Benchmark 3 (20-21) Review

A student is given two containers filled with two substances, A and B.

The student classifies substance A as a solid and substance B as a liquid. What evidence supports the classifications?

• Substance A has a greater mass than substance B.

• Substance B takes up more volume than substance A.

• Substance B has a rigid structure, and substance A flows.

• Substance A has a fixed shape, and substance B takes the shape of the container.

The image shows a food web.

In which ecosystem do the organisms in the food web most likely live, and why?

• Lake; the organisms can only survive in a small freshwater space.

• Pond; the organisms need a small saltwater area to live.

• Salt marsh; the organisms live in shallow, salty water with direct sunlight.

• Ocean; the organisms are large and need open space to live.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A student finds a mineral and wants to know about its properties. The student makes a chart to record predictions before testing.

Which test result is different from the student’s predictions?

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Tags

NGSS.MS-PS1-2

A student is designing a boat to carry ten marbles across water. The student designs a boat, and it sinks when five marbles are added.

Which question will help the student improve the boat?

• Are marbles more dense than water?

• What can decrease the density of the boat?

• How deep is the water in the container?

• Do ten marbles weigh more than five marbles?

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which statement best describes Earth’s gravity?

• Gravity is a force that pulls all objects down to Earth’s surface.

• Gravity is the result of an object pushing on Earth’s surface.

• Gravity is the motion of Earth that causes objects to fall to Earth’s surface.

• Gravity is a force that pushes objects down to Earth’s surface.

Tags

NGSS.MS-PS2-4

A student creates a saltwater solution by mixing salt and water. Which statement best describes how to find the mass of the saltwater solution?

• Divide the mass of the water by the mass of the salt.

• Multiply the mass of the water by the mass of the salt.

• Subtract the mass of the salt from the mass of the water.

• Add the mass of the salt to the mass of the water.

What is true about molecules and atoms?

• Molecules capture atoms for energy.

• Molecules create atoms from nothing.

• Molecules can be broken down into atoms.

• Molecules attach to form atoms.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

A student has a mixture of sand and gravel that needs separating. The student pours the mixture through a filter. The sand and gravel both get stuck in the filter and do not separate. Which action should the student take to separate the mixture successfully?

• Sifting; the smaller sand will fall through the sifter, and the larger gravel will stay in the sifter.

• Evaporation; the sand will evaporate, and the gravel will stay in the container.

• Flotation; the gravel will float on the top of the water, and the sand will sink to the bottom.

• Magnetic attraction; the gravel will stick to a magnet, and the sand will stay in the container.

A student mixes equal amounts of water with different amounts of baking soda in four beakers, as shown.

Which solution has the highest concentration of baking soda?

• solution 1

• solution 2

• solution 3

• solution 4

Tags

NGSS.MS-PS1-2

A student places three ring-shaped magnets on a plastic peg, as shown.

Which statement about the force that causes the magnets to be separate on the

plastic peg is correct?

• The force is a contact force that pulls objects.

• The force is a noncontact force that pushes objects.

• The force only acts on objects that touch plastic.

• The force pulls objects toward the ground.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5