Grade 8 Science Georgia Milestones Review

What is an element in the context of matter?

• A molecule that can be broken down into simpler substances

• Matter that cannot be broken down into simpler substances

• A compound consisting of two or more elements

• The smallest part of an element that is still considered an element

Tags

NGSS.MS-PS1-1

What is the smallest part of an element that is still considered an element?

• A molecule

• A compound

• An atom

• A mixture

What is a molecule?

• A single atom that can exist independently

• A particle that is made of two or more atoms which forms an element if atoms are the same

• A substance that cannot be broken down into simpler substances

• A combination of two or more different elements

Tags

NGSS.MS-PS1-1

Which of the following is an example of a compound?

• Oxygen (O2)

• Hydrogen (H)

• Table Salt (NaCl)

• Nitrogen (N2)

Tags

NGSS.MS-PS1-1

What defines a compound?

• A substance made of one type of atom

• A mixture of different molecules

• Atoms of two or more elements combined in a chemical reaction

• A molecule made of atoms from the same element

What is the characteristic of a mixture that is considered heterogeneous?

• It is the same throughout the mixture.

• It forms a new substance.

• It is noticeably different throughout.

• It cannot be separated into individual components.

What does the term "homogeneous" refer to in a mixture?

• The mixture has a shiny appearance.

• The mixture is malleable.

• The mixture is the same throughout.

• The mixture forms a new substance.

What does "luster" refer to when describing an element?

• The ability to be pulled into wires.

• The ability to be rolled or pulled into shapes.

• The color of the element.

• How shiny the element is.

What does it mean if a substance is described as malleable?

• It can be dissolved in water.

• It can be rolled or pulled into shapes.

• It is very hard and brittle.

• It is a homogeneous mixture.

What is a characteristic of pure substances?

• They can be separated by physical means.

• They consist of multiple types of particles.

• They are made up of only one kind of particle.

• They include pizza and Italian salad dressing.