In an aqueous solution, what role does water play?

• Solute

• Solvent

• Precipitate

• Catalyst

Which of the following scenarios best illustrates the concept of dilution?

• Adding more sugar to a cup of tea

• Adding more water to a salty soup

• Boiling water to make it evaporate

• Mixing oil and water

How can you determine if a change is a chemical change rather than a physical change?

• By observing a change in color

• By checking if the substance dissolves

• By comparing the chemical properties before and after the change

• By measuring the temperature

Tags

NGSS.MS-PS1-2

Which of the following is an example of a physical change?

• Rusting of iron

• Burning of wood

• Melting of ice

• Baking a cake

What evidence would suggest that a chemical change has occurred?

• The substance changes shape

• A new substance forms with different properties

• The substance dissolves in water

• The substance changes from solid to liquid

Tags

NGSS.MS-PS1-2

Why does the Sun have a stronger gravitational pull than Earth?

• Because it is closer to the planets

• Because it has a larger mass

• Because it is hotter

• Because it is a star

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What happens to the particles of a substance when it changes from a solid to a liquid?

• They move slower and get closer together

• They move faster and get farther apart

• They stop moving

• They change into different particles

Tags

NGSS.MS-PS1-4

Which of the following best describes the role of gravity in the solar system?

• It causes planets to rotate on their axes

• It keeps planets in orbit around the Sun

• It causes the Sun to emit light

• It creates the atmosphere of planets

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

How does the concept of inertia relate to the motion of planets in the solar system?

• It causes planets to stop moving

• It keeps planets moving in a straight line

• It keeps planets in nearly steady orbits

• It causes planets to move faster

Tags

NGSS.MS-PS2-4

What is the primary source of energy for life on Earth?

• The Moon

• The Earth's core

• The Sun

• The ocean

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3