Science Leap Practice

A builder compares roof designs for a house to be built in an area that has high winds.

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

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

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.

Which of these is NOT a practice of science?

• asking questions

• analyzing data

• making claims without evidence

• carrying out investigations

Tags

NGSS.MS-PS1-2

How many science practices are there?

• 2

• 5

• 6

• 8

Let's dive into the world of science! What exactly is a hypothesis?

• A wild guess, like guessing the number of jellybeans in a jar!

• An observation, like noticing it rains more in April.

• A proven fact, like the earth orbits the sun.

• An educated guess based on observations, like predicting it will rain because you see dark clouds.

Tags

NGSS.MS-LS2-4

Which of these is NOT a practice of science?

• asking questions

• analyzing data

• making claims without evidence

• carrying out investigations

Tags

NGSS.MS-LS2-4

NGSS.MS-PS2-2

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-LS2-4

NGSS.MS-LS2-1

What will most likely occur second as a result of a decreased death rate?

• The population will continue to increase because dolphins are living longer.

• The population will begin to increase because it will be easier to find a mate.

• The population will continue to change at random so that the population size is balanced.

• The population will begin to decrease because there will not be enough food for all the dolphins.

Tags

NGSS.MS-LS2-4