Leah conducts an investigation by mixing Fe with CuSO₄ and makes a model to help explain why the total mass did not change. Leah's model can also be used to show that a chemical reaction occurred because the products

• are the same size as the reactants

• have the same composition as the reactants

• are at different states of matter compared to the reactants

• have differently arranged atoms compared to the reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

At position A, which hemisphere would have summer?

• Northern hemisphere

• Southern hemisphere

• Neither hemisphere

Tags

NGSS.MS-ESS1-1

In the diagram given, what happens as we move to the left?

• Stars Get Larger

• Stars get Colder

• Stars get hotter

Tags

NGSS.HS-ESS1-3

Our sun is currently in what star stage?

• Protostar

• Nebula

• Main Sequence

• Red Giant

Most stars are made of which elements?

• Hydrogen only

• Hydrogen and Lithium

• Hydrogen and Sodium

• Hydrogen and Helium

Tags

NGSS.HS-ESS1-3

A scientist measures the amplitude and wavelength of waves in the ocean. The scientist also calculates the amount of energy contained in one square meter of water for each wave. The data and calculations for four different waves are shown in the table.

Which wave characteristics, if any, does the energy in the wave depend on?

• the amplitude only

• the wavelength only

• both the amplitude and the wavelength

• neither the amplitude nor the wavelength

Tags

NGSS.MS-PS4-1

Before riding the roller coaster, students are asked to look at a diagram of the track and evaluate the relative potential energy at four points on the roller coaster. The four points, along with their height in meters (m), are shown on the diagram. Which two statements correctly describe the relative potential energy at various points on the track?

• At (1) the potential energy is greater than the potential energy at (3)

• At (2) the potential energy is greater than the potential energy at (3)

• At (3) the potential energy is greater than the potential energy at (4)

• At (4) the potential energy is greater than the potential energy at (2)

Tags

NGSS.MS-PS3-2

Which statement best describes why the second hill of a roller coaster ride is lower than the first hill of a roller coaster ride? If the second hill wasn't lower than the first hill, the roller coaster train would...

• need more mass to absorb enough potential energy to move up the second hill

• have a higher velocity as it moved down the second hill, potentially creating a dangerous ride

• need a source of energy other than the potential energy from the first hill to make it up the second hill

• have even more kinetic energy as it moved down the second hill, potentially creating a dangerous ride.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1