7th Grade Science Fall Semester Exam

What happens when you leave a hot cup of tea in a cool room?

• The tea cools down as heat moves from the warmer tea to the cooler room until both have the same temperature.
• The tea gets hotter as it absorbs cold from the room.
• The temperature of the room increases significantly.
• Nothing happens; the tea maintains its temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What does it mean when your bedroom reaches thermal equilibrium after turning on the heater?

• The entire room becomes evenly warm.
• The heater stops working.
• The room is too hot to stay in.
• Only the area near the heater is warm.

Tags

NGSS.MS-PS1-4

Why does a metal bench feel colder than a wooden bench on a cool day?

• Metal transfers heat more quickly than wood, pulling more heat from your body.
• Wood naturally generates heat on cool days.
• Metal is naturally colder than wood.
• The wooden bench absorbs heat from the environment.

Tags

NGSS.MS-PS3-3

What method of thermal energy transfer occurs because of temperature differences between gasses or liquids?

• conduction
• convection
• radiation
• conduction, convection, and radiation

What method of thermal energy transfer travels in the form of electromagnetic waves?

• conduction
• convection
• radiation
• conduction, convection, and radiation

What method of thermal energy transfer is the direct transfer of heat between particles within a substance that are in direct contact?

• conduction
• convection
• radiation
• conduction, convection, and radiation

The periodic table is organized into three main categories. Which of the following correctly identifies these categories?

• metals, nonmetals, and metalloids
• solids, liquids, and gases
• elements, compounds, and mixtures
• natural, synthetic, and alloys

What does the subscript '3' in the chemical formula Al₂O₃ indicate?

• There are 3 oxygen atoms in the molecule.
• There are 3 molecules of aluminum oxide.
• There are 3 atoms of both aluminum and oxygen in the molecule.
• There are 3 aluminum atoms in the molecule.

Tags

NGSS.MS-PS1-1

Which of the following formulas represents a compound with 1 calcium atom and 2 chlorine atoms?

• CaCl₂
• CaCl
• Ca₂Cl
• Ca₂Cl₂

Tags

NGSS.MS-PS1-1

In the chemical equation 2 H₂ + O₂ → 2 H₂O, what does the coefficient '2' in front of H₂O indicate?

• There are 2 molecules of water produced in the reaction.
• There are 2 hydrogen atoms in each molecule of water.
• There are 2 oxygen atoms in each molecule of water.
• There are 2 molecules of hydrogen used in the reaction.

Tags

NGSS.MS-PS1-5