Quiz before the Quiz on Basic Unit of Matter LE9

While studying for a science quiz, Mackiela asked Ashley, 'What is the basic unit of matter?'

• Molecule

• Cell

• Atom

• Electron

In a model of an atom being built by Luna and Mia, where would they place the protons and neutrons?

• In the electron cloud

• Outside the nucleus

• Inside the nucleus

• In the atomic orbitals

In a science project, Noah and Ava are creating a model of water. What holds the hydrogen and oxygen atoms in water together?

• Magnetic forces

• Chemical bonds

• Physical barriers

• Gravitational pull

During a science fair, Ethan and Aria are discussing how atoms combine to form compounds. They focus on the two main types of chemical bonds that facilitate this process. What are these two types?

• Ionic and Metallic

• Covalent and Hydrogen

• Ionic and Covalent

• Metallic and Covalent

When Lilly and Ethan share a piece of cake equally, what does this resemble in terms of electron behavior in a covalent bond?

• Electrons are transferred from one atom to another, similar to one person giving the entire cake to the other.

• Electrons are shared between atoms, just like Lilly and Ethan share the cake equally.

• Electrons are destroyed, akin to the cake disappearing.

• Electrons are created, as if the cake magically multiplies.

Imagine Alex adding sugar to her coffee. What makes the water molecule in the coffee polar?

• One end is positive and the other is neutral.

• Both ends are negative.

• Both ends are positive.

• One end is positive and one end is negative.

Imagine a scenario where Greg is observing water droplets on a spider web and wonders why the droplets stick together rather than spreading out. What is this phenomenon called?

• The attraction between molecules of different substances.

• The attraction between molecules of the same substance.

• The repulsion between molecules of the same substance.

• The repulsion between molecules of different substances.

What is a characteristic of a homogeneous mixture, such as the air Evelyn, Charlotte, and Jackson breathe in a classroom?

• The parts of the mixture are unevenly mixed.

• The mixture has visible boundaries between different substances.

• The parts of the mixture are very evenly mixed.

• The mixture cannot be separated into its components.

When making a saltwater solution for a science project, what are the two main components Brian needs?

• Solvent and solute

• Liquid and gas

• Acid and base

• Element and compound

Jonathan asked Jolee, "What is the range of Acids on the pH scale?"

She said..........

• 7

• 1-7

• 0-6

• 8-14