100ACT - EC-6 Science Practice Questions: Category 1 & 2

A frozen ice cream bar was left in the sun and melted. Which statement is true regarding the physical properties of the ice cream bar after it melted?

• Its chemical composition had changed

• Its molecules were less energetic after it melted

• Its molecules were larger after it melted

• The arrangement of molecules had changed

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-2

A liquid is heated to its boiling point temperature. If further heat is added to the liquid it will:

• stay at boiling point temperature until all of the liquid has evaporated

• increase in temperature as the liquid evaporates

• increase in temperature but remain a liquid

• decrease in temperature until all the liquid has evaporated

Tags

NGSS.MS-PS1-4

Michelle pours lemonade powder into a cup of ice and water. She stirs it with a spoon to mix up the powder more quickly. What is the solvent?

• the lemonade powder

• the spoon

• the liquid water

• the frozen ice

Samuel rides his bike around the park and over to the pond, and then back to where he started. Which is greater: the distance he traveled or his displacement?

• The distance and the displacement are the same

• distance

• it is impossible to tell from the information given

• displacement

A wind turbine converts:

• kinetic energy into electrical energy

• radiation into electrical energy

• chemical energy into potential energy

• potential energy into kinetic energy

Newton's third law of motion states that for every action there is an equal and opposite reaction. Which of the following is the best example of the application of this law?

• More force is needed to push a wagon full of children than an empty wagon.

• A ball continues to roll when kicked.

• When a car suddenly stops, the passengers keep moving forward until something stops them.

• An airplane moves in the opposite direction of the air pushed out by its engines.

Tags

NGSS.MS-PS2-1

As a demonstration during a unit on heat transfer, a teacher heats one end of along metal rod and later measures the temperature at different positions along the rod. Which of the following processes is demonstrated by the range of temperatures?

• radiation

• condensation

• convection

• conduction

A hockey puck is sliding to the right at constant speed. Suddenly forces of 10 N to the left and 10 N to the right are applied to the puck at the same time. What is the resulting motion of the hockey puck?

• It continues to move right at constant speed

• It begins to slow down

• It begins to speed up

• It stops moving

Tags

NGSS.MS-PS2-2

Why does a red dress appear red when white light shines on it?

• The pigments in the red dress absorb red light and reflect most other colors.

• The pigments in the red dress absorb orange light and reflect yellow light. Removing yellow from orange leaves red.

• The pigments in the red dress reflect orange light and absorb yellow light. Removing yellow from orange leaves red.

• The pigments in the red dress reflect red light and absorb most other colors.

Which of the following colors of visible light has the longest wavelength?

• red

• violet

• yellow

• green