Leap Science Practice

Use your knowledge of science to answer the following question: Which food chain correctly shows one way the human body gets the energy it needs to repair itself?

• sun > cow > milk > grass > human

• sun > grass > cow > milk > human

• human > milk > grass > cow > sun

• human > grass > sun > cow > milk

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NGSS.MS-LS2-3

Part B: How do humans depend on the sun for energy?

• humans absorb sunlight and make energy in order to live

• humans use energy from the sun to make minerals in the body

• all food sources for human use energy that originally came from the sun

• all factories that make food for humans get electricity from solar energy

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Sanjit is investigating the conservation of matter. He puts a small rock in a plastic bag and seals it. He then hits the rock with a hammer. He observes that the rock

breaks into small pieces and that dust coats the inside of the bag.

Which observation best shows that matter is conserved?

• The mass of the dust plus the mass of the small pieces of rock equals the mass of the original rock.

• The mass of the dust equals the mass of the small pieces of rock plus the mass of the original rock.

• The mass of the small pieces of rock minus the mass of the dust equals the mass of the original rock.

• The mass of the dust plus the mass of the small pieces of rock is greater than the mass of the original rock.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Use the information and your knowledge of science to answer the question.

In the 1600s, a scientist performed an investigation with a willow tree. Here is the procedure he used:

 He filled a pot with 91 kilograms (kg) of soil.

 He planted a small willow tree with a mass of 2 kg in the pot.

 He placed the tree in a sunny area to grow.

 He added water to the pot as needed.

After five years, the scientist removed the tree from the soil. He dried the soil and

found the mass of the tree and the soil. Here is the data that he collected:

 The tree had a mass of 77 kg.

 The soil had a mass of 91 kg.

Which question was the scientist most likely trying to answer?

• How much mass will the soil gain in a year?

• Do plants need sunshine in order to survive?

• How much water do trees need in order to grow?

• Where do plants get the material for their growth?

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NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A scientist has been studying the amount of fresh water stored in polar ice caps for many years. He believes that one of the ice sheets in Antarctica is getting smaller.

What kind of data should the scientist collect to determine whether the ice sheet is changing size?

• Measure the depth of the ice sheet for several months.

• Measure the mass of the ice sheet for several weeks.

• Measure the area and thickness of the ice sheet for several years.

• Measure the width of the ice sheet from satellite images for several days.

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NGSS.HS-ESS2-5

NGSS.HS-ESS3-5

Carlos claims that air is made up of many tiny particles that have mass but are toosmall to see.

Which observations can be used as evidence to support his claim?

Choose the two correct answers.

• rain falling from the clouds

• leaves moving on a windy day

• blowing into a balloon to inflate it

• temperatures rising on a sunny day

• tossing a basketball through the air

• 
• 
• 
• 

Tags

NGSS.5-ESS1-2

A group of friends was talking about why the Sun appears larger than other stars in the sky. They compared the appearance of the Sun with that of other stars.

Which situation best models how the Sun appears larger than other stars?

• People who are close to you have more mass than people who are farther away.

• Trees that are close to you appear taller than trees that are farther away.

• Houses that are close to you appear smaller than houses that are farther away.

• Mountains that are close to you have a greater volume than mountains that are farther away.

• meat

• plants

• sun

• earth

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Based on the graph, which estimate best describes the areas of Earth’s surface covered with salt water and fresh water?

• 69% salt water and 2% fresh water

• 29% salt water and 69% fresh water

• 2% salt water and 29% fresh water

• 2% salt water and 29% fresh water

Tags

NGSS.MS-ESS2-4