Science Leap

Which statements best describe a design that will protect the roof of a house in an area with high winds? Select the two correct answers.

• The best design stops the greatest amount of wind from blowing across the roof.

• The best design allows the roof to stay on the house even when strong winds blow.

• The design of roof 1 is best, because wind blows past the walls of the house.

• The design of roof 2 is best, because no wind is trapped by the roof.

• The design of roof 3 is best, because very little wind is trapped by the roof.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Sam found a figure of animal fossils in rock layers.

Which claims can best be supported by the fossil record in the figure?

Select the two correct answers.

• The type of animal that formed fossil Y existed for only 50 million years.

• The type of animal that formed fossil W existed for the longest period of time.

• The type of animal that formed fossil X was the last of the animals to die out.

• The type of animal that formed fossil Y died out more than 350 million years ago.

• The type of animal that formed fossil X could be found on Earth more than 300 million years ago.

Tags

NGSS.MS-LS4-1

Jacob investigated the strength of magnets by playing with magnetic train cars. He slid two cars toward each other. He tried different combinations of the train cars, as shown in the table. Which statement best explains the pattern in Jacob’s observations?

• Two strong magnets will have a strong attractive force when the same poles face each other.

• Two strong magnets will push away from each other with a great force when the same poles face each other.

• Two weak magnets will push away from each other with a great force when the same poles face each other.

• One strong magnet and one weak magnet will have a strong attractive force when the same poles face each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Amazon River dolphins live in groups of up to six dolphins. These groups help the dolphins survive. These are some things Amazon River dolphins do in groups: hunt together, take turns eating and watching for predators, make groups around their young to protect them, whistle and click to talk to one another. A student claims that living in groups helps Amazon River dolphins survive. Which evidence best supports the student’s claim

• The dolphins can see each other.

• The dolphins are able to swim faster.

• The dolphins can play with each other.

• The dolphins are able to protect each other.

Tags

NGSS.MS-LS2-2

The life cycle of humans is similar to the life cycle of dolphins.

Based on their life cycles, how are Amazon River dolphins and humans alike?

• Both change shape as they grow.

• Both are born and then grow larger.

• Both develop bodies that help them swim.

• Both live in groups for protection from predators.

Over time, the number of Amazon River dolphin deaths has decreased.

Which prediction best describes what will happen first as a result of a decreased death rate?

• The population will decrease because all the dolphins will starve.

• The population will stay the same size because the dolphins will live longer.

• The population will increase because more dolphins will survive and reproduce.

• The population will decrease for a while and then increase so that the population size is balanced.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Sometimes a dolphin will be forced out of its group. Predict two effect of a dolphin living without a group. THIS WOULD BE LIKE A SHORT ANSWER QUESTION ON LEAP.

• The dolphin might be more likely to be eaten by predators as there are no other dolphins to provide protection from predators.

• The dolphin might be more likely to survive being eaten by predators as there are more dolphins to provide protection from predators.

• The dolphin may be able to find more food due to the cooperation of other dolphins.

• The dolphin may not be able to find as much food without the cooperation of other dolphins.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

A rancher is trying to predict what will happen when it snows. There is a low hill and a small storage shed on his ranch. The wind usually blows from the east, as shown in the diagram.

In which two places on the ranch will snowdrifts most likely form?

• locations X and Z

• locations W and Z

• locations W and Y

• locations Y and Z

Tags

NGSS.MS-ESS2-5

A snow fence blocks the wind so that snowdrifts will form in a chosen place. The rancher wants to build a snow fence that will prevent the snow from collecting by his storage shed.

Where is the best location for the snow fence?

• location W, because a snowdrift will form on the left side of the fence

• location X, because a snowdrift will form on the right side of the fence

• location Y, because a snowdrift will form on the hill

• location Z, because a snowdrift will form far away from the storage shed

Tags

NGSS.MS-ESS2-5

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

The diagram shows two parent horses and their foal.

Which statements identify traits the foal most likely inherited from its parents?

Select the two correct answers.

• gray hair from its mother

• a white tail from its mother

• a solid hair color from both parents

• a spotted hair pattern from its father

• white hair on its face from both parents

Tags

NGSS.MS-LS3-2