FHS 3.01

Which of the following is an example of how a scientist might use a model?

• A microscope is used to magnify a group of cells on a slide.

• The end of a slinky is moved vertically up and down to simulate a wave.

• A wrench is used to tighten a nut onto a piece of wood.

• A stopwatch is used to time the rate of a chemical reaction.

Which of the following is an example of how a scientist might use a model?

• Microscopes are used to magnify a group of cells on sets of slides.

• Stopwatches measure the amount of time it takes for runners to complete a mile.

• A wrench is used to tighten a nut onto a piece of wood.

• Marbles placed inside a hollow sphere are used to describe protons in a nucleus.

Tags

NGSS.MS-ESS1-1

NGSS.MS-LS1-2

NGSS.MS-LS2-3

NGSS.MS-PS1-1

No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?

• a washing machine

• a wood-burning fireplace

• a capped soda bottle

• a pot of boiling water

Which best explains why a washing machine represents an open system?

• Water and power come from external sources.

• The amount of wash in a load varies

• It has multiple cycles, such as wash and spin.

• Most washers can use a variety of laundry detergent brands.

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

Why is the law of gravity an example of a universal law?

• Gravity is the attraction of any mass to any other mass.

• Gravity is a force that affects everyone on Earth

• Gravity is the reason the Earth revolves around the sun.

• Gravity is a force that exists between any two masses in the universe.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Our understanding of the atom has changed over time. Which idea that was once accepted is now considered scientifically inaccurate?

• The nucleus is the center of the atom.

• An atom is a solid sphere

• Electrons have a negative charge.

• Electrons are arranged in layers.

Tags

NGSS.MS-PS1-1

Microplastics are:

• microbeads in personal care products (toothpaste, facewash)

• small pieces of broken plastic

• the most abundant type of debris in the ocean

• less than 5mm in size (pencil eraser)

Answer explanation

Plastics enter the environment and get broken down into smaller pieces over time. These small pieces end up in our food and water.

In 2015, the US enacted the Microbead-Free Waters Act, preventing microbeads from being added to personal care products.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-PS1-3

El Niño and La Niña can affect weather patterns world wide

• TRUE

• FALSE

Answer explanation

El Niño and La Niña are climate events that occur in the Pacific Ocean. They shift the Polar Jet Stream and Pacific Jet Stream, affecting weather far from the Pacific Ocean.

We are shifting into El Niño, after multiple La Niña seasons.

Maine's weather is projected to be drier and warmer than usual this spring.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

On average, how many gallons of water can you save per day by turning off the tap when you brush your teeth?

• 1 gallons

• 2 gallons

• 6 gallons

• 10 gallons

Answer explanation

DID YOU KNOW? Leaving the water running can waste 2.5 gallons per minute, that adds up fast!