8th Grade Science MAP Review

The diagram below shows the geometric structure of a molecule of water (H20).

What do the symbols represent in the model?

• Genetic Material

• Cells

• Chemical Bonds

• Atoms

Tags

NGSS.MS-PS1-1

A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roofs, eventually causing a small hole in the roof. Which event is NOT a physical change?

• the baseball strikes the roof

• the roof of the car dents

• the paint cracks and chips

• the exposed metal rusts

Which of the following is formed when two elements combine chemically?

• an atom

• a compound

• an electron

• a mixture

Tags

NGSS.MS-PS1-1

Phase changes of matter (evaporation, melting) are examples of _______ changes.

• physical

• chemical

• atmospheric

• mass

Tags

NGSS.MS-PS1-4

What is the smallest unit of a chemical compound that still has the properties of that compound?

• a nucleus

• a molecule

• an element

• an atom

Tags

NGSS.MS-PS1-1

In chemistry, the elements are ...

• Pure chemical substances containing only one type of atom

• Pure chemical substances containing two or more different types of atoms

• Substances which can be burnt in the presence of air

• Substances which do not react with other substances

Copper is an element that is used in electrical wires. What is the smallest unit of copper that still maintains the characteristics of copper?

• the atom

• the electron

• the nucleus

• the proton

Tags

NGSS.MS-PS1-1

The table below shows the number of each kind of atom that makes up one molecule of the compounds sucrose and ethanol. Which of the following is the same for both compounds?

• the mass of each molecule

• the length of each molecule

• the types of atoms in each molecule

• the number of atoms in each molecule

Tags

NGSS.MS-PS1-1

The figure shoes a toaster that toasts bread. Which energy conversion takes place when a toaster is switched on?

• chemical to sound

• electrical to sound

• chemical to thermal

• electrical to thermal

Tags

NGSS.MS-PS3-5

The gravitational force between two objects _________ as the mass of one or both objects increase.

• increases

• decreases

• remains the same

Tags

NGSS.MS-PS2-4