern coast of Iceland. As the crew waited to have breakfast, a strong smell of sulfur drifted over the boat. At first, crew members thought that the cook had burned the eggs or that something was wrong with the boat's engine. But when the sun started to rise, the crew saw black smoke billowing from the water a few kilometers away. The captain of the Isleifur II first thought the smoke was coming from a boat that was on fire, so he sailed closer to try to help. But as the Isleifur II approached the column of smoke, the captain and crew saw glowing pieces of molten rock shooting up out of the water. The captain realized this was not a burning boat. It was a volcano erupting under the water! According to the text, what evidence of a volcanic eruption did the captain observe?

He smelled sulfur and saw pieces of molten rock shooting out of the water.

He saw a nearby boat that was on fire.

He heard a report on the radio warning about a volcanic eruption.

When the island of Surtsey first formed, it was sterile , which means that it did not have any living organisms on it. Hot rocks and ash covered the island's surface, and toxic gas and lava flowed out of the volcano. After the volcano stopped erupting, organisms started to live and grow on Surtsey. The number and type of organisms that lived on the island changed over time in a process called succession. Succession happens when the number or type of organisms living in an environment changes. Surtsey experienced a type of succession called primary succession. Primary succession happens when the environment starts out as sterile. From the time that Surtsey formed, the government of Iceland has wanted to make sure that humans do not interfere with the process of primary succession. So, the only human visitors allowed on Surtsey are scientists who study primary succession. What makes Surtsey a good place to study primary succession? Select all that apply.

The island was sterile when it first formed.

The island has been protected from most human visitors.

The island contains organisms that were able to grow while the volcano was erupting.

No organisms are able to survive on the island.

Science-3/6/2021

Quiz

•

Science

•

6th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS2-2, MS-LS2-1, MS-ESS2-5

+5

Standards-aligned

TuongLinh Nguyen

Used 6+ times

FREE Resource

6 centimeters

6 kilometers

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Science-3/6/2021

29 questions

How long is a pen? Select the best estimate.

How long is a car? Select the best estimate.

How long is the Red Sea? Select the best estimate.Submit

How long is a road from one end of a city to the other? Select the best estimate.

How long is a bus route across a small town? Select the best estimate.

How long is a basketball court? Select the best estimate.

How long is an apple seed? Select the best estimate.

What is the temperature of the air inside of a classroom? Select the better estimate.

What is the temperature of a pot of boiling water? Select the better estimate.

What is the temperature of the water in a hot bath? Select the better estimate.

Access all questions and much more by creating a free account

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How long is the Red Sea? Select the best estimate.

Submit