Review

Scientists study a fossil of an extinct fish. The scientists compare the extinct fish to fish that are living today.

Which of these is the best conclusion the scientists can make about the extinct fish?

• The extinct fish had fins on its body similar to the fins on many fish that are living today.

• The extinct fish had many predators, similar to many fish that are living today.

• The extinct fish had stripes on its skin similar to the stripes on some fish that are living today.

• The extinct fish could live for many years, similar to some fish that are living today.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Students build a model rocket. The rocket uses a dissolving antacid tablet for power. The students want to know if the size of the pieces of antacid tablet affects the distance that the rocket flies.

Students pour 20 milliliters of tap water into the rocket. Then they add half an antacid tablet to the water and close the rocket. They launch the rocket and measure the distance it flies. The diagram shows the materials used.

Which change will help the students answer their question?

• Repeat the same process three times to improve precision.

• Use a full antacid tablet for the trial instead of half an antacid tablet.

• Do several trials, adding half an antacid tablet to different amounts of water.

• Do one trial using half an antacid tablet broken into a few pieces and one trial using a powdered half of an antacid tablet.

Tags

NGSS.MS-PS2-2

A glass contains 300 grams of water. A student puts 25 grams of sugar in the water. The student then stirs the water until the sugar is no longer visible.

What is the mass of the mixture in the glass?

• 275 grams

• 325 grams

• 300 grams

• 25 grams

Tags

NGSS.MS-PS1-5

Some plants were planted outside in Tennessee in January. The plants did not germinate. The plants most likely did not grow because

• the soil temperature was too high.

• the soil contained too many nutrients.

• the soil did not receive enough direct sunlight.

• the soil did not receive enough moonlight in the evening.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How do plants grow differently in March compared to September?

• As the days become steadily longer, plants grow better in Tennessee.

• As the days become steadily shorter, plants grow better in Tennessee.

• As Earth travels farther from the sun, plants grow better in Tennessee.

• As Earth travels closer to the sun, plants grow better in Tennessee.

Tags

NGSS.MS-LS1-5

Which of these most likely describes a behavior that an animal learns and is not an instinct?

• A moth keeps flying around a bright light many times.

• A kitten makes purring sounds as a mother cat cleans its fur.

• A dog sits quietly and waits while its owner opens a bag of dog treats.

• A sea turtle returns to the location where it was hatched and lays its eggs there.

Two identical basketballs in two different continents are dropped from the same height above the ground.  Basketball 1 is located in North America in the Northern Hemisphere.  Basketball 2 is located in Australia in the Southern Hemisphere.

Which two statements are correct about the gravity acting on Ball 1 and Ball 2?

• Earth’s gravity causes the balls to fall away from each other.

• Earth’s gravity causes the balls to fall directly toward each other.

• Earth’s gravity causes both balls to experience a force directed toward Earth’s center.

• The gravity acting on Ball 1 points to the same location as the gravity acting on Ball 2.

• The gravity acting on Ball 1 points in the same direction as the gravity acting on Ball 2.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The diagram shows fossils in rock layers. Rock layer 5 formed first.

Which of these correctly compares the age of the fossil in rock layer 3 to fossils in the other rock layers?

• The fossil in rock layer 3 is younger than the fossils in rock layers 1 and 2.

• The fossil in rock layer 3 is the same age as the fossils in rock layers 2 and 4.

• The fossil in rock layer 3 is younger than the fossil in rock layer 2 and older than the fossil in rock layer 5.

• The fossil in rock layer 3 is older than the fossil in rock layer 2 and younger than the fossil in rock layer 5.

Tags

NGSS.MS-ESS1-4

A student performs an experiment. The student wants to study the fastest way to dissolve sugar in tea. The student uses 50 milliliters of tea and adds 50 grams of sugar cubes for each trial. The student waits two minutes before making the observations shown in the table.

How can the experiment be changed to be sure that as much sugar as possible has dissolved?

• Use less water at all three temperatures.

• Stir the tea constantly at all three temperatures.

• Use larger sugar cubes in the 40°C tea.

• Use a larger cup to hold the 50°C tea.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4